Staff Software Engineer, Security & Privacy AbnormalStaff Software Engineer, Security & PrivacyWashington DC, DCDistributed systems expert – you bring deep experience designing and operating large-scale distributed systems, and have partnered with security teams to build secure-by-default solutions. Were looking for a distributed systems expert who has worked closely with security teams — someone who can drive Product Security at scale and translate that into clear, executable technical roadmaps.
NewStaff Software Engineer (React, TypeScript, Rails, Node) OneMain FinancialStaff Software Engineer (React, TypeScript, Rails, Node)Baltimore, MD$110,000–$132,000 / yearp>In this role, you will work closely with Product, UX, Engineering Managers, and other senior engineers to shape platform architecture, guide technical direction, and deliver scalable, high-quality software that improves the financial wellness of our customers. See OneMain Financial Privacy Policy at https://www.onemainfinancial.com/legal and SonicJobs Privacy Policy at https://www.sonicjobs.com/us/privacy-policy and Terms of Use at https://www.sonicjobs.com/us/terms-conditions.
NewFormal Verification and Software Assurance Engineer Johns Hopkins Applied Physics Laboratory (APL)Formal Verification and Software Assurance EngineerLaurel, MD$100,000–$245,000Experience with (1) Static Analysis tools such as Coverity and Klockwork, (2) Dynamic Analysis tools such as Valgrind, libFuzzer, and Java Pathfinder, (3) Symbolic Execution Engines such as KLEE and angr, (4) Model Checkers such as TLA+ and SPIN, (5) SMT Solvers such as Z3, CVC5 and MathSAT (6) other Automated Theorem Provers such as ACL-2 and GnatProve, (7) Interactive Theorem Provers such as Lean and Rocq, and any other formal methods tools. Experience with formal methods tools and techniques, such as language safety properties, symbolic execution, abstract interpretation, model checking, automated and interactive theorem proving, programming language analysis and design, type theory, static source code analysis, and formal logic.
Principal Software Engineer Above and Beyond Talent AcquisitionPrincipal Software EngineerBaltimore, MD$80–$85 / hourContractorFull timep>Client Info / Who they are: Above and Beyond Talent Acquisition represents the country’s largest lending-exclusive financial company, serving millions with safe, affordable installment loans through 1,500 branches in 44 states. For over 100 years, their dedicated team has helped customers improve their financial lives with responsible, transparent solutions for debt, medical bills, home improvements, and auto purchases.
Staff Engineer (Product) - Remote LaterStaff Engineer (Product) - RemoteWashington DC, DCRemote$175,000–$250,000 / yearBy combining trusted insight with expert guidance, Later removes guesswork from influencer marketing, enabling brands to choose the right creators, execute fully managed campaigns, and drive meaningful growth across awareness, engagement, and revenue. Built on a native, AI-powered platform and more than a decade of proprietary data—including billions of social interactions, impressions, and $2.4B+ in verified influencer-driven purchases—Later helps teams understand what will work before they launch.
Staff Machine Learning Engineer SamsaraStaff Machine Learning EngineerWashington DC, DCRemoteYou believe customers are more than a number: Samsara engineers enjoy a rare closeness to the end user and you will have the opportunity to participate in customer interviews, collaborate with customer success and product managers, and use metrics to ensure our work is translating into better customer outcomes. • You want to impact the industries that run our world: The software, firmware, and hardware you build will result in real-world impact—helping to keep the lights on, get food into grocery stores, and most importantly, ensure workers return home safely.
NewPrincipal Software Engineer (SWE-4) LeidosPrincipal Software Engineer (SWE-4)Annapolis Junction, MD$131,300–$237,350Our 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. Seeking an experienced and talented software developer to join an existing team that develops and manages software products and tools integral to discovering new mobile data related to the mission.
NewSystems Engineer JobotSystems EngineerArlington, VA$100,000–$110,000 / yearInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. Their platforms help agencies improve traffic flow, road safety, and air quality, and they support large-scale, high-volume transportation networks worldwide.
NewIT Support Engineer I, OTS - Field Delivery Amazon.com Services LLCIT Support Engineer I, OTS - Field DeliveryBaltimore, MDAs an IT Support Engineer I, you will use your knowledge and specialized skills to implement technical solutions and provide high quality support for computer hardware, operating systems, or enterprise application software across sites in a defined geographical area. Together, we take ownership for what we do — whether supporting IT infrastructure, developing new technology inhouse, launching a new Amazon Operations facility, or delighting our customers by delivering packages directly to them.
