Senior Network Security/Firewall Detection Engineer

ERG•Indian Head, MD

2d•$140,000 - $170,000•Onsite

About The Position

ERG is seeking a Senior Network Security / Firewall Detection Engineer to provide advanced network defense, threat detection, and boundary protection capabilities across Navy network environments. This role is responsible for configuring and securing network security appliances, analyzing traffic and alerts, and supporting continuous monitoring activities to ensure mission systems remain resilient against evolving cyber threats. This is a fulltime onsite position at the Naval Surface Warfare Center (NSWC) Indian Head. Indian Head, MD, is approximately 30 miles from Washington, DC, 25 miles from Alexandria, VA, and 60 miles from Fredericksburg, VA.

Requirements

Bachelorâs degree in Cybersecurity, Network Engineering, Information Technology, or related field
8+ years of experience in network security engineering, firewall administration, or threat detection
DoD Security+ certification required (IAT Level II)
Strong background in configuring firewalls, IDS/IPS, and other network security technologies
Experience analyzing network traffic, monitoring alerts, and investigating security events
Knowledge of RMF security controls and continuous monitoring processes
Excellent analytical, troubleshooting, and communication skills
Experience managing NIPR/SIPR boundary protection, including Cross Domain Solutions, with familiarity with the Defense Research and Engineering Network (DREN) preferred
Must currently hold or maintain a Department of Defense T5 investigation/privileged access eligibility (T5 (SSBI) clearance)
Must be a U.S. citizen as this position is not eligible for Limited Access Authorizations

Nice To Haves

Experience supporting U.S. Navy or DoD enterprise networks
Familiarity with tools such as ACAS, Splunk, Snort/Suricata, Cisco ASA/Firepower, Fortinet, or Palo Alto platforms
Knowledge of DoD cybersecurity policies, network hardening techniques, and advanced threat detection methods

Responsibilities

Configure and manage firewalls, IDS/IPS platforms, and other network security appliances to ensure effective boundary protection
Analyze network traffic, logs, and security alerts to identify anomalies, potential intrusions, and malicious activity
Respond to security incidents, conducting investigation, containment, and documentation in coordination with cybersecurity teams
Support Risk Management Framework (RMF) activities and contribute to continuous monitoring by maintaining security controls and documentation
Optimize firewall rulesets, detection signatures, and system configurations to enhance network defense capabilities
Collaborate with cybersecurity, network, and system engineering teams to maintain a strong security posture across Navy environments
Maintain detailed technical documentation, including configurations, diagrams, and security response procedures

Benefits

health and dental insurance
life insurance
long-term disability
educational benefits
FSAs
a generous 401k plan
profit sharing
an EAP
11-20 paid vacation days per year
10 paid holidays per year
56 hours or more of sick leave (based on the state you work in) per year (pro-rated for part-time)