Senior Network Security Engineer

- Active Top Secret clearance with current or previously held SCI access - Technical certifications: Security+ and at least one platform-specific security certification (PCNSE, Fortinet NSE, or Cisco security certification) - DoD 8140 certification aligned with the 441 Network Operations Specialist role, such as Network+, Security+, Cloud+, SSCP, CASP+, CISSP, or CCNP Security - Over 10 years of experience in network engineering focusing on enterprise network security - Proven expertise in designing, implementing, and managing next-generation firewalls, VPNs, intrusion prevention systems, and network access control platforms - Practical experience in securing network perimeters and internal segments, including policy design, segmentation, and threat mitigation - Operational experience managing firewall rule sets, VPN tunnels, and security policies in mission-critical environments - Hands-on experience with at least one enterprise security platform such as Palo Alto Networks, Fortinet, or Cisco security technologies - Proficient with Cisco ISE and Cisco ASA environments - Experience with IDS and IPS solutions and endpoint configuration hardening in secure environments - Familiarity with Zero Trust architectures and identity-centric network security patterns - Bachelors degree in a technical discipline is preferred, relevant experience may substitute for education - Ability to immediately contribute in a mission-critical operational environment