NewBuilding Electrical Engineer JobotBuilding Electrical EngineerArbutus, MD$90,000–$120,000 / yearInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. We are seeking an Electrical Engineer II to support the design and delivery of electrical systems across multiple office locations, including Columbus, Akron, Baltimore, Jacksonville, and Pensacola.
NewVP/D Engineer - Software Regulatory & Compliance OneMain FinancialVP/D Engineer - Software Regulatory & ComplianceBaltimore, MD$80,000–$96,000 / yearThe leader will be responsible to collaborate with business, operations, product, and technology partners to deliver the engineering, systems integration and process improvement needs for all aspects of the Regulatory & Compliance support systems, inclusive of the day-to-day running of the engineering teams. Excellent verbal and written communication skills required for composing and delivering technical presentations or other forms of documentation to various level of technical and non-technical management.
NewNetwork Software Engineer Johns Hopkins Applied Physics Laboratory (APL)Network Software EngineerLaurel, MD$100,000–$245,000As a member of our team, you will be responsible for the design, development, integration, and test of communications and network software, including protocol implementation, network services, and distributed systems for the Government across numerous departments and agencies. Architect, develop, integrate, and test software-based command and control, secure communication, and networking systems in operationally-realistic environments, working closely with sponsors to ensure mission success.
NewSr Energy Engineer - DC JobotSr Energy Engineer - DCWashington, DC$90,000–$155,000 / yearProject Managers work independently on complex projects, network to expand the market outreach for Existing Building Decarbonization projects, and collaborate closely with clients, contractors, and internal teams. – Lead energy modeling and building performance simulations and perform life-cycle cost analyses to evaluate the ROI and overall economic feasibility of various decarbonization strategies, including high-efficiency HVAC systems and the integration of geothermal and other renewable energy sources.
NewSoftware Reverse Engineer LeidosSoftware Reverse EngineerColumbia, MD$107,900–$195,050March 17, 2026For 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. 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.
NewDigital Pathology Field Service Engineer TD SYNNEXDigital Pathology Field Service EngineerWashington, DCWe are looking for highly skilled and customer-focused Field Service Engineers to support our cutting-edge digital pathology systems in clinical environments. Connect with Your Community: Participate in internal, peer-led inclusive communities and activities, including business resource groups, local volunteering events, and more environmental and social initiatives.
NewSoftware Engineer for Sensor/Weapon Command & Control Johns Hopkins Applied Physics Laboratory (APL)Software Engineer for Sensor/Weapon Command & ControlLaurel, MD$100,000–$245,000We are seeking talented team members to apply knowledge from multiple fields—math, physics, engineering, computers science, data science, others—to build and deploy software systems that address problems in these areas, and to ultimately improve the capabilities of our nation's developmental and deployed defensive systems. We are a team of 40+ engineers and scientists who perform innovative research, modeling, analysis, testing, and prototype development in the cruise/ballistic/hypersonic missile defense and electronic warfare domains.
NewClinical Engineer Technician III MedStar HealthClinical Engineer Technician IIIWashington, DC$28.76–$48.96Under the general oversight of the Clinical Engineering leadership team the Clinical Engineering Technician III as an expert technician maintains clinical equipment with minimal supervision through the effective use of the medical equipment management plan and all medical equipment policies and procedures and manufacturer or alternative equipment maintenance (AEM) specifications. related military work/training in mechanical electrical bio medical engineering or academic work or actual work experience aligned with AAMI's Core Competencies for the Biomedical Equipment Technician.
Clinical Engineer Technician II MedStar HealthClinical Engineer Technician IIBaltimore, MD$28.76–$48.96Under the general direction of the Clinical Engineering leadership team the Clinical Engineering Technician II is primarily responsible for maintaining clinical equipment and systems considered to be advanced specialty highly sophisticated integrated technology or requiring manufacturer service training or certification through the effective use of the medical equipment management plan while adhering to all medical equipment policies and procedures and manufacturer or alternative equipment maintenance (AEM) specifications. related military work/training in mechanical or electrical engineering or academic work or actual work experience aligned with AAMI's Core Competencies for the Biomedical Equipment Technician.
Cyber Range Engineer By Light Professional IT ServicesCyber Range EngineerFt. Meade, MD5+ years of combined experience with Computer Network Operations (CNO)/ Computer Network Exploitation (CNE)/ Computer Network Defense (CND) platforms, cyber training, validation exercises, and working with cyber protection teams (CPTs), including planning, coordinating, and execution. The successful candidate possesses hands-on experience in both Windows and Linux systems, virtualized infrastructures, and cybersecurity tools, with the ability to develop, deploy, and troubleshoot complex training scenarios.
