Network Engineer

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MANTECH seeks a skilled and security-focused Network Engineer to support the Cryptographic Solutions Program within the National Security Systems domain in Linthicum Heights, MD.

This opportunity allows you to directly contribute to national defense by securing critical communication infrastructures used by the Department of Defense and Intelligence Community. In this role, you will help design, implement, and safeguard cryptographic networks that ensure data protection, compliance, and mission assurance across highly sensitive environments.

• Implement encryption protocols (e.g., SSL/TLS, IPsec) to safeguard data in transit
• Configure and secure firewalls, routers, and switches within classified environments
• Monitor network performance and identify anomalies using advanced diagnostic tools
• Troubleshoot cryptographic implementations and resolve connectivity issues
• Maintain and update cryptographic systems to address known vulnerabilities
• Conduct technical risk assessments to evaluate network infrastructure threats
• Analyze existing cryptographic methods and recommend enhancements or alternatives
• Collaborate with cybersecurity professionals to meet compliance and certification requirements
• Develop and maintain comprehensive documentation of network architecture, policies, and procedures

• Bachelor’s degree in Network Engineering, Systems Engineering, Information Technology, or related field and 3 years of relevant experience; OR Master’s degree in a related field and 1 year of relevant experience; OR 8 years of relevant experience may be substituted for degree
• Proficiency in securing and troubleshooting core network protocols and components
• Experience with Nessus, and system administration across Linux/Windows environments
• Understanding of network security principles including segmentation and monitoring
• CompTIA Security+ certification or equivalent industry credential

• Background in cryptographic engineering or cybersecurity analysis
• Familiarity with certification and accreditation processes for secure systems
• Experience supporting DoD or Intelligence Community infrastructure programs

• Must possess a current and active TS/SCI with Polygraph

• Must be able to remain in a stationary position 50% of the time
• Occasionally move about inside the office to access file cabinets, office machinery, or to communicate with co-workers, management, and customers, via email, phone, and/or virtual communication, which may involve delivering presentations

• Mid-Senior level

• Full-time

• Information Technology
• IT System Data Services

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