Network Security Engineer

CACI International Inc; Columbia (MD); On-site; USD 120,800 - 265,800; Full time

Benefits offered by this job

Flexible time off

Robust learning resources

Job summary

CACI International Inc is seeking a Senior Network Security Engineer to join our team in Columbia, Maryland. This pivotal role involves designing, evaluating, and securing complex network systems crucial for intelligence operations. The ideal candidate will possess 5+ years of Network Security Engineering experience and an active TS/SCI clearance with Polygraph.

You will lead hardware installations, conduct vulnerability assessments, and ensure compliance with security regulations. CACI focuses on integrity and innovation while providing a culture of trust and growth.

Qualifications

• 5+ years of experience supporting complex SIGINT hardware systems.
• Active NSA TS/SCI with Polygraph required.
• DoD 8570 IAT Level II certification required.

Responsibilities

• Conduct onsite assessments and document network architectures.
• Lead hardware installations across multiple environments.
• Analyze operational data to identify vulnerabilities.

Skills

Network Security Engineering

SIGINT hardware systems

Network architecture

System vulnerabilities analysis

Security documentation

Education

Bachelor's degree in a related technical field

Tools

PCNSA

SNSA

SNSP

Symantec ProxySG 6.7 Technical Specialist

Cisco CCNA or higher

Job description

Job Title: 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.
• 5+ 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

This position is contingent on funding and may not be filled immediately. However, this position is representative of positions within CACI that are consistently available. Individuals who apply may also be considered for other positions at CACI.

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 customer’s 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 a unique flexible time off benefit and have access to robust learning resources to make your ambitions a reality.

A focus on continuous growth.

Together, we will advance our nation's most critical missions, build on our lengthy track record of business success, and find opportunities to break new ground — in your career and in our legacy.

Pay Range

$120,800 - $265,800

CACI is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, pregnancy, sexual orientation, age, national origin, disability, status as a protected veteran, or any other protected characteristic.