NewProject Engineer The H&K GroupProject EngineerFinksburg, MDThe Project Secretary provides administrative and operational support to project managers and the entire team to ensure smooth project coordination, documentation management, communication, and other aspects of the operations. Beginning as a small family business a half century ago, we are now a dynamic group of vertically integrated companies that has been growing and prospering for over 50 years.
NewStaff Software Engineer InfovisionStaff Software EngineerMultiple LocationsFull timeDefining detailed roadmaps for migrating monolithic systems into target-state technology comprising distributed systems and microservice deployments, built on resilient and scalable cloud infrastructure. Demonstrating leadership through influence via participation in communities of practice, proof-of-concept implementations, and mentoring other team members in engineering best practices.
NewIT Support Engineer I, Ops Tech Solutions (OTS) Amazon.com Services LLCIT Support Engineer I, Ops Tech Solutions (OTS)Sparrows Point, MDAs an IT Support Engineer I, you will use your knowledge and specialized skills to implement technical solutions and provide high quality support for computer hardware, operating systems, or enterprise application software across sites in a defined geographical area. Together, we take ownership for what we do — whether supporting IT infrastructure, developing new technology in-house, launching a new Amazon Operations facility, or delighting our customers by delivering packages directly to them.
NewSenior AI Engineer (SWE-3) LeidosSenior AI Engineer (SWE-3)Linthicum Heights, MD$107,900–$195,050Mission Focus: Collaborate closely with technical leadership to design, develop, and maintain LLM orchestration frameworks that coordinate static analyzers, retrieval-augmented generation (RAG) systems, and automated testing pipelines. 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.
Systems Integration Engineer (NDA-2) LeidosSystems Integration Engineer (NDA-2)Fort Meade, MD$73,450–$132,775Bachelor's degree plus 5-years of relevant experience, or master’s degree plus 3-years of relevant experience or an associate’s degree plus 7-years of relevant experience or high school diploma/GED plus 9-years of relevant experience may be considered. Relevant experience must be in computer or information systems design/development, programming, information/cyber/network security, vulnerability analysis, penetration testing, computer forensics, information assurance and/or systems engineering.
NewDeputy Embedded Software Engineering Manager Johns Hopkins Applied Physics Laboratory (APL)Deputy Embedded Software Engineering ManagerLaurel, MD$105,000–$290,000We are seeking an Assistant Group Supervisor of the Embedded Applications Group to help shape the direction and work for a multifaceted and passionate organization of 50+ engineers that crafts and delivers world class embedded software that enables our nation’s space exploration and national security. Develop strategic plans and the technical roadmap for the continuous advancement of the group’s technology, products, staff, and services such as spacecraft flight software engineering, high-fidelity real-time test environments, and autonomy systems.
NewSignal Processing Engineer Johns Hopkins Applied Physics Laboratory (APL)Signal Processing EngineerLaurel, MD$100,000–$245,000You'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. The Johns Hopkins University Applied Physics Laboratory (APL) brings world-class expertise to our nation’s most critical defense, security, space and science challenges.
NewLead Security Engineer with TS/SCI Poly LeidosLead Security Engineer with TS/SCI PolyAnnapolis Junction, MD$154,050–$278,475The selected individual will lead all security engineering efforts for a large, complex network environment with geographically distributed systems; and will manage a team of Information Systems Security Officers (ISSOs) and Information Systems Security Engineers (ISSEs), providing technical leadership and direction to meet program requirements. At least twelve years of experience with defense-in-depth principals/technology (including access control, authorization, identification and authentication, public key infrastructure, network and enterprise security architecture) and applying risk assessment methodology to system development.
NewMetal Additive Manufacturing Engineer Johns Hopkins Applied Physics Laboratory (APL)Metal Additive Manufacturing EngineerLaurel, MD$100,000–$245,000Have a high level of proficiency with at least two of the following software tools: parametric CAD (e.g., SolidWorks, CREO, NX), stl editing software (e.g., Magics, Netfabb, Meshmixer), or build preparation software (e.g., EOSPrint, QuantAM). As a member of our team, you'll build hardware that explores other planets and interstellar space through various NASA missions as well as building critical prototype hardware for our nation's national security and national health interests.
NewComputer Aided Manufacturing Engineer Johns Hopkins Applied Physics Laboratory (APL)Computer Aided Manufacturing EngineerLaurel, MD$100,000–$245,000Computer Aided Manufacturing Engineering for incoming printed circuit boards including rigid, rigid-flex, and flexible circuits, as well as developing processing flows for the fabrication area using CAM software. APL provides eligible staff with a comprehensive benefits package including retirement plans, paid time off, medical, dental, vision, life insurance, short-term disability, long-term disability, flexible spending accounts, education assistance, and training and development.
