Senior Cybersecurity Engineering Specialist - Guard Engineer

High Speed Guard Engineer

Location:

Springfield, VA

We are seeking a High Speed Guard (HSG) Engineer to support the implementation, administration, and sustainment of Cross Domain Solutions (CDS) operating across multiple networks and security domains. This role supports enterprise transport and cybersecurity services, including design, engineering, implementation, operations, and sustainment of mission‑critical systems in a complex, multi-domain environment.

• Gather and analyze technical requirements from stakeholders to determine optimal implementation approaches
• Schedule and participate in Technical Exchange Meetings (TEMs) to design and whiteboard architecture and implementation details
• Coordinate implementation plans and timelines with engineering and project management teams
• Respond to and resolve service outages, system issues, and technical inquiries
• Install and manage firmware updates on physical infrastructure components (e.g., servers, storage, switches)
• Monitor, troubleshoot, and optimize performance of high-speed guard and content inspection platforms
• Engineer, design, and implement High Speed Guard rulesets and policies to enforce cross-domain data transfer requirements

• Active TS/SCI security clearance
• Ability to successfully pass and maintain a Government polygraph (post‑hire requirement)
• Bachelor's degree in a technical discipline and six (6) years of relevant experience
• DoD 8570/8140 IAT Level II certification
• Hands‑on experience with High Speed Guard (HSG) technologies

• Experience working with Cross Domain Solutions (CDS) in operational environments
• Experience engineering or supporting systems using a total systems engineering approach
• Proficiency with Linux operating systems, including:
  • General OS security practices
  • TCP/IP networking fundamentals
  • Network and system security concepts

SITEC is an employee‑and customer‑focused Information Technology and Professional Services firm specializing in the design, development, and delivery of state‑of‑the‑art technology solutions. Our expertise spans cybersecurity, software engineering, and systems engineering in support of mission‑critical government programs.

We provide full life‑cycle support to our customers, including continuous operations for Software Support Activities and Software Production Facilities. At SITEC, our people are our greatest asset, and we are committed to fostering an environment where technical excellence, innovation, and professional growth thrive.