Mid - Senior Level Software Development Engineer in Test System OneMid - Senior Level Software Development Engineer in TestMerrifield, VAAs a member of this team your role will be a Software Development Engineer in Test (SDET) working in a Scrum environment, you will test software applications and features using test suites and scripts, perform anomaly reporting, software analysis, develop automated software test packages using various technologies, perform functional and performance testing. Experience with Test processes, open-source test frameworks, test design strategies, writing test cases, and automating tests in Java with frameworks like JUnit/TestNG, Selenium, JMeter and Appium.
Floodplain and Dam Engineer - Technical Lead System OneFloodplain and Dam Engineer - Technical LeadChantilly, VAThe Floodplain and Dam Engineer - Technical Lead involves work on floodplain modeling, floodplain permitting, floodplain crossing design, dam modeling, and dam permitting. Floodplain work includes both local and FEMA-regulated areas, while dam-related efforts focus on state-regulated dams in Virginia and Maryland.
Floodplain and Dam Engineer System OneFloodplain and Dam EngineerChantilly, VAThe Floodplain and Dam Engineer position involves work across floodplain modeling, permitting, floodplain crossing design, dam modeling, and dam permitting. System One, and its subsidiaries including Joulé and Mountain Ltd., are leaders in delivering outsourced services and workforce solutions across North America.
Sr Electrical Engineer (Secret Clearance) System OneSr Electrical Engineer (Secret Clearance)Chantilly, VA$110,000–$170,000 / year10+ years of experience in design and specification of: lighting systems, power systems, fire alarm systems, telecom/data systems, medium voltage power systems, UPS systems, emergency generator systems, grounding systems, and utility systems. System One, and its subsidiaries including Joulé and Mountain Ltd., are leaders in delivering outsourced services and workforce solutions across North America.
NewMid-Level Backend Software Engineer System OneMid-Level Backend Software EngineerGaithersburg, MD$60–$80 / hourRequirements Bachelor’s degree in Computer Science, Software Engineering, or a related field with 4–8 years of experience; or a Master’s degree with 2–6 years of experience. System One, and its subsidiaries including Joulé and Mountain Ltd., are leaders in delivering outsourced services and workforce solutions across North America.
Senior Software Engineer System OneSenior Software EngineerFort Belvoir, VAThe ideal candidate has strong full stack development experience, technical leadership capabilities, and experience building applications on Palantir Foundry or a comparable enterprise data platform. You will build user-facing applications, backend services, APIs, and data integrations while working directly with Army users and product designers.
Senior Software Engineer C# System OneSenior Software Engineer C#Merrifield, VA$105,000–$120,000 / yearThe ideal candidate will possess advanced software engineering expertise, strong development skills, and the ability to mentor team members while contributing hands-on to complex technical initiatives. We are seeking an experienced Senior Software Engineer to provide technical leadership and drive the design, development, and delivery of mission-critical software solutions.
NewSr DevSecOps Engineer System OneSr DevSecOps EngineerFort Meade, MD$140,000 / yearThis role bridges full-stack software development with automated security gates, enforcing compliance with DoDI 8430 (Accelerated Mission Software Development), the DoD Software Modernization Strategy, and Continuous Authorization to Operate (cATO) criteria. cATO & Governance Automation - Implement automated policy-as-code to satisfy continuous compliance gates under DoDI 8430 and OSD CIO cATO requirements (Real-time Visibility, Active Cyber Defense, Pipeline Attestation).
NewJava Backend Engineer - Onsite Interview required System OneJava Backend Engineer - Onsite Interview requiredVienna, VA$70–$80 / hourSystem One, and its subsidiaries including Joulé and Mountain Ltd., are leaders in delivering outsourced services and workforce solutions across North America. Design, build, integrate, and maintain secure backend services and APIs supporting mobile, web, enterprise, and partner systems.
NewSenior Network Engineer/IPv6 SME System OneSenior Network Engineer/IPv6 SMEAlexandria, VA$72.25–$87 / hourDesign, implement, and troubleshoot enterprise-scale IP networks, including enterprise routing, switching, and protocols such as BGP, OSPF/OSPFv3, EIGRP, IS-IS, IPv4/IPv6, DNS, DHCP/DHCPv6, ICMP/ICMPv6, TCP/IP, and SNMP. • Relevant certifications such as CCIE/CCNP, JNCIP/JNCIE, IPv6 credentials, Azure Netowrk Engineer, AWS Advanced Networking, CISSP, Security+, or equivalent are preferred.