Enterprise Architect/Systems Engineer LeidosEnterprise Architect/Systems EngineerBethesda, MD$131,300–$237,350Our 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. 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.
NewAI Platform and DevSecOps Engineer Johns Hopkins Applied Physics Laboratory (APL)AI Platform and DevSecOps EngineerLaurel, MD$100,000–$245,000Your primary responsibility will be to develop, maintain, and continuously update a secure library of containerized software and supporting stacks, along with implementing automated pipelines for container builds, testing, and validation and ensuring compatibility across multiple operating systems and architectures. Working within the Advanced Mission Modeling and AI Group (JAM) in the National Security Analysis Department (NSAD), you will play a critical role in ensuring that AI capabilities are not just developed—but successfully fielded and maintained across DoD and Combatant Command infrastructures.
NewSenior Engineer / Analyst for ISRT & BMC2 Applications Johns Hopkins Applied Physics Laboratory (APL)Senior Engineer / Analyst for ISRT & BMC2 ApplicationsLaurel, MD$100,000–$245,000Our engineers and analysts apply a wide-range of disciplines such as sensor and data fusion, signal and image processing, operations research, applied physics, and artificial intelligence to build systems that automatically or autonomously orchestrate sensors, process data into information, and make intelligent inferences and predictions about complex threats and environments. Have domain knowledge in ISR processes, systems, platforms, and sensors used by the US military and intelligence community; Navy and Air Force kill chain concepts; targeting, C2, and mission planning processes and tools; threat systems, weapon platforms and systems, and communications networks.
Machine Learning Engineer Capgemini Government Solutions LLCMachine Learning EngineerWashington, DCHowever, employees who have access to the compensation information of other employees or applicants as a part of their essential job functions cannot disclose the pay of other employees or applicants to individuals who do not otherwise have access to compensation information, unless the disclosure is (a) in response to a formal complaint or charge, (b) in furtherance of an investigation, proceeding, hearing, or action, including an investigation conducted by the employer, or (c) consistent with the contractor’s legal duty to furnish information. Capgemini Government Solutions (CGS) LLC is seeking a highly motivated Machine Learning (ML) Engineer with an active security clearance to deliver high-quality code components to power the services, servers, distributed systems, and backend architecture.
NewSubsea Lead Program Engineer LeidosSubsea Lead Program EngineerArlington, VA$131,300–$237,350Strong technical focus, ability to support team leadership, and establish strong, collaborative working relationships with government customers, technical staff, senior managers, and peers. 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.
Systems Integration Engineer LeidosSystems Integration EngineerMount Airy, MD$87,100–$157,450TFDM program is a Federal Aviation Administration’s (FAA) NextGen program based on airport surface management provides that efficiencies for both the airport surface and terminal airspace by providing a new and comprehensive integrated surface traffic control and management system. June 25, 2026For 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.
Lead Systems Integration Engineer LeidosLead Systems Integration EngineerGlenwood, MD$87,100–$157,450TFDM program is a Federal Aviation Administration’s (FAA) NextGen program based on airport surface management provides that efficiencies for both the airport surface and terminal airspace by providing a new and comprehensive integrated surface traffic control and management system. June 3, 2026For 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.
NewAI Systems Engineer (SE-3) LeidosAI Systems Engineer (SE-3)Fort Meade, MD$107,900–$195,050The engineer will work closely with mission stakeholders to build agentic AI solutions that automate research, analysis, reporting, and data workflows while creating intuitive natural language interfaces that make complex Knowledge Graphs accessible to users. Desirable Skills: Experience creating interactive visualizations that transform complex data science insights into compelling, actionable intelligence for end users and decision-makers.
NewWeapon Control Analyst/Engineer, Shipboard Systems Group Johns Hopkins Applied Physics Laboratory (APL)Weapon Control Analyst/Engineer, Shipboard Systems GroupLaurel, MD$100,000–$245,000We are seeking a current or former Trident II D5 Strategic Weapon System (SWS) operator to serve as a Subject Matter Expert (SME) on a cross-disciplinary team dedicated to supporting the Navy and warfighter through system analysis and virtual trainer development. Do you love the idea of designing immersive training systems that train sailors to operate the weapon system, while also analyzing data to ensure it continues performing at peak efficiency?.
