ServiceNow Developer (TS/SCI clearance) System OneServiceNow Developer (TS/SCI clearance)Suitland-Silver Hill, MD$200,000 / yearSystem One, and its subsidiaries including Joulé and Mountain Ltd., are leaders in delivering outsourced services and workforce solutions across North America. Work on a team responsible for the implementation and configuration of multiple modules and capabilities, specifically within the IT Service Management suite of applications.
NewSenior GenAI & Data Engineer System OneSenior GenAI & Data EngineerReston, VA$85,000–$110,000 / yearStrong data engineering expertise, including developing data pipelines, data models, and processing large-scale data. Leverage AWS services such as Amazon Bedrock, AWS Lambda, AWS Glue, and AWS Step Functions for cloud-native development.
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.
Legacy .NET Developer System OneLegacy .NET DeveloperVienna, VAFacilitate user acceptance testing to include developing and executing test cases, test criteria, scenarios, and communication with project teams; ensure acceptance of delivered solutions; validate and document results. • Partner with project teams to plan, coordinate and roll out software change/release to Controlled Testing and Production; obtain required approvals and transition project to production.
NewUI/UX Developer System OneUI/UX DeveloperGaithersburg, MDBachelor’s degree in Computer Science, Software Engineering, or related field with 4–8 years of relevant experience or Master’s degree with 2–6 years of relevant experience. User Experience Optimization: Translate complex workflows into simple, efficient user experiences that improve usability and adoption.
Senior .Net Application Developer (Secret clearance) System OneSenior .Net Application Developer (Secret clearance)Reston, VAExperience as a developer in a software environment that supported more than 10,000 users and a Relational Database Management System (RDBMS) with more than 250 tables and 1 million total rows. Experience with SharePoint, NHibernate, jQuery and JavaScript, AJAX, HTML and CSS, Oracle and SQL Server databases, T4 templates, and even Classic ASP, is also desired.
Mobile Developer System OneMobile DeveloperMerrifield, VAMobile Developers are embedded within cross-functional Agile teams and play a critical role in delivering secure, reliable, and user-friendly digital experiences to millions of members. This role involves technical execution, platform advocacy, and collaboration across disciplines to ensure high-quality mobile solutions aligned with business goals and member needs.
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.
NewSoftware Developer System OneSoftware DeveloperWashington, DC$140,000–$180,000 / yearThis role will work as part of the Sales Engineering team and engage directly with customers on-site, in a hybrid format, or remotely, as required by each customer, including the potential for occasional short-term travel to customer locations across the United States. Successful Software Developer's demonstrate competency in integrating advanced technologies into existing business processes, building new functionality, ensuring successful software deployments, and working closely with customers.
Technical Lead System OneTechnical LeadMcLean, VARemote$140,000–$150,000 / yearEnhance and refactor legacy applications and databases while developing new APIs, services, automation, and cloud-native components using appropriate modern languages and frameworks, including Python, Java, JavaScript/TypeScript, C#/.NET, Go, or comparable technologies. Design, prototype, and productionize AI capabilities such as retrieval-augmented generation, semantic search, document intelligence, classification, summarization, intelligent assistants, and agent-supported workflows when appropriate to the business need.
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.
Senior Full Stack .Net Developer (onsite) System OneSenior Full Stack .Net Developer (onsite)Washington, DCThey will build and maintain powerful web applications using our modern tech stack: NET Core C#, Web API, Angular 16+, Entity Framework, and SQL Server. They will work collaboratively with other developers, QA engineers, and business analysts in our fast-paced Agile environment to deliver software solutions.
Cloud Engineer - Secret Clearance Required System OneCloud Engineer - Secret Clearance RequiredWashington, DC$90–$110 / hourBuild Landing Zone including AWS Organizations, SCPs, account vending, KMS, monitoring stack, and Infrastructure as Code (IaC). System One, and its subsidiaries including Joulé and Mountain Ltd., are leaders in delivering outsourced services and workforce solutions across North America.
Application Integration Engineer System OneApplication Integration EngineerMcLean, VA$130,000 / hourResponsibility 2: Develop, configure, test, and support RESTful APIs, service integrations, messaging flows, data transformation logic, orchestration components, and interface services connecting legacy Java applications with cloud-native or microservices platforms. Requirement 3: Strong proficiency in Java, Spring Boot, RESTful APIs, microservices, and integration patterns, especially between Java applications and modern cloud-native platforms.
Lead AWS Cloud Platform Engineer - IaC / SRE – Preferred TriZetto Facets / Healthcare System OneLead AWS Cloud Platform Engineer - IaC / SRE – Preferred TriZetto Facets / HealthcareReston, VARemote$109.05 / hourThe ideal candidate has a strong background supporting production AWS environments, provisioning infrastructure through code, resolving complex operational issues, and partnering with application teams to deliver secure, scalable, and reliable cloud solutions. This is a hands-on role focused on AWS infrastructure provisioning, production support, troubleshooting, and migration of on-premise applications into AWS and Amazon EKS environments.
Unix/Linux Administrator System OneUnix/Linux AdministratorWashington, DC$150,000 / hourDesign and maintain the enterprise patch and configuration management architecture (Red Hat Satellite, Ansible or Ansible Automation Platform), converting manual administrative work into automated, repeatable, version-controlled workflows. Author and maintain security hardening baselines aligned to CIS Benchmarks and applicable DISA STIGs; own vulnerability scan remediation and support FISMA and NIST SP 800-53 control implementation, POA&M closure, and audit evidence.
IT Engineer - Network Administrator System OneIT Engineer - Network AdministratorMerrifield, VARemoteSystem One, and its subsidiaries including Joulé and Mountain Ltd., are leaders in delivering outsourced services and workforce solutions across North America. Understanding of networking protocols, devices, firewalls, routers, VPNs, and network monitoring tools.
Lead Network Engineer (WAN Design and Implementation) System OneLead Network Engineer (WAN Design and Implementation)Fairfax, VA$100–$120 / hourThis role will manage a team of seven network engineers across multiple time zones, drive technical decisions, and partner closely with customer stakeholders and engineering leadership to ensure successful delivery. Lead the design and implementation of a global Wide Area Network (WAN) and serve as the senior customer-facing technical authority for the program.
Technical Lead / Solution Architect System OneTechnical Lead / Solution ArchitectMerrifield, VAThe ideal candidate brings deep expertise in enterprise architecture, cloud-native platforms, DevSecOps, CI/CD, and large-scale system integrations, along with the ability to influence technical strategy and drive complex transformation initiatives across the organization. We are seeking an experienced Technical Lead / Solution Architect to lead the architecture, design, and implementation of a mission-critical enterprise platform focused on release certification, governance, quality engineering, and operational readiness.
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.