Wireless Network Engineer System OneWireless Network EngineerBethesda, MD$85,000 / hourUtilize your networking expertise and evolving technologies to develop solutions in a fast-paced, collaborative, highly secure, and compliant environment that supports scientific discovery. Help ensure the network infrastructure, internet, and intranet services are available with maximum uptime by quickly and thoroughly responding to incidents, requests, and outages.
Palo Alto Firewall Engineer System OnePalo Alto Firewall EngineerSpringfield, VA$80 / hourDeep practical knowledge of legacy Gen 2/Gen 3 Palo Alto hardware, including PA-3000 and PA-5000 series platforms, legacy CLI, hardware troubleshooting, and line-card replacements. Advanced understanding of BGP, OSPF, IPSec VPNs, NAT, TLS/SSL, mutual TLS (mTLS), HTTP, SAML, OAuth, OCSP revocation, DoD PKI, Kerberos, LDAP, and Active Directory.
AI Engineer BERING STRAITS PROFESSIONAL SERVICES LLCAI EngineerWashington DC, DCArchitect reliable agentic systems incorporating workflow orchestration, model and tool integration, state management, authorization controls, human review, exception handling, and auditability. Essential and marginal functions may require maintaining physical condition necessary for bending, stooping, sitting, walking or standing for prolonged periods of time; most of time is spent sitting in a comfortable position with frequent opportunity to move about.
NewSenior Infrastructure Automation Engineer System OneSenior Infrastructure Automation EngineerWashington, DCRemote$78.25–$95 / hourThe SEC environment is expanding automation from an existing baseline and establishing a repeatable model that technical teams can use to automate infrastructure configuration, software and agent deployment, patching, operational procedures, and approved remediation without creating unnecessary dependencies on a single infrastructure team. System One IT has a remote, 12 month+ contract opening for a Senior Infrastructure Automation Engineer to support our client with their SEC ISS2 contract by architecting, engineering, and building an enterprise infrastructure and operations automation capability centered on Red Hat Ansible Automation Platform and Ansible.
NewSystems Engineer – Air Traffic Management JobotSystems Engineer – Air Traffic ManagementGaithersburg, MDRemote$140,000–$170,000 / yearThe ideal candidate has a strong background in formal systems engineering environments and is comfortable translating complex operational needs into well-defined technical requirements while working closely with customers, software teams, integration/test teams, and other engineering disciplines. With deep expertise in cloud-first architectures, automation, DevSecOps, virtualization, reliability engineering, and large-scale systems integration, we help organizations modernize infrastructure, improve operational efficiency, and support mission-critical environments where performance, security, and resiliency are essential.
Security Engineer System OneSecurity EngineerLaurel, MDHands-on experience with UiPath architecture: Orchestrator, attended/unattended robots, assets and credential stores, queues, and robot host builds. System One, and its subsidiaries including Joulé and Mountain Ltd., are leaders in delivering outsourced services and workforce solutions across North America.
NewDevSecOps Engineer System OneDevSecOps EngineerGaithersburg, MD$70–$80 / hourBachelor’s degree in Computer Science, Engineering, or related discipline with 4–8 years of relevant experience; or Master’s degree with 2–6 years of relevant experience. System One, and its subsidiaries including Joulé and Mountain Ltd., are leaders in delivering outsourced services and workforce solutions across North America.
Modern Workplace Engineer System OneModern Workplace EngineerMerrifield, VA$60–$70 / hourDevelop automation solutions utilizing PowerShell and Microsoft Graph APIs; eliminate manual operational tasks through workflow automation. • Serve as a senior technical resource responsible for endpoint engineering, automation, platform modernization, and operational efficiency initiatives.
Project Engineer System OneProject EngineerFrederick, MD$80,000–$120,000 / yearEducation: Bachelor’s degree in Engineering required (ABET-accredited preferred); will also consider highly technical degrees such as Computer Science, Physics, Chemistry, Mathematics, or similar. Experience: ideally 3–4 years (open to 2+ years) in a project engineering or similar role, preferably in electrical construction or with an electrical contractor.
Mid Level Software Engineer C# System OneMid Level Software Engineer C#Merrifield, VA$95,000–$105,000 / yearSystem One, and its subsidiaries including Joulé and Mountain Ltd., are leaders in delivering outsourced services and workforce solutions across North America. Join our team and help build innovative software solutions that drive business success while advancing your career in a dynamic and collaborative environment.