NewSr Commissioning Engineer (Data Centers) – Remote JobotSr Commissioning Engineer (Data Centers) – RemoteSterling, VARemote$120,000–$165,000 / yearSuccessful candidates will have experience in Electrical Systems & Equipment with a focus in Data Centers and Mission Critical Facilities; experience and an understanding of Building MEP Systems Design, Construction, and Commissioning of Critical Systems ranging in size, rating, and complexity; Commissioning, Testing and Troubleshooting of Electrical Systems and related controls. Knowledgeable with common mechanical, and controls-related building equipment, including: Engine generators / Uninterruptible power supplies & battery systems / Medium and low-voltage electrical switchgear/ PLC controls and sequences of operations / Automatic transfer switches / Static transfer switches / Power distribution units / Busways.
NewSenior Software (AI) Test Engineer PlanIT GroupSenior Software (AI) Test EngineerReston, VADescription: The assigned resource will be responsible for developing the AI program focused on automating requirements and test case preparation, utilizing Visual Studio Code, Python, Copilot AI, and other tools provided by the postal service. • Design and develop test automation scripts using Selenium with Python, leveraging available AI models and LLMs to accelerate script creation, maintenance, and self healing.
Senior DevSecOps Engineer, Lead CredenceSenior DevSecOps Engineer, LeadMcLean, VACollaboration & Knowledge Sharing: Work closely with software developers, cybersecurity teams, and cloud engineers to integrate security and automation into the software development lifecycle (SDLC). This hybrid role requires expertise in DevSecOps best practices, cloud automation, security compliance, and continuous integration/continuous deployment (CI/CD) to enhance the security, scalability, and efficiency of mission-critical applications.
NewLead Test Engineer / Quality Assurance CredenceLead Test Engineer / Quality AssuranceArlington, VA$197,000–$226,000The government seeks a senior technical advisor to act as its authoritative representative for all domains of software test engineering, spanning unit testing, integration testing, end to end regression of mission critical workflows, security testing, and automated quality validation across a modern DevSecOps ecosystem. Our AI, Cloud, Cyber, and Modernization solutions save agencies thousands of hours, safeguarding National Security, Strengthening Health and Humanitarian missions worldwide with 1,700+ team members, 1,500+ AI/ML and Data Experts, and 100+ Prime Contracts, we deliver at scale and with purpose.
NewSenior Firmware Engineer MicrosoftSenior Firmware EngineerWashington, DC$119,800–$234,700 / yearDoctorate in Electrical Engineering, Computer Engineering, Computer Science, or related field AND 1+ year(s) technical engineering experience OR Masters Degree in Electrical Engineering, Computer Engineering, Computer Science, or related field AND 4+ years technical engineering experience OR Bachelors Degree in Electrical Engineering, Computer Engineering, Computer Science, or related field AND 5+ years technical engineering experience OR equivalent experience. There is a different range applicable to specific work locations, within the San Francisco Bay area and New York City metropolitan area, and the base pay range for this role in those locations is USD $160,200 - $261,000 per year.
Sr Cloud Security Engineer PlanIT GroupSr Cloud Security EngineerFalls Church, VAExperience: 8+ years in a technical Cybersecurity Engineering role, with at least 4 years focused on large-scale cloud or hybrid environments, and a portfolio of projects where AI or Machine Learning was directly applied to solve security or operational scaling problems. • API-First Automation: Deep expertise in building "glue code" that connects disparate COTS and custom applications via secure, automated APIs to streamline cross-functional business activities.
Senior Software Engineer, Autonomy Behaviors Shield AISenior Software Engineer, Autonomy BehaviorsWashington, DCThe team is responsible for developing autonomous behaviors within Shield AI’s industry-leading mission autonomy software stack and deploying them across a breadth of platforms, including the Anduril Fury, Northrup Grumman Talon, Shield AI V-Bat, and other first and third-party autonomous vehicles. The Autonomy Capabilities team at Shield AI has assembled a diverse team of experts in software, robotics, control systems, optimization, and data analysis to create software solutions that greatly evolve the capabilities of our customers.
