Senior Manager, Product Management - Developer Experience, AI Coding Tools Capital OneSenior Manager, Product Management - Developer Experience, AI Coding ToolsMcLean, VirginiaCurrently has, or is in the process of obtaining one of the following with an expectation that the required degree will be obtained on or before the scheduled start date: A Bachelor's or Master’s Degree in a quantitative field (Statistics, Economics, Operations Research, Analytics, Mathematics, Computer Science, Computer Engineering, Software Engineering, Mechanical Engineering, Information Systems or a related quantitative field), Business or Marketing. Senior Manager, Product Management - Developer Experience, AI Coding Tools Product Management at Capital One is a booming, vibrant craft that requires reimagining the status quo, finding value creation opportunities, and driving innovative and sustainable customer experiences through technology.
React Software Developer 659 Freedom Technology Solutions GroupReact Software Developer 659Laurel, Maryland$150,000–$200,000 / yearAs soon as an employee enters a customer facility, they touch one of these applications which are critical to the daily functions of thousands of users across acquisition, business, finance, HR, training, recruitment, program management, security, logistics and more. Work closely with system engineers, developers, testers, and product stakeholders to evaluate change requests, support releases, and ensure successful deployment of enhancements.
Senior Software Developer Manager TechOp Solutions InternationalSenior Software Developer ManagerArlington, VATechOp Solutions International is seeking an experienced Remote Senior Software Developer Manager to lead the design, development, implementation, and ongoing support of enterprise call center applications and technology solutions. This position is responsible for managing the full systems development lifecycle (SDLC), overseeing software development activities, and ensuring technology solutions align with business requirements and operational objectives.
Developer-Full Stack Senior Akkodis Group AG.Developer-Full Stack SeniorTysons, VA$85–$90 / hourThe ideal candidate will be responsible for designing, developing, and maintaining scalable Python-based data applications, ETL pipelines, and RESTful APIs to support large-scale data processing and analytics. Strong expertise in Python, PostgreSQL, SQL, and API development using Flask or FastAPI, with proven experience designing and optimizing scalable data-driven applications.
Software/Web Developer KentroSoftware/Web DeveloperSpringfield, VirginiaKentro is always interested in connecting with talented Software and Web Developers who are passionate about building scalable applications, developing modern user experiences, and supporting innovative technology solutions. Ideal candidates bring strong technical expertise, problem-solving abilities, and experience collaborating across teams to deliver high-quality software solutions in fast-paced environments.
Associate Appian Developer Graham Technologies LLCAssociate Appian DeveloperLargo, MDRemoteAt Graham Technologies, we''ve built a family-oriented environment where team members are encouraged to maintain a healthy work-life balance, pursue their passions, and grow professionally through flexible schedules, continued education, and a strong sense of community. This role is ideal for early-career developers looking to expand their experience within a low-code development environment while supporting enterprise workflow automation, application modernization, and system integration initiatives.
Junior Software Developer 682 Freedom Technology Solutions GroupJunior Software Developer 682Annapolis JunctionThese applications are used across the government enterprise and are critical to the daily functions of thousands of users across acquisition, business, finance, HR, training, recruitment, program management, security, logistics and more. Our mission supports the Government Corporate Management Services (CMS) by providing full life cycle support services through the sustainment, modernization, and transformation of the enterprise corporate applications.
Front-End Senior Software Developer By Light Professional IT Services LLCFront-End Senior Software DeveloperHanover, MarylandResponsibilities: As a key member of our Cyber Range Development Team, you will: Design, develop, and test high-performance front-end web applications supporting cyber training platforms used worldwide. Company Overview: By Light Professional IT Services LLC readies warfighters and federal agencies with technology and systems engineered to connect, protect, and prepare individuals and teams for whatever comes next.
Drupal Web Developer AHU Technologies IncDrupal Web DeveloperWashington, DCFull timeShort Description : Client requires the services of a contractor Web Developer with strong Drupal expertise to support the development, maintenance, and modernization of District government websites, including DC.gov and associated agency digital properties. Hands-on experience with the Domain Access module: domain entities, domain access fields on content/users/blocks, and current-domain negotiation.