NewDigital Signal Processing Engineer Johns Hopkins Applied Physics Laboratory (APL)Digital Signal Processing EngineerLaurel, MD$100,000–$245,000You will work with engineers and scientists to develop new concepts for software defined radios and payloads for space RF and optical systems for communications, PNT, remote sensing, and ISR&T applications. Are willing and able to accommodate flexible hours for spacecraft level testing activities for short periods of time, infrequent travel to customer or sponsor locations as well as spacecraft integration and test sites.
NewSystem Realization and Resilience Engineer Johns Hopkins Applied Physics Laboratory (APL)System Realization and Resilience EngineerLaurel, MD$100,000–$245,000You will participate as a systems engineer on various projects, studies, and technical working groups focusing on requirements development, analysis, concept/technology development, acquisition, test planning and execution, system evaluation, and risk assessments across the program lifecycle. APL provides eligible staff with a comprehensive benefits package including retirement plans, paid time off, medical, dental, vision, life insurance, short-term disability, long-term disability, flexible spending accounts, education assistance, and training and development.
NewSenior System Realization and Resilience Engineer Johns Hopkins Applied Physics Laboratory (APL)Senior System Realization and Resilience EngineerLaurel, MD$100,000–$245,000You will participate as a systems engineer on various projects, studies, and technical working groups focusing on requirements development, analysis, concept/technology development, acquisition, test planning and execution, system evaluation, and risk assessments across the program lifecycle. APL provides eligible staff with a comprehensive benefits package including retirement plans, paid time off, medical, dental, vision, life insurance, short-term disability, long-term disability, flexible spending accounts, education assistance, and training and development.
Systems Engineer LeidosSystems EngineerBethesda, MD$87,100–$157,450If 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. April 28, 2026For 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.
NewAI-Enabled Cyber Capabilities Developer Johns Hopkins Applied Physics Laboratory (APL)AI-Enabled Cyber Capabilities DeveloperLaurel, MD$105,000–$290,000It requires designing AI-native architectures, orchestrating tool-using agents, and rapidly iterating on prototypes that demonstrate functional, outcome-driven impact. The Johns Hopkins University Applied Physics Laboratory (APL) brings world-class expertise to our nation’s most critical defense, security, space and science challenges.
Optimization Tech Debt Engineer (Engineer Software 2) - 27217 Company ConfidentialOptimization Tech Debt Engineer (Engineer Software 2) - 27217Aberdeen Proving Ground, MD$78,406–$90,000Full timeOur capabilities range from C5ISR, AI and Big Data, cyber operations and synthetic training environments to fleet sustainment, environmental remediation and the largest family of unmanned underwater vehicles in every class. Our workforce includes skilled tradespeople; artificial intelligence, machine learning (AI/ML) experts; engineers; technologists; scientists; logistics experts; and business administration professionals.
Staff Software Engineer, Data Platform Circle Internet Financial LLCStaff Software Engineer, Data PlatformDC$195,000–$257,500 / yearCircle's platform includes the world's largest regulated stablecoin network anchored by USDC, Circle Payments Network for global money movement, and Arc, an enterprise-grade blockchain designed to become the Economic OS for the internet. Develop and maintain core services and libraries to enhance critical platform functionalities, such as cataloging data assets and lineage, tracking data versioning and quality, managing auto-backfilling, implementing access controls on data assets.
Staff Software Engineer - Interagency Modeling & Simulation Prototype (Contingent) Applied Research Associates IncStaff Software Engineer - Interagency Modeling & Simulation Prototype (Contingent)Arlington, VAAs a Software Engineer on a multi-disciplinary team, you will apply your knowledge of machine learning algorithms and modeling & simulation building a prototype analysis capability for an inter-agency product development team on high-performance computers. Company & Division Information: Applied Research Associates, Inc. is an employee-owned international research and engineering company recognized for providing technically superior solutions to complex and challenging problems in the physical sciences.
Senior/Staff Software Engineer, Developer Experience CohereSenior/Staff Software Engineer, Developer ExperienceDCYoull build the systems, frameworks, and culture that allow the rest of engineering to own quality themselves; improving and extending our testing platform by creating the infrastructure that allows engineers to write and execute tests, and enable every engineering team to ship with more confidence. Design and implement automation pipelines that support comprehensive testing across multiple environments with varying feature flags and realistic customer data profiles.
Staff Software Engineer GiveCampusStaff Software EngineerWashington, DCServing as a technical thought leader and advisor across pods, helping other teams resolve their toughest challenges and guiding long-term technical planning. We have a beautiful 12,000sf office in Washington, DC that is available for people to use whenever they want, and we regularly organize team meet-ups, visit partner institutions, and host retreats in various locations.