Network Security Engineer

Network Security Engineer

Job Location s: US-MD-Rockville

Requisition :

Position Category:
Information Technology

Clearance:
Agency Clearance

We are seeking a skilled Network Security Engineer to design, implement, maintain, and support our network security infrastructure. In this role, you will ensure that our network-on-premises, cloud, and hybrid- is safe, resilient, and compliant with industry standards and internal policies. You will collaborate with IT, security, and operations teams to protect critical assets, monitor threats, and respond to security incidents.

• Design and deploy network security solutions, including firewalls, VPNs, IDS/IPS, and access controls.
• Configure and manage network devices (routers, switches, load balancers) and security appliances in on-premises and cloud environments.
• Monitor network traffic and security logs, identify anomalies or suspicious events, and escalation as needed.
• Perform vulnerability assessments and penetration testing on network infrastructure; recommend remediation steps.
• Troubleshoot and resolve network & security issues (e.g., connectivity, routing, firewall rules, VPN failures).
• Develop and maintain network security policies, procedures, and technical documentation.
• Ensure all network and security changes follow configuration management and change control processes.
• Maintain up-to-date knowledge of network/security technologies, threats, and regulatory requirements.
• Provide support for incident response: investigation, root cause analysis, containment, and recovery of network security events.
• Collaborate with cross-functional teams (IT operations, cloud, applications, compliance) to drive security best practices.

• Bachelor's degree and 8 years of experience or 12 years of experience and a HS Diploma / Equivalent.
• Hands‑on experience in network engineering, network security, or a closely related discipline.
• In‑depth knowledge of TCP/IP, routing & switching, VLANs, NAT, VPNs, firewalls, IDS/IPS, and network protocols.
• Experience configuring and managing security devices and tools (firewalls, VPN appliances, intrusion detection / prevention).
• Strong analytical and troubleshooting skills - ability to interpret network traffic, logs, and packet captures.
• Excellent communication skills, both written and verbal, to work with technical and non‑technical stakeholders.
• Must be a US Citizen.
• Must be able to obtain and maintain the required agency clearance.

• Certifications such as CISSP, CCNP Security, PCNSE, CEH.
• Experience with cloud networking and security (AWS, Azure, GCP).
• Familiarity with network automation/scripting (e.g., Python, Ansible).
• Experience working in a 24O7 operations environment and handling incident/on‑call duties.
• Understanding of regulatory frameworks and compliance requirements (e.g., PCI‑DSS, HIPAA, NIST).

Peraton is a next‑generation national security company that drives missions of consequence spanning the globe and extending to the farthest reaches of the galaxy. As the world's leading mission capability integrator and transformative enterprise IT provider, we deliver trusted, highly differentiated solutions and technologies to protect our nation and allies. Peraton operates at the critical nexus between traditional and nontraditional threats across all domains: land, sea, space, air, and cyberspace.

The company serves as a valued partner to essential government agencies and supports every branch of the U.S. armed forces. Each day, our employees do the can't be done by solving the most daunting challenges facing our customers. Visit  to learn how we're keeping people around the world safe and secure.

$86,000 - $138,000. This represents the typical salary range for this position. Salary is determined by various factors, including but not limited to, the scope and responsibilities of the position, the individual's experience, education, knowledge, skills, and competencies, as well as geographic location and business and contract considerations. Depending on the position, employees may be eligible for overtime, shift differential, and a discretionary bonus in addition to base pay.

EEO:
Equal opportunity employer, including disability and protected veterans, or other characteristics protected by law.