Senior Web Developer HarmonyTechSenior Web DeveloperWashington, DCThe developer will be responsible for evaluating the technical architecture of the environment, translating business requirements into software applications and modules, designing and implementing improvements to the environment, creating database schemas, tables and stored procedures, providing surge support for maintaining application infrastructure, and assisting with user support for the system. Minimum 5 years developing ASP.NET, ASP.NET MVC and ASP.NET Web API code following established best programming practices.
Pega Developer ATR, LLCPega DeveloperWashington, District of Columbia$140,000 / yearFull timeRequirements:Possess one of the following certifications: CSA (Certified System Architect), CSSA (Certified Senior System Architect)Pega Infinity experiencePrevious Consulting or client service delivery experienceSpecialization in functional area (CRM, deployment, etc.) or industry domain expertiseProven success in contributing to a team-oriented environmentProven ability to work creatively and analytically in a problem-solving environmentDesire to work in an information systems environmentExcellent leadership, communication (written and oral) and interpersonal skillsEducation:Bachelor's degree. Pega DeveloperWe are looking for an experienced Pega Developer to design, develop, and implement business process management (BPM) and workflow solutions using the Pega platform.
Platform Developer (Power Platform & ServiceNow) ATR, LLCPlatform Developer (Power Platform & ServiceNow)Arlington, VirginiaRemoteFull timePlatform Developer (Power Platform & ServiceNow)Location: Arlington, VA (Fully remote with occasional Onsite requirements in Arlington, VA)Eligibility: Candidate must possess an active Secret clearanceProgram Overview: The DOS ESDA Program supports the U.S. Department of State, Global Acquisitions (GA) on a high visibility modernization initiative consolidating fragmented governance, sourcing, and platform support into a unified Integrated EDSA Governance & Shared Services Team. This role focuses on rapid application delivery and workflow automation — executing a high volume of tactical development tasks and building practical solutions that directly address day-to-day business needs.
Oracle/APEX Developer Resource Human Capital Resources and ConceptsOracle/APEX Developer ResourceWashington D.C, DCHuman Capital Resources and Concepts Inc. (HCRC) is a consulting firm that specializes in resource management capabilities that are utilized in all federal organizations. The ideal candidate will have strong experience with Oracle databases and PL/SQL, and be comfortable working in an Agile development environment.
Application Developer EverwatchApplication DeveloperAnnapolis Junction, Maryland$55.28–$80 / hourYou leverage your expertise in Java, Spring Boot, Python, and modern software engineering practices to develop scalable, reliable solutions that enable seamless data exchange and user experiences. Compensation at EverWatch is determined by various factors, including but not limited to location, the individual’s particular combination of education, knowledge, skills, competencies, and experience, as well as contract-specific affordability and organizational requirements.
Senior Drupal Developer AHU Technologies IncSenior Drupal DeveloperWashington, DCFull timeThe Drupal Web Developer is responsible for designing, developing, maintaining, and enhancing web applications and digital platforms built on the latest versions of Drupal (Drupal 9/10/11). The developer collaborates closely with designers, content teams, product owners, and IT leadership to deliver modern, accessible, and high‑performing web solutions.
Oracle APEX Developer HarmonyTechOracle APEX DeveloperNorthern, VAFull timeYou will be working with a high-performing agile team leading, designing and implementing business solutions that involve an enterprise Receivership Management suite of applications. At least 5 years of experience as a hands-on lead developer, developing code and managing projects using required technology stack (see below).
Lead Developer 2 HarmonyTechLead Developer 2Northern, VAFull timeYou will be working with a high-performing agile team leading, designing and implementing business solutions that involve an enterprise Receivership Management suite of applications. At least 5 years of experience as a hands-on lead developer, developing code and managing projects using required technology stack (see below).
Business Objects / Infosphere Developer HarmonyTechBusiness Objects / Infosphere DeveloperNorthern, VAFull timeYou will be working with a high-performing agile team leading, designing and implementing business solutions that involve an enterprise Receivership Management suite of applications. At least 5 years of experience as a hands-on lead developer, developing code and managing projects using required technology stack (see below).
Senior Software Engineer, Developer Services Engineering T. Rowe Price Group IncSenior Software Engineer, Developer Services EngineeringOwings Mills, MD$121,000–$206,000 / yearIn this role, as part of Developer Services Software Engineering team, you will develop, analyze, design, build, and implement infrastructure and software solutions for the enterprise, ensuring that the infrastructure and software solution (the cloud network, resources, software, tools, and related observability) is sufficiently robust, scalable, resilient and efficient to enable delivery and ongoing operation. Experience engineering and supporting cloud-based infrastructure and application platforms, preferably in AWS, including products and services related to the Software Development Lifecycle and compute, storage, networking, security, and observability.
