Network Engineer

SMS is seeking a Network Engineer with an active TS clearance Network Engineer to manage mission-critical voice and data networks for our Air Force District of Washington / National Capital Region (AFNCR) contract. The Network Engineer will support mission-critical network infrastructure within a secure federal environment. This role is focused on the design, implementation, administration, troubleshooting, and sustainment of enterprise network systems. The ideal candidate will bring strong hands-on experience with routing, switching, firewalls, network security, performance monitoring, and documentation while supporting highly available and secure network operations.

Since 1976, SMS has specialized in modernizing legacy IT and sustaining complex enterprise environments for federal agencies. With the goal of building long-term partnerships with our customers, we invest in our employees by providing the training, tools, and support they need to keep critical missions operational, improve performance, and reduce risk. SMS is headquartered in McLean, Virginia, with offices and on-site operations at customer locations throughout the United States. For additional information on SMS, visit .

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Job Responsibilities

• Infrastructure Support: Design, configure, and maintain LAN, WAN, routing, switching, and firewall systems.
• Specialized Systems: Engineer and maintain secure telecommunication and command-and-control systems like the Defense Red Switch Network (DRSN) within the National Military Command Center (NMCC).
• Operations & Maintenance: Monitor network health, execute upgrades, perform patching, and resolve complex latency or connectivity faults.
• Compliance: Implement DoD cybersecurity mandates, including DISA Security Technical Implementation Guides (STIGs) and Risk Management Framework (RMF) guidelines.
• Documentation: Create architecture diagrams, standard operating procedures (SOPs), and change-management implementation plans.

Required Qualifications

• Security Clearance: Active DoD Top Secret clearance.
• Required to pass drug testing prior to start and randomly through the year
• Certifications:
  • DoD 8570 / 8140 compliance (e.g., CompTIA Security+CE baseline)
  • Active CCNA
• Bachelor's Degree
• 8 years of relevant experience
• Technical Background: Senior-level hands-on experience supporting enterprise network engineering, network operations, or infrastructure engineering in federal, defense, intelligence, or similarly secure environments.

SMS is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or status as a protected veteran.