Network Engineer

Description We are seeking a Network Engineer to support the design, administration, documentation, and cybersecurity of enterprise and tactical network infrastructures supporting Department of Defense (DoD) systems. The successful candidate will be responsible for maintaining network architecture documentation, administering network devices, implementing secure network solutions, and ensuring compliance with cybersecurity and accreditation requirements. This position requires both hands‑on network engineering expertise and the ability to develop comprehensive technical documentation supporting system design reviews and Risk Management Framework (RMF) activities. There are 2 openings for this role. Full-time Key Responsibilities Develop, maintain, and update the Network Design Document (NDD) to accurately reflect current network architectures and planned system modifications. Document significant network design changes and ensure all updates are aligned with system requirements, engineering baselines, and cybersecurity objectives. Develop and maintain network configuration artifacts using GitLab version control, ensuring proper configuration management and traceability. Create, update, and maintain the system Boundary Diagram, accurately documenting network boundaries, trust zones, interfaces, and internal connections to support cybersecurity assessments and authorization activities. Collaborate with system engineers, cybersecurity personnel, and software development teams to ensure network documentation remains accurate throughout the system lifecycle. Configure, administer, and troubleshoot enterprise network infrastructure, including routers, switches, firewalls, VPNs, VLANs, routing protocols, and network segmentation technologies. Deploy, configure, and maintain new network hardware and supporting infrastructure as required. Evaluate existing network security controls and implement enhancements to improve system security, performance, and resiliency. Perform network performance analysis, capacity planning, and troubleshooting to maintain reliable system operations. Support implementation of secure network architectures consistent with DoD cybersecurity policies, RMF requirements, DISA STIGs, and applicable security controls. Participate in engineering design reviews, configuration control boards, cybersecurity assessments, and accreditation activities. Maintain accurate network inventories, diagrams, and technical documentation supporting system sustainment and lifecycle management. Coordinate with multidisciplinary engineering teams to integrate network solutions supporting mission requirements. Requirements 5+ years of experience designing, administering, and supporting enterprise network environments. Experience configuring and managing: Layer 2 and Layer 3 switches, Enterprise routers, Firewalls, VPN technologies, VLANs, Network segmentation, Routing protocols (OSPF, BGP, EIGRP or similar). Experience maintaining technical network documentation, including network diagrams, architecture documents, and design documentation. Experience utilizing GitLab or similar version control systems for managing network configurations and documentation. Strong understanding of TCP/IP networking, DNS, DHCP, routing, switching, and network troubleshooting. Experience supporting DoD cybersecurity requirements, including RMF, STIG implementation, vulnerability remediation, and system accreditation. Familiarity with enterprise network monitoring and diagnostic tools. Ability to communicate effectively with engineers, cybersecurity personnel, program management, and government stakeholders. Bachelor's degree in Computer Science, Information Technology, Network Engineering, Cybersecurity, or a related technical discipline (or equivalent combination of education and relevant experience). Must have or be able to obtain a CompTIA Security+. Must be a U.S. Citizen. Ability to obtain and obtain a security clearance. About TRISTAR TRISTAR is an SBA certified Service‑Disabled Veteran‑Owned professional services company supporting the U.S. Department of War programs. Our core competencies include Electronic Warfare, Enterprise Management, Full Spectrum Cybersecurity, Information Technology, Digital Transformation, Software Engineering and Development, Maritime Modernization and Engineering, and Technical Solutions. TRISTAR was founded in March 1995 and has built an employee‑focused collaborative environment which enables our team of professionals to create and deliver customized solutions to meet our customers' mission critical challenges. TRISTAR's core capabilities support customers with end‑to‑to‑end solutions. For over 30 years, TRISTAR has demonstrated and perfected our ability to successfully manage any task, small or large no matter how difficult or complex. TRISTAR is proud to serve the Department of War and other Federal Agencies. TRISTAR provides equal employment opportunities to all employees and applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state or local laws. This policy applies to all terms and conditions of employment, including recruiting, hiring, placement, promotion, termination layoff, recall, transfer, leaves of absence, compensation and training. #J-18808-Ljbffr