Salesforce Data Cloud Developer TechDigital CorporationSalesforce Data Cloud DeveloperTysons, VAEducation: Bachelor's degree in computer science, Information Systems, Data Engineering, or related field. Technical Skills Salesforce Data Cloud: Ingestion, DMOs, Transformations, Identity Resolution.
NewSenior ServiceNow GRC Developer ApolisSenior ServiceNow GRC DeveloperVienna, VA$85–$87 / hourLead the technical design and implementation of ServiceNow GRC/IRM modules, including Policy and Compliance, Risk Management, Audit Management, Vendor Risk Management (VRM), and Business Continuity Management (BCM). Define and enforce coding best practices specifically for IRM data models, ensuring solutions are upgrade-safe and aligned with the ServiceNow CSDM (Common Service Data Provider) framework.
Sr. Java Developer (IAM Platform) ConsultNetSr. Java Developer (IAM Platform)Rockville, MDFor over 25 years, we have connected thousands of consultants with meaningful roles through a personal, communication-driven approach, partnering with a diverse client base to build high-performing teams and create lasting impact. The engineer will work closely with product owners, architects, and engineering teams to design, develop, and support secure and scalable enterprise platform services.
ServiceNow Developer System OneServiceNow DeveloperFort Meade, MD$90 / hourIdentify trends and find patterns in unstructured and semi-structured customer data that can be used to create a more positive customer experience and increase overall network performance. Design and build ServiceNow Applications and integrations to other applications and platforms, including architecture, languages, best practices, and methodologies in an Agile Scrum environment.
Web Application Developer, Senior AMERICAN SYSTEMSWeb Application Developer, SeniorWashington, Washington, DCFull timeThe ideal candidate brings deep experience in React.js , Node.js , JavaScript , HTML , CSS , SQL , and RESTful API integration , along with the ability to refactor legacy systems , improve application scalability and performance, and collaborate with stakeholders in Agile development environments. Overview: AMERICAN SYSTEMS, a 100% employee-owned federal government contractor, is seeking a Senior Web Applications Developer to support mission-critical initiatives at Joint Base Anacostia-Bolling (JBAB), Washington, DC .
Agile Developer 2-8912-OL Onyx PointAgile Developer 2-8912-OLHanover, MarylandDegree Requirement: Bachelor's degree in System Engineering, Computer Science, Information Systems, Engineering Science, Engineering Management, or related discipline from an accredited college or university is required. An Associate's degree plus 8 years of relevant experience or high school diploma/GED plus 10 years of experience may be considered for individuals with in-depth experience that is clearly related to the position.
NewSenior ServiceNow Developer The Informatics Applications Group IncSenior ServiceNow DeveloperArlington, VAThe ideal candidate will have technical knowledge of ServiceNow architecture and modules, administration, strong problem-solving skills, and the ability to work collaboratively across teams to deliver scalable, enterprise-grade solutions. Consequently, the parties agree that, as applicable, they will abide by the requirements of 41 CFR 60-1.4(a), 41 CFR 60-300.5(a), and 41 CFR 60-741.5(a) and employment decisions shall be based solely on merit and without regard disability, or protected veteran status, or any other characteristic protected by local, state, or federal laws, rules, or regulations.
ServiceNow Developer The Informatics Applications Group IncServiceNow DeveloperArlington, VAThe ideal candidate will have technical knowledge of ServiceNow architecture and modules, administration, strong problem-solving skills, and the ability to work collaboratively across teams to deliver scalable, enterprise-grade solutions. Consequently, the parties agree that, as applicable, they will abide by the requirements of 41 CFR 60-1.4(a), 41 CFR 60-300.5(a), and 41 CFR 60-741.5(a) and employment decisions shall be based solely on merit and without regard disability, or protected veteran status, or any other characteristic protected by local, state, or federal laws, rules, or regulations.
Agile Developer 3-8921-OL Onyx PointAgile Developer 3-8921-OLHanover, MarylandDegree Requirement: Bachelor's degree in System Engineering, Computer Science, Information Systems, Engineering Science, Engineering Management, or related discipline from an accredited college or university is required. An Associate's degree plus 8 years of relevant experience or high school diploma/GED plus 10 years of experience may be considered for individuals with in-depth experience that is clearly related to the position.