NewSenior Specialist, Federal Data Engineer KPMGSenior Specialist, Federal Data EngineerWashington, DCIf you're looking for a firm with a strong team connection where you can be your whole self, have an impact, advance your skills, deepen your experiences, and have the flexibility and access to constantly find new areas of inspiration and expand your capabilities, then consider a career in Advisory. These include the duties and responsibilities listed above, as well as the abilities to adhere to company policies, exercise sound judgment, effectively manage stress and work safely and respectfully with others, exhibit trustworthiness, and safeguard business operations and company reputation.
Senior Systems Engineer LeidosSenior Systems EngineerBuckeystown, MD$131,300–$237,350As the Senior System Engineer, you will perform and manage the full spectrum of systems engineering tasks to include requirements analysis, feature, system and interface design, system integration, system testing, as well as working with the SE team in support of Model Based Systems Engineering (MBSE) and all associated documentation. As a senior member of the team, you bring deep expertise in Systems Engineering (SE) and will work closely with Systems Engineers, Software Engineers, Architects as well as Government counterparts on the following key tasks:
Senior Field Engineer Sparks GroupSenior Field EngineerSterling, VAThis role is ideal for a hands-on engineer with strong PLC/HMI programming experience who enjoys field work, troubleshooting complex systems, and traveling to customer sites throughout the U.S. and occasionally internationally. Responsibilities : • Program, troubleshoot, and commission PLC- and HMI-based control systems utilizing RSLogix 500, RSLogix 5000, Studio 5000, and FactoryTalk View platforms.
NewSr Electrical PE JobotSr Electrical PEHerndon, VA$125,000–$175,000 / yearTypical duties include writing technical reports, conducting surveys, performing calculations, overseeing, and completing power, telemetry, and telecommunications designs, conducting research and development, systems integration, testing, hands-on assembly, and PLC programming. Seeking a Sr Electrical Engineer to serve as the electrical discipline team leader for the project, directing other engineers and designers as required, provide electrical design expertise and leadership for the entire project, from initial survey through final inspection.
NewSenior Kubernetes Engineer Pinnacle Technical ResourcesSenior Kubernetes EngineerMclean,, Virginia$90–$100 / hourContractorThe specific compensation for this position will be determined by several factors, including the scope, complexity, and location of the role, as well as the cost of labor in the market; the skills, education, training, credentials, and experience of the candidate; and other conditions of employment. 3 plus years with cloud infrastructure: Kubernetes/Docker, cloud databases, application servers, networking (VPC, load balancers, API gateways), Linux, and security/data flows.
Senior Model Based Systems Engineer LeidosSenior Model Based Systems EngineerAlexandria, VA$107,900–$195,050Bachelor’s degree in engineering or related field with 8+ years of prior relevant experience or a master’s degree with 6+ years of experience in one of these areas: systems engineering, software engineering, test engineering or related field. Your role will directly support our diverse portfolio of programs through a combination of requirements and design architecture analysis; MBSE Model development; mentoring junior engineers and assisting technical leadership develop briefing material.
Senior DevOps Engineer LeidosSenior DevOps EngineerBurke, VA$107,900–$195,050p>The Leidos Spatial Solutions Division has an exciting opportunity for a senior DevOps Engineer to assist with the development, integration, deployment, and sustainment of mission critical systems that enable NGA's Geospatial Intelligence (GEOINT) mission collecting sciences, technology and tradecraft measuring and modeling the Globe to provide three-dimensional accuracy of every point in, on, or above the Earth. June 1, 2026 For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.
Senior Network Engineer LeidosSenior Network EngineerAccokeek, MD$107,900–$195,050The Senior Systems Engineer will provide technical leadership and support in the areas of IT planning, solution specification/design, implementation and target architecture development for the AFNCR Consolidated Communication Center (CCC). If you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at LeidosCareersFraud@leidos.com.
Senior Engineer, Software - Autonomous Aircraft Integration Shield AISenior Engineer, Software - Autonomous Aircraft IntegrationWashington, DCFlight Data Capture & Analysis — Manage data collection during missions and post-test analysis, working with autonomy engineers to refine behaviors and identify improvements. • Collaboration Across Teams — Work closely with autonomy, GNC, systems, and test teams to ensure mission-critical functionality is delivered on time and validated thoroughly.
