Network Firewall Engineer

Company: CACI
Location: Sterling
Posted on: April 1, 2026

Job Description:

Job Title: Network Firewall 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 * * * The Opportunity : We are seeking a skilled and detail-oriented Network Firewall Technician to support the implementation, configuration, and maintenance of our organization's firewall infrastructure. The ideal candidate will work closely with the network security team to ensure the effective operation and security of our network perimeter defenses . Responsibilities: Assist in the implementation and configuration of firewall systems across various platforms Perform day-to-day firewall administration tasks, including rule updates, policy modifications, and access control list (ACL) management Monitor firewall logs and alerts, responding to, and escalating security incidents as appropriate Conduct regular firewall health checks and performance tuning Assist in troubleshooting network connectivity and security issues related to firewalls Help maintain firewall documentation, including configuration changes and standard operating procedures Participate in firewall upgrade projects and new deployments Assist in conducting periodic firewall rule reviews and clean-up efforts Support the implementation of next-generation firewall features such as IPS and application control Collaborate with other IT teams members to ensure proper integration of firewall systems with other network components Stay current with emerging security threats and firewall technologies Participate in on-call rotation for critical firewall and network security incidents Qualifications: Bachelor's degree in a Technical field or equivalent work experience 10 years of related work experience TS/SCI with Poly Exceptional organizational skills and attention to detail Expert-level knowledge of major firewall platforms (e.g., Palo Alto, Cisco ASA, Forcepoint) Strong understanding of networking protocols, OSI model, and common network architectures Experience with network security and software-defined networking (SDN) concepts Hands-on experience with network security concepts, such as VPNs, NAT, IDS/IPS, and DMZ configurations. Strong understanding of network protocols (TCP/IP, DNS, HTTP, etc.), network routing protocols (OSPF, EIGRP, BGP), and network architectures. Excellent troubleshooting, problem-solving, and analytical skills Strong communication skills, both written and verbal Desired: Industry certifications such as CISSP, CISM, CCNP Security, Palo Alto PCNSE, or equivalent are highly desired. Proficiency in scripting languages (e.g., Python, Bash) for automation and management tasks 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 : There are a host of factors that can influence final salary including, but not limited to, geographic location, Federal Government contract labor categories and contract wage rates, relevant prior work experience, specific skills and competencies, education, and certifications. Our employees value the flexibility at CACI that allows them to balance quality work and their personal lives. We offer competitive compensation, benefits and learning and development opportunities. Our broad and competitive mix of benefits options is designed to support and protect employees and their families. At CACI, you will receive comprehensive benefits such as; healthcare, wellness, financial, retirement, family support, continuing education, and time off benefits. The proposed salary range for this position is: $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.

Keywords: CACI, Sterling , Network Firewall Engineer, IT / Software / Systems , Sterling, Virginia