Junior Data Analyst/Developer USA The Nature ConservancyJunior Data Analyst/DeveloperArlington, Virginia$79,700–$90,780The Program Intelligence platform enables N4W to gather and make sense of diverse information from a range of on-the-ground partner programs (Partners) and thereby produce relevant intelligence findings that support those Partners' effectiveness and growth, as well as focus on where investments can maximize long-term conservation impact. The key focus for this Junior Data Analyst / Developer role will be supporting the expansion and management of a central Program Intelligence system which uses KoboToolbox, ArcGIS online, Python, and the Databricks Platform to ingest, store, and process data, and then visualizes outputs in Tableau and Power BI.
NewTechnical Lead - Health Information System & Digital Health Palladium Global Holdings IncTechnical Lead - Health Information System & Digital HealthWashington, DCThe Technical Director collaborates closely with the Ministry of Health, United States Government (USG), Office of the Prime Minister, and implementing partners to promote the adoption of scalable, sustainable, and interoperable digital systems. The position plays a critical leadership role in aligning technical interventions with national health priorities, ensuring quality implementation in line with national strategies, and fostering local capacity for long-term system ownership.
Senior ServiceNow Developer (354) iTech AGSenior ServiceNow Developer (354)Arlington, VirginiaThree to five years of hands-on ServiceNow configuration and implementation experience • Solid working knowledge of ITSM modules including Incident, Problem, Change, Service Catalog, and Knowledge Management • Proficient with Flow Designer, Business Rules, Client Scripts, UI Policies, Update Sets, and basic GlideRecord scripting • Experience executing structured test plans, writing test cases, and documenting defects in multi-environment ServiceNow deployments • Familiarity with Now Assist, AI Search, or generative AI features in ServiceNow; demonstrated willingness to develop hands-on expertise on engagement • Working understanding of CMDB structure, CI classes, and basic Discovery concepts • Experience working in Agile or structured delivery frameworks with a Lead Developer or Architect providing technical direction • Strong written communication skills for configuration documentation, test artifacts, and status reporting • Comfortable collaborating with both technical and non-technical stakeholders in a regulated federal environment PREFERRED QUALIFICATIONS . • Second CIS certification in a relevant domain (Customer Service Management, ITOM, or equivalent) • Certified Application Developer (CAD) • Exposure to federal IT environments or compliance-driven ServiceNow implementations • Hands-on experience configuring or testing Now Assist features including incident summarization or AI Search • Familiarity with CMDB data quality concepts, IRE configuration, or ServiceNow Discovery • Experience contributing to Integration Hub configurations or REST API-based integrations within ServiceNow • Performance Analytics or reporting experience including dashboard configuration and indicator setup EDUCATION .
Drupal Developer ITCON ServicesDrupal DeveloperVienna, VARemoteIn addition to technical tasks, the candidate will be responsible for mentoring junior team members, contributing to technical solutions across multiple projects, and providing input on technical proposals. At ITCON, we offer competitive compensation, paid training and development opportunities, healthcare benefits that start on your first day, commuter benefits, work-life balance, and the opportunity to work alongside an amazing and growing team.
Sr. Full Stack Drupal Developer (Remote USA) ITCON ServicesSr. Full Stack Drupal Developer (Remote USA)Vienna, VARemoteIn addition to technical tasks, the candidate will be responsible for mentoring junior team members, contributing to technical solutions across multiple projects, and providing input on technical proposals. At ITCON, we offer competitive compensation, paid training and development opportunities, healthcare benefits that start on your first day, commuter benefits, work-life balance, and the opportunity to work alongside an amazing and growing team.
ServiceNow Technical Developer-ITSM (CSM) MetaPhase Consulting LLCServiceNow Technical Developer-ITSM (CSM)Washington, DCRemoteThe ideal candidate is both technically strong and client-facing: someone who can write and troubleshoot scripts, configure workflows and workspaces, support integrations, document technical decisions, and clearly communicate with non-technical and technical stakeholders. This role is ideal for someone who is comfortable translating client needs into ServiceNow solutions, advising stakeholders on platform capabilities, and developing/configuring scalable ServiceNow functionality in a collaborative Federal delivery environment.