Senior Software Engineer, Autonomous Pilot Integration Shield AISenior Software Engineer, Autonomous Pilot IntegrationWashington, DCCollaboration Across Teams — Work closely with the Autonomy Capabilities team (motion planning, tactics), the Perception team, feature crews, and external partners (platform integrators, vehicle/autopilot control vendors, C2 providers) to deliver and validate mission-critical functionality on time. • Hardware/Software Debugging — Diagnose and resolve integration issues across complex autonomy stacks, payload computers, and embedded systems in lab and field environments — including memory, CPU, and timing profiling under operationally-representative loads.
NewSR. DevOps AWS Cloud Engineer System OneSR. DevOps AWS Cloud EngineerChantilly, VA$180,000 / yearThis role is ideal for someone who enjoys improving CI/CD, partnering closely with developers, and driving reliability + security in production-like environments. You’ll work in a Linux-based, multi-tenant environment and play a key role in building and operating secure, automated delivery pipelines for microservices.
Senior Full Stack Developer NuAxis InnovationsSenior Full Stack DeveloperWashington DC, DCThis role collaborates with Product Owners, Federal Project Managers (FPMs), Business Analysts, Solution Architects, UX/UI Designers, QA Engineers, and DevSecOps teams to deliver end-to-end solutions across the full software development lifecycle. The Senior Full Stack Developer is responsible for designing, developing, integrating, and supporting secure, scalable, and high-performing enterprise web applications using modern cloud-native technologies.
NewSr Substation Engineer - BGE Trans & Substation Baltimore Gas and Electric CompanySr Substation Engineer - BGE Trans & SubstationBALTIMORE, MD$103,200–$141,900We are a Fortune 200 company, 20,000 colleagues strong serving more than 10.7 million customers at six energy companies -- Atlantic City Electric (ACE), Baltimore Gas and Electric (BGE), Commonwealth Edison (ComEd), Delmarva Power & Light (DPL), PECO Energy Company (PECO), and Potomac Electric Power Company (Pepco). Note: Items (1) and (3) are mutually inclusive, whereby the maximum experience requirement reduction is one (1) year (e.g., in the case of an employee with both a Master’s degree in Engineering AND a PE license, the minimum experience requirement would be reduced by one (1) year).
NewSystems Engineer III (VA) GCR Professional ServicesSystems Engineer III (VA)Chantilly, VirginiaContractorSoftware Tools: Familiarity with systems engineering tools and software used for requirements management, modeling and simulation, configuration management, and project documentation (e.g., DOORS, SysML, MATLAB, Simulink). Education: A bachelor's or master’s degree in engineering, preferably in a relevant field such as Aerospace Engineering, Electrical Engineering, or Systems Engineering, Computer or Software Engineering.
Senior Relay Engineering Analyst Constellation EnergySenior Relay Engineering AnalystGlen Burnie, MD$128,700–$143,000Has completed assigned skills and knowledge development training (applicable Advanced Engineering, EPRI, and Constellation University training or industry provided training) to develop expert level of knowledge in designated areas. Recommends equipment, new concepts and techniques to improve performance, simplify construction, reduce costs, correct design or material flaws, or comply with changes in codes or regulations.
NewQuality Control Senior Associate HITT ContractingQuality Control Senior AssociateFalls Church, VA$77,000–$112,000 / yearExecute four phases of control (Planning, Preparatory, Initial and Inspections) for each FOW with the subcontractors, vendors, and client(s) and perform all required meetings for mid-sized to more complex projects. Active certification with the Army Corps of Engineers- Construction Quality Management for Contractors or an inactive certification that needs to be refreshed within 3 months of hire.
System/DevSecOps Engineer NuAxis InnovationsSystem/DevSecOps EngineerWashington DC, DCThis role collaborates with Product Owners, Federal Project Managers (FPMs), Business Analysts, Solution Architects, UX/UI Designers, QA Engineers, and DevSecOps teams to deliver end-to-end solutions across the full software development lifecycle. The Senior Full Stack Developer is responsible for designing, developing, integrating, and supporting secure, scalable, and high-performing enterprise web applications using modern cloud-native technologies.
