Network Engineer

TRISTAR INC • Bloomington, IN

1d

About The Position

TRISTAR is seeking a Network Engineer in Bloomington, Indiana, to support the design, administration, documentation, and cybersecurity of enterprise and tactical network infrastructures supporting Department of Defense systems. The role maintains network architecture documentation, administers network devices, implements secure network solutions, and supports compliance with cybersecurity and accreditation requirements. It combines hands-on network engineering with technical documentation for system design reviews and Risk Management Framework activities.

Requirements

• Bachelor's degree in Computer Science, Information Technology, Network Engineering, Cybersecurity, or a related technical discipline, or an equivalent combination of education and relevant experience.
• At least 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, and routing protocols such as OSPF, BGP, or EIGRP.
• Experience maintaining network technical documentation, including diagrams, architecture documents, and design documentation.
• Experience using GitLab or similar version control systems to manage 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.
• Must have or be able to obtain CompTIA Security+ before the start date.
• Must be a U.S. citizen.
• Ability to obtain and maintain a security clearance.

Responsibilities

• Develop, maintain, and update the Network Design Document to reflect current network architectures and planned system modifications.
• Document significant network design changes and align updates with system requirements, engineering baselines, and cybersecurity objectives.
• Develop and maintain network configuration artifacts using GitLab version control for configuration management and traceability.
• Create and maintain the system Boundary Diagram, documenting network boundaries, trust zones, interfaces, and internal connections for cybersecurity assessments and authorization activities.
• Collaborate with system engineers, cybersecurity personnel, and software development teams to keep network documentation 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.
• Evaluate network security controls and implement enhancements to improve security, performance, and resiliency.
• Perform network performance analysis, capacity planning, and troubleshooting to maintain reliable system operations.
• Support 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 network inventories, diagrams, and technical documentation for system sustainment and lifecycle management.
• Coordinate with multidisciplinary engineering teams to integrate network solutions supporting mission requirements.

What This Job Offers

• Job Type: Full-time