Senior Network Security Engineer | Flexible Time Off

CACI; Columbia (MD); On-site; USD 121,000 - 266,000; Full time

Job summary

CACI is seeking a Senior Network Security Engineer to design, evaluate, and secure complex network and hardware systems supporting intelligence operations. You will partner with mission stakeholders and engineering teams to deliver secure, reliable solutions, ensuring government security requirements are met.

The role requires active TS/SCI with Polygraph, 5+ years in network security engineering, and relevant DoD certifications.

Qualifications

• Active clearance TS/SCI with Polygraph.
• 5+ years of Network Security Engineering experience supporting complex SIGINT hardware systems.
• Bachelor’s degree or 5 additional years of experience in lieu of degree.
• DoD 8570 IAT Level II certification.
• At least three of the following certifications: PCNSA, SNSA, SNSP, Symantec ProxySG 6.7 Technical Specialist, Cisco CCNA or higher.

Responsibilities

• Conduct onsite assessments and document current network architectures and mission‑specific requirements.
• Lead and coordinate hardware installations across multiple environments.
• Recommend hardware specifications tailored to unique project needs.
• Support systems engineering teams by modeling and analyzing proposed solutions.
• Design, verify, and implement hardware test interfaces.
• Perform MTBF/MTTR analyses to strengthen reliability and maintainability.
• Analyze operational data to identify system vulnerabilities and performance gaps.
• Evaluate LAN/WAN designs and ensure architectures adhere to mission security needs.
• Research and assess COTS/GOTS technologies to drive mission capability.
• Provide high‑level expertise in network engineering, architecture, and planning.
• Contribute to technical standards, interface specifications, and network troubleshooting.
• Ensure system designs and implementations meet all government security requirements.
• Develop and enhance security documentation for new and existing systems.
• Support wired and wireless network analysis and optimization.
• Conduct vendor comparisons, cost studies, and system scalability assessments.
• Deliver independent evaluations of complex network ecosystems and recommend enhancements.
• Identify and brief system weaknesses with clear, actionable recommendations.

Skills

NSA TS/SCI with Polygraph

Network Security Engineering

DoD 8570 IAT Level II

5+ years experience

Education

Bachelor’s degree or 5 years of related experience in lieu of degree

Tools

PCNSA

SNSA

SNSP

Symantec ProxySG 6.7 Technical Specialist

Cisco CCNA or higher

Job description

CACI is seeking a Senior Network Security Engineer to design, evaluate, and secure complex network and hardware systems supporting intelligence operations. You will partner with mission stakeholders and engineering teams to deliver secure, reliable solutions, ensuring government security requirements are met.

The role requires active TS/SCI with Polygraph, 5+ years in network security engineering, and relevant DoD certifications.