Lead AI Software Engineer System OneLead AI Software EngineerMcLean, VAThis role is ideal for a senior engineer who can lead the architecture and delivery of full-stack AWS applications while remaining actively involved in design, development, testing, deployment, and technical mentorship. Develop end-to-end solutions across ReactJS frontends, Java or Python backend services, APIs, workflow orchestration, and relational databases.
Senior Software Engineer Teknowleap, IncSenior Software EngineerSterling, VAFull timeSENIOR SOFTWARE ENGINEER (5 positions offered) to design, develop and code applications using Java and Scala; Integrate backend software applications using Postgres and NoSQL databases; Create performance test suite using Jmeter; Implement cloud infrastructure using AWS services; Build Continuous Integration and Continuous Deployment (CI/CD) pipelines using Github, Jenkins and Artifactory. A Bachelor’s degree with 5 yrs of progressively responsible experience will be accepted in lieu of the Master’s degree and 2 years of experience; Any suitable combination of education, training or experience is acceptable.
NewSenior Test Engineer (Partial Telework) GliaCell TechnologiesSenior Test Engineer (Partial Telework)Annapolis Junction, MDFull timeWe also provide customer solutions in the areas of CND, CNE, and CNO by providing our customers with assessments and solutions in Threat Mitigation, Vulnerability Exposure, Penetration Testing, Threat Hunting, and Preventing Advanced Persistent Threat. Playwright, Cucumber, JMeter, Swagger (or similar API tool), Selenium Tools: Cypress, 508 testing tools (JAWS or NVDA).
NewSenior Test Engineer 9th Way InsigniaSenior Test EngineerAshburn, VA$98,135–$125,000 / year9th Way Insignia is seeking a Senior Test Engineer to support the Department of Veterans Affairs (VA) Enterprise Acquisition Systems Service (EASS) under the Electronic Contract Management System (eCMS) System Integration & Operational Support Services (SI/OSS) program. Strong experience in API testing using Swagger/OpenAPI specifications to validated RESTful services, including request/response verification, authentication, status code validation, and negative testing.
Senior Test Engineer S.W.I.F.T. SCRLSenior Test EngineerManassas, VA5+ years of experience in software and systems Integration or testing; developing CI/CD, integration or functional testing of highly scalable, resilient and secure software. We were established to find a better way for the global financial community to move value - a reliable, safe and secure approach that the community can trust, completely.
Senior Test Engineer (TS/SCI w/Poly) PeratonSenior Test Engineer (TS/SCI w/Poly)Annapolis Junction, Maryland$146,000–$234,000 / yearFull timePeraton offers enhanced benefits to employees working on this critical National Security program, which include heavily subsidized employee benefits coverage for you and your dependents, 25 days of PTO accrued annually up to a generous PTO cap and eligible to participate in an attractive bonus plan. As the world’s leading mission capability integrator and transformative enterprise IT provider, we deliver trusted, highly differentiated solutions and technologies to protect our nation and allies.
Senior Test Engineer (TS/SCI w/Poly) Peraton IncSenior Test Engineer (TS/SCI w/Poly)MD$146,000–$234,000 / yearPeraton offers enhanced benefits to employees working on this critical National Security program, which include heavily subsidized employee benefits coverage for you and your dependents, 25 days of PTO accrued annually up to a generous PTO cap and eligible to participate in an attractive bonus plan. As the world's leading mission capability integrator and transformative enterprise IT provider, we deliver trusted, highly differentiated solutions and technologies to protect our nation and allies.
NewSenior Test Engineer GliaCell TechnologiesSenior Test EngineerAnnapolis Junction, MDFull timeWe also provide customer solutions in the areas of CND, CNE, and CNO by providing our customers with assessments and solutions in Threat Mitigation, Vulnerability Exposure, Penetration Testing, Threat Hunting, and Preventing Advanced Persistent Threat. Design, build, and maintain AWS infrastructure including but not limited to EC2, Lambdas, S3, SNS, SQS, Event Router, Athena, Step Functions using Terraform and auto scaling.
Senior Software Test Engineer Frontier Technology IncSenior Software Test EngineerWashington, DCWe are a cutting-edge Defense Innovation Company seeking a Senior QA Engineer to join our engineering organization and raise the bar for quality across our web application portfolio. Partner with developers, product managers, and DevOps to shift quality left and embed testability into design and architecture decisions.
