Senior Network Security Engineer

CACI International; New York (NY); On-site; USD 140,000 - 180,000; Full time

Job summary

CACI International 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, engineers, and technical teams to deliver secure, reliable, and innovative solutions.

This role emphasizes hands-on assessment, hardware installation leadership, vulnerability analysis, and compliance with government security requirements.

Qualifications

• Active NSA TS/SCI with Polygraph required.
• 8+ years of network security engineering for complex SIGINT hardware.
• Bachelor's degree or 5 years of experience in lieu of degree.
• DoD 8570 IAT Level II certification.
• At least three of the listed certifications: PCNSA, SNSA, SNSP, Symantec ProxySG 6.7, 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 project needs.
• Support systems engineering teams by modeling and analyzing proposed solutions.
• Design, verify, and implement hardware test interfaces.
• Perform MTBF/MTTR analyses to improve reliability.
• Analyze operational data to identify vulnerabilities and performance gaps.
• Evaluate LAN/WAN designs to meet mission security needs.
• Research and assess COTS/GOTS technologies for mission capability.
• Provide high-level expertise in network engineering, architecture, and planning.
• Develop security documentation for new and existing systems.
• Ensure designs meet government security requirements.

Skills

Network security engineering

Threat analysis

Security collaboration

Education

Bachelor's degree or 5 years experience

5+ years alternative experience

Tools

PCNSA

SNSA

SNSP

Symantec ProxySG 6.7

Cisco CCNA or higher

Job description

Job Title: Senior Network Security Engineer

Job Category: Information Technology

Time Type: Full time

Minimum Clearance Required to Start: TS/SCI with Polygraph

Employee Type: Regular

Percentage of Travel Required: Up to 10%

Type of Travel: Local

* * *

Senior Network Security Engineer – Advance the Mission with CACI!

At CACI, we don't just work on technology, we deliver solutions that strengthen national security and empower critical missions around the world. We're looking for an experienced Senior Network Security Engineer who is ready to bring deep technical expertise, curiosity, and a commitment to excellence to our high-impact programs.

In this role, you'll play a pivotal part in designing, evaluating, and securing complex network and hardware systems that support vital intelligence operations. You will partner with mission stakeholders, engineers, and technical teams to deliver secure, reliable, and innovative solutions that keep our customers a step ahead.

If you're driven by purpose, inspired by challenge, and ready to grow your career in an environment built on integrity and innovation, CACI is the place to make your mark.

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.

Qualifications:

Required:

• An active NSA TS/SCI with Polygraph.
• 8+ years of Network Security Engineering experience supporting complex SIGINT hardware systems.
• Bachelor's degree in a related technical field, 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

What You Can Expect:

A culture of integrity.

At CACI, we place character and innovation at the center of everything we do. As a valued team member, you'll be part of a high-performing group dedicated to our customers' missions and driven by a higher purpose - to ensure the safety of our nation.

An environment of trust.

CACI values the unique contributions that every employee brings to our company and our customers - every day. You'll have the autonomy to take the time you need through