Salesforce Developer - Salesforce Platform Specialist - PT InterSources Inc.Salesforce Developer - Salesforce Platform Specialist - PTAdelphi, MDRemoteWe align strategy with execution and provide secure service solutions by developing and using the latest technologies that thrive our resources to deliver industry-leading capabilities to our clients and customers, making it convenient for our clients to do business with InterSources Inc. Information Evaluation : Ability to critically evaluate information gathered from multiple sources, reconcile conflicts, translate high-level information into detailed solutions, abstract up from low-level information to broader understanding, and distinguish user requests from the underlying true needs.
Sr. Marklogic Developer Leidos Holdings Inc.Sr. Marklogic DeveloperBethesda, MD$107,900–$195,050 / yearAdditionally, based on a DevOps framework, you will participate in and/or direct major deliverables of projects through all aspects of the software development lifecycle, including scope and work estimation, architecture and design, coding, and unit testing. Our talented team is at the forefront in Security Engineering, Computer Network Operations (CNO), Mission Software, Analytical Methods and Modeling, Signals Intelligence (SIGINT), and Cryptographic Key Management.
Agile Developer L3 - Full Stack, Cloud, Microservices Power3 SolutionsAgile Developer L3 - Full Stack, Cloud, MicroservicesAnnapolis Junction, MarylandThere are differentiating factors that can impact a final salary/hourly rate, including, but not limited to, Contract Wage Determination, relevant work experience, skills and competencies that align to the specified role, geographic location, education and certifications as well as Federal Government Contract Labor categories. Design and code new software or modify existing software to add new features-Debug existing software and correct defects-Integrate existing software into new or modified systems or operating environments.
Agile Developer L3 - Full Stack, Cloud, Microservices Technology Resource ExpertsAgile Developer L3 - Full Stack, Cloud, MicroservicesAnnapolis Junction, MarylandThere are differentiating factors that can impact a final salary/hourly rate, including, but not limited to, Contract Wage Determination, relevant work experience, skills and competencies that align to the specified role, geographic location, education and certifications as well as Federal Government Contract Labor categories. Design and code new software or modify existing software to add new features-Debug existing software and correct defects-Integrate existing software into new or modified systems or operating environments.
NewME00666-Agile Developer 3 Momentum Engineering OpeningsME00666-Agile Developer 3Annapolis JunctionThe successful candidate will support the full software development lifecycle, including requirements analysis, architecture and design, front-end and API development, database integration, CI/CD, automated testing, production support, and technical leadership. Seeking a Senior Full Stack Cloud Developer to design, develop, integrate, test, and sustain cloud-based applications and microservices.
Senior Python Developer Federal Agency Background Macpower Digital Assets Edge Private LimitedSenior Python Developer Federal Agency BackgroundWashington, DC$110,000–$125,000 / yearPython Developer and their ideal candidate is a DMV resident with a minimum of 5 years of related experience, a Bachelor's degree in Computer Science, Information Systems, Engineering, Business, or a technical discipline related to the specific skill or the equivalent combination of education, technical certifications or training, or work experience. You should be able to demonstrate strong experience with preparing strategic plans and conducting strategic assessments for the Federal Government and/or large enterprise-wide organizations and/or experience with policymaking and planning involving strategic planning and analysis in complex organizations.
Oracle ADF/Java Developer Nira IncOracle ADF/Java DeveloperWashington, DCNIRA, Inc., a rapidly expanding woman-owned small business, is seeking a Oracle ADF/Java Developer to join our team supporting the Federal Aviation Administration (FAA). Exceptional oral and written communication organizational, critical thinking and analysis, meeting facilitation, verbal and written communications, and interpersonal interactions skills.
Training Course Developer-Instructor – Technical Collection, BF-03-0010 Cyber B.A.T.Training Course Developer-Instructor – Technical Collection, BF-03-0010Linthicum Heights, MarylandApplying Intelligence Community collection management processes and analyzing signals and/or cryptographic data including analog signals in different domains (frequency or time) and signals from multiple telecommunications environments. Using signals analysis tools, techniques, and procedures to determine collection needed to make precise measurements of technical parameters including such things as radio frequency, inter/intrapulse modulation, pulse duration, and scan.