Senior Machine Learning Test Engineer Autodesk IncSenior Machine Learning Test EngineerDCAt Autodesk, we're building a diverse workplace and an inclusive culture to give more people the chance to imagine, design, and make a better world. You are a quality-focused developer who is passionate about reliable, repeatable evaluation of ML models and data.
Senior Test Systems Engineer VTGSenior Test Systems EngineerSpringfield, VirginiaFull timeSenior-level Test Systems Engineers assist in leading Application, System and Integration Testing teams performing test and evaluation across the National System of Geospatial-intelligence (NSG), Allied System of Geospatial-intelligence (ASG) and Federal Agencies to ensure timely and accurate GEOINT. Senior-level systems integration experience working in government or industry integrating large complex System of Systems or Service Oriented Architecture environments residing in cloud, on premise, or hybrid infrastructures.
Senior Test Engineer Ardent Management ConsultingSenior Test EngineerWashington, DCThis role also supports estimation of software testing costs and schedules, and is responsible for installing, configuring, and maintaining automation testing frameworks across multiple environments, including development, pre-production, and production. Position Description: Ardent is seeking an experienced Senior Test Engineer to support the design, development, and execution of advanced testing strategies within complex enterprise environments.
Senior Test & Evaluation Engineer VTGSenior Test & Evaluation EngineerWashington, Washington, DCFull timeExperience with any of the following: Computational Fluid Dynamics especially for aerodynamic high-speed flows, Finite Element Analysis and solid mechanics, Fluid Structure Interaction, Flight dynamics and trajectory calculations (formulated in six degrees of freedom ("6DoF"), Ballistics, Penetration mechanics, Combustion and Thermodynamics. Overview: VTG is seeking a Senior Test & Evaluation Engineer in Washington, DC (near Navy Yard) to provide Engineering Support Services to Engineers and Subject Matter Experts in support of the Conventional Prompt Strike (CPS) Program under the Department of Navy.
Senior Test Engineer - Fire, Lithium Ion Battery, & Explosions Jensen HughesSenior Test Engineer - Fire, Lithium Ion Battery, & ExplosionsBaltimore, MarylandTypical projects range from bench-scale to full-scale testing for evaluation of fire protection system efficacy, consequence characterization for industrial processes and energy storage systems, product testing and evaluation, demonstrative testing for litigation support, performance-based comparison of construction materials for use in engineering judgments, numerical model validation, and applied research initiatives. Today, our expertise extends broadly across closely related security and risk-based fields – from accessibility consulting and risk analysis to process safety, forensic investigations, security risk consulting, emergency management, digital innovation and more.
Senior Test Engineer Sky SolutionsSenior Test EngineerTysons Corner, VARemote$65,000–$135,000 / yearOur expertise spans AI-first enablement, delivering innovative solutions and advanced cybersecurity, fortifying digital ecosystems against emerging threats and digital transformation through low-code/no-code development, cloud solutions, and agile methodologies. The engineer collaborates closely with developers, product owners, and DevOps to ensure high quality, defect free releases across DEV → TEST → IMP → PROD environments.
Senior Test Engineer General Dynamics CorpSenior Test EngineerManassas, VA$85,239–$94,562 / yearQualifications: Bachelors or Technology degree in Engineering, Computer Science, or a related specialized area/field, orequivalent combination of education and relevant work experience, plus 2 years of relevant experience; orMasters degree. Job Summary: The PCS Test Engineer will be responsible for developing, executing, and documenting comprehensive teststrategies for the Payload Control System (PCS), a critical component of our advanced defense solutions.
Senior Level Test and Integration Systems Engineer PeratonSenior Level Test and Integration Systems EngineerChantilly, Virginia$135,000–$216,000 / yearFull timeResponsibilities: We are seeking an experienced Senior Systems Engineer with expertise in systems integration, testing, and enterprise engineering to support mission-critical GEOINT capabilities across the National System of Geospatial-Intelligence (NSG), Allied System of Geospatial-Intelligence (ASG), and other Federal partners. This position is ideal for a technical leader who thrives in complex environments, enjoys mentoring engineers, and has experience supporting large-scale cloud, hybrid, or on-premises systems within the DoD or Intelligence Community.
