Network Security Engineer

Booz Allen Hamilton; Dahlgren (VA); On-site; USD 69,000 - 158,000; Full time

Job summary

Booz Allen Hamilton seeks a Network Security Engineer to bolster Navy cyber capabilities. You’ll assess vulnerabilities, implement secure architectures, and support RMF/ATO across classified and unclassified environments.

The role blends Linux/Windows system engineering with network security best practices in a mission‑critical setting. Based in Dahlgren, VA, you’ll collaborate with systems engineers, software developers, and cybersecurity experts to plan acquisition, installation, and

Qualifications

• Experience as Linux/Windows OS Systems Engineer/Administrator.
• Experience with HP‑UX, UNIX, Solaris, Linux (RHEL/Ubuntu) and Windows.
• Experience with virtualization technologies (VMware, Hypervisor, KVM).
• Experience applying STIGs and secure configuration standards.
• Knowledge of encryption technologies and VPNs; cross‑domain resolution.

Responsibilities

• Apply TCP/IP, multicast and UDP across network environments.
• Implement DMZ and protective enclaves with firewalls and switches.
• Analyze Windows events, Linux logs and dmesg; recommend mitigations.
• Collaborate with Navy warfare centers to maintain cyber posture.
• Support RMF/ATO planning during system acquisition and configuration.
• Contribute to design reviews and write network/code improvement recommendations.
• Operate Linux (RHEL/Ubuntu) and Windows systems in diverse environments.

Skills

Linux/Windows admin

Virtualization

System hardening

Security monitoring

RMF/ATO knowledge

Education

Bachelor's degree in science

Tools

ACAS

STIG Viewer

Nessus

Job description

Network Security Engineer

The Opportunity: Are you looking for an opportunity to advance your experience in cyber security, networking, and systems engineering that will support the United States Navy? As a network security engineer, you can identify the cyber posture needed to assess vulnerabilities and recommend the best solution and security strategy. We need your experience to develop and implement security solutions that will allow our armed forces to administer modern technologies on tactical and deployed systems in a way that is safe, secure, and hardened while still allowing the overwhelming efficiency that is required for mission success.

On our team, you’ll troubleshoot and analyze complex challenges for customers using your knowledge of network and cyber security best practices, as well as tools and scripting techniques to automate tasks and improve efficiencies. You’ll use your curiosity for technology and market trends to further research and develop security solutions. Using your experience primarily in Red Hat Enterprise Linux, you’ll help assess security threats and implement infrastructure controls. You’ll work with multiple Warfare centers within the Navy to design and maintain a reliable cyber posture across a number of systems that are deployed in classified and unclassified environments. You’ll collaborate with highly skilled systems engineers, software developers, and cybersecurity experts to learn the strategic goals and operational needs of our clients. You’ll then share your expertise during the planning of acquisition, installation, and configuration of Army systems that must maintain an Authority to Operate (ATO) via the Risk Management Framework (RMF) process. In this role, you’ll closely impact the mission's areas by assessing mission objectives and providing cyber security solutions that coincide with mission parameters.

This position is located in Dahlgren, VA.

What You’ll Work On:

• Apply the Transmission Control Protocol/Internet Protocol (TCP/IP) including multicast and UDP.
• Implement a Demilitarized Zone (DMZ).
• Apply and configure firewalls and switches to system architectures to define and protect enclaves.
• Analyze Windows Events and Linux syslogs, boot logs, and dmesg logs.
• Recommend network modifications to systems to mitigate known vulnerabilities.
• Develop and use or analysis models to support cybersecurity objectives.
• Operate and administrate computer systems running HP-UX, UNIX, Solaris, Linux including RHEL or Ubuntu, and Microsoft Windows.
• Apply STIGs.
• Apply virtual hosting and server technology in system architectures.
• Apply the concept of deceptive technology such as honeypots in system architectures.
• Participate in Design Reviews.
• Author recommendations for improving network and code design.
• Contribute to a System Security Administrator and Operators Manual (SSAOM).

You Have:

• Experience as a Linux and Windows OS as Systems Engineer or Administrator
• Experience with HP-UX, UNIX, Solaris, Linux such as RHEL or Ubuntu, and Microsoft Windows OS
• Experience with virtualization technologies such as VMWare, Hypervisor, and KVM
• Experience applying STIGs
• Knowledge of how to implement approved encryption technologies, Virtual Private Networks (VPNs), and resolve Cross Domain issues
• Knowledge of system hardening and security best practices, and networking concepts including IPv4, SSH, and Firewalls
• Knowledge of monitoring and cyber security tools including ACAS Security Center, Evaluate STIG, STIG Viewer, and Nessus Scanner
• Secret clearance HS diploma or GED Security+ ce, CySA+, GSEC, SSCP, CND, GICSP, or RHCSA Certification

Nice If You Have:

• Experience with CI/CD pipelines and DevSecOps practices
• Experience with threat intelligence platforms and incident response frameworks
• Bachelor's degree in science

Compensation

At Booz Allen, we celebrate your contributions, provide you with opportunities and choices, and support your total well‑being. Our offerings include health, life, disability, financial, and retirement benefits, as well as paid leave, professional development, tuition assistance, work-life programs, and dependent care. Our recognition awards program acknowledges employees for exceptional performance and superior demonstration of our values. Full-time and part-time employees working at least 20 hours a week on a regular basis are eligible to participate in Booz Allen’s benefit programs. Individuals that do not meet the threshold are only eligible for select offerings, not inclusive of health benefits. We encourage you to learn more about our total benefits by visiting the Resource page on our Careers site and reviewing Our Employee Benefits page. Salary at Booz Allen is determined by various factors, including but not limited to location, the individual’s particular combination of education, knowledge, skills, competencies, and experience, as well as contract-specific affordability and organizational requirements. The projected compensation range for this position is $69,300.00 to $158,000.00 (annualized USD). The estimate displayed represents the typical salary range for this position and is just one component of Booz Allen’s total compensation package for employees. This posting will close within 90 days from the Posting Date.

Identity Statement

As part of the hiring process, we will ask you to complete an identity verification process that leverages advanced biometrics and artificial intelligence to ensure authenticity and protect against identity fraud. You are expected to be on camera during interviews and assessments. We reserve the right to take your picture to verify your identity and prevent fraud.

Candidate AI Usage Policy

AI is a part of our daily work at Booz Allen, and we are committed to the responsible and ethical use of AI tools. However, we want to ensure a fair candidate process based on your own skills and knowledge. As part of this commitment, the use of artificial intelligence (AI) or other tools to assist with responses during interviews (whether in‑person or virtual) is prohibited unless permission is explicitly provided.

Work Model

Our people‑first culture prioritizes the benefits of collaboration. To support engagement and effective communication, employees working virtually are generally expected to have their cameras on during meetings. Remote: If this position is listed as remote, there may still be occasions when you are required to work in person at a Booz Allen or customer facility. Hybrid: If this position is listed as hybrid, you will be expected to work from a Booz Allen or customer facility, in alignment with your leadership’s expectations and the needs of the role. Onsite: If this position is listed as onsite, work will primarily be performed full‑time at a customer facility, where employees will collaborate directly with colleagues and customers as required by the role.

Commitment to Non‑Discrimination

All qualified applicants will receive consideration for employment without regard to disability, status as a protected veteran or any other status protected by applicable federal, state, local, or international law.

Commitment to Non‑Discrimination

All qualified applicants will receive consideration for employment without regard to disability, status as a protected veteran or any other status protected by applicable federal, state, local, or international law.

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