Systems Administrator Verite Group, Inc.Systems AdministratorFort Meade, MDWhat Impact You'll Have: Tailored Access, a GRVTY Company is seeking Systems Administrators to support Department of Defense/IC missions at Fort Meade, MD. Experience working within a cloud environment a plus (Amazon AWS, Azure, or equivalent cloud infrastructure with virtual machines).
Systems Engineer Synergy ECPSystems EngineerAnnapolis Junction, MarylandGreat Corporate Facilities : Come by our corporate office and enjoy a weekly happy hour, take a drive to nearby restaurants, grab a snack or coffee in our café, or utilize our collaborative office space and conference rooms. The company leverages its expertise in data transport solutions, software and systems engineering, and other solutions to deliver critical and innovative capabilities to high-level decision makers that enhance our nation’s security.
Systems Administrator Sr Principal (Ts/Sci With Poly Required) GCI IncSystems Administrator Sr Principal (Ts/Sci With Poly Required)arlington, VAThe employees supporting our customers deliver unique, high-value mission solutions while effectively leveraging the technological expertise of our valued workforce to meet critical mission requirements in the areas of Data Analytics and Software Development, Engineering, Targeting and Analysis, Operations, Training, and Cyber Operations. Demonstrated experience with Hypervisor technologies (Hyper-V virtual machines, virtual networking and failover clustering, KVM, VMware, ESXi and vCenter virtual machines, virtual networking and failover capabilities, etc.).
Geospatial Systems Engineer Meridian SystematicsGeospatial Systems EngineerSpringfield, VAFull timeDesign, develop, and integrate enterprise GIS solutions utilizing ArcGIS Enterprise, ArcGIS Pro, QGIS, GeoServer, PostGIS/PostgreSQL, commercial geospatial exploitation tools (ENVI, RemoteView, ERDAS IMAGINE, Skyline), and interoperable OGC-compliant services (WMS, WFS, WMTS, WCS, and OGC API – Features). Architect, deploy, and maintain containerized geospatial applications and microservices using Docker, Kubernetes, and OpenShift while implementing CI/CD pipelines, automated testing, Static Code Analysis, Container Security Scanning, and vulnerability remediation.
Software Engineer, Intelligent Systems Virginia TechSoftware Engineer, Intelligent SystemsArlington, VirginiaWith a presence in both Blacksburg and Washington, D.C. metro areas, VTNSI serves dual missions of (1) performing cutting-edge research and development for externally sponsored Department of Defense and Intelligence Community programs and (2) cultivating the next generation of national security workforce and thought leaders by engaging students in curricular, extracurricular, and research and development opportunities. As one of the fastest growing thematic research institutes at Virginia Tech, sponsors and collaborators benefit from VTNSI through both highly experienced student talent pipelines and senior technical leadership that addresses some of our nation’s greatest national security challenges and threats.
Business Systems Analyst Senior AHU TechnologiesBusiness Systems Analyst SeniorWashington, District of Columbia$55–$61 / hourThe candidates will become an integral part of the ASD Team, making every problem associated to the platform a problem of their own and will demonstrate the required initiative and critical thinking abilities necessary to resolve all problems and challenges accordingly. Excellent communication skills, the ability to facilitate working meetings, ask probing questions to elicit requirements and ability to understand the feedback to comprehend client responses to translate into documentable requirements.
Embedded Systems Design Engineer Johns Hopkins University Applied Physics Laboratory LLCEmbedded Systems Design EngineerLaurel, MDYou 'll be joining our hardworking team of system engineers, algorithm developers, FPGA and embedded software engineers, and advanced EW technology enthusiasts who enjoy working together to craft creative solutions to complex challenges in addition to bringing real solutions from concept to prototyping. The Johns Hopkins University Applied Physics Laboratory (APL) brings world-class expertise to our nation's most critical defense, security, space and science challenges.
DoD SkillBridge: Systems Administrator or Cybersecurity Specialist TeamWorx Security LLCDoD SkillBridge: Systems Administrator or Cybersecurity SpecialistColumbia, MDYou will assist in discovering vulnerabilities and risks in networks, software systems and Cloud infrastructure with ongoing vulnerability scans, monitoring network data, and ensuring hardware and software applications are patched and remediated. Experience in each of the following: System backup/restore procedures and security practices; System tuning; User administration; Software and hardware installation and maintenance; File management and system troubleshooting; Operating systems (e.g., Windows, Linux, MacOS).