Senior Test Engineer LeidosSenior Test EngineerAnnapolis Junction, MarylandMarch 19, 2026 For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above. 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.
Sr. Test Engineer LeidosSr. Test EngineerBethesda, MarylandAs a Test Engineer on this program, you will have the opportunity to design, develop, and execute automated tests to ensure the quality and reliability of software applications and services in a Continuous Integration / Continuous Delivery Pipeline within a commercial cloud environment. Collaborate with team members (Scrum Master, Product Owner, Software Developers) to develop test approaches with emphasis on automation of recurring/regression test cases through selected toolsets.
Senior Systems Test Engineer (ONSITE) RTXSenior Systems Test Engineer (ONSITE)MarylandPerform full life cycle systems engineering tasks including system requirements analysis, definition, architecture design, trade studies, integration, verification and validation (V&V), formal testing, and software installation. Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and minimum 5 years prior relevant experience or an Advanced Degree in a related field and minimum 3 years of experience.
Senior Automation and Test Engineer Iridium Satellite, LLCSenior Automation and Test EngineerReston, Virginia$115,000–$160,000 / yearExperience with Network Management pertains to continuously supervising and controlling all links and nodes across the space segment (LEO/MEO/GEO satellites and intersatellite links) and the ground segment (gateways, teleports, user terminals, terrestrial backhaul). Experience with Mission planning, in the context of satellite ground and space systems, is the set of processes, tools, and rules used to translate mission objectives into time-ordered, constraint compliant timelines of spacecraft, payload, and ground activities (including data collection and routing opportunities) across the full mission lifecycle.
Senior Integration and Test Engineer Iridium Satellite, LLCSenior Integration and Test Engineer Reston, Virginia$120,000–$155,000 / yearExperience with Network Management pertains to continuously supervising and controlling all links and nodes across the space segment (LEO/MEO/GEO satellites and intersatellite links) and the ground segment (gateways, teleports, user terminals, terrestrial backhaul). Experience with Mission planning, in the context of satellite ground and space systems, is the set of processes, tools, and rules used to translate mission objectives into time-ordered, constraint compliant timelines of spacecraft, payload, and ground activities (including data collection and routing opportunities) across the full mission lifecycle.
Sr. QA Test Engineer Verisma Systems IncSr. QA Test EngineerDCThis includes creating automated tests, building and scaling our automation framework, and working closely with the QA team to ensure software QA testing best practices. Work closely with engineers, testers, and product management throughout organization to influence product development assisting or improving products.
Senior Test Automation Engineer Synergy ECPSenior Test Automation EngineerWashington, District of ColumbiaThe Senior Test Automation Engineer is Responsible for creating software test and automating test cases, performing application testing, validating bugs, and isolating issues; writing and initiating tests and then analyzing and reporting the test results in the ticketing system; and performing configuration management, change management, and release management. Work/Life Balance : A healthy work/life balance is essential for building and executing your work effectively at NSI/Synergy ECP, but it’s also necessary to allow you the room to pursue everything you want to develop in your personal life.
Senior Cyber Test Engineer (Onsite) Nightwing Intelligence SolutionsSenior Cyber Test Engineer (Onsite)Sterling, Virginia$77,000–$163,000 / yearThe team comprises engineers of multiple disciplines including vulnerability research, reverse engineering, CNO/CNE development, hardware emulation, system engineering, and data analytics. Our capabilities include cyber space operations, cyber defense and resiliency, vulnerability research, ubiquitous technical surveillance, data intelligence, lifecycle mission enablement, and software modernization.
Senior Test Automation Engineer PeratonSenior Test Automation EngineerLanham, Maryland$80,000–$128,000 / yearFull timeHands-on experience with CI/CD pipelines and modern development toolchains, including Jenkins, GitHub/GitHub Actions, GitLab CI, Azure DevOps, version control platforms, test management tools such as Xray for JIRA, and Atlassian-based work management tools. This position supports the IRS Enterprise System Testing (EST) program , which provides comprehensive testing and quality assurance services to ensure mission critical IRS applications are secure, reliable, and ready for deployment.