Senior Principal Cyber Network Engineer (TS/SCI Eligible)

Northrop Grumman in Chantilly, VA is seeking a Principal or Senior Principal Cyber Network Engineer to monitor, maintain, and support a mission-critical network infrastructure. Responsibilities include upgrading, documenting, and analyzing network systems with cross-team collaboration. The role requires TS clearance with SCI eligibility and the ability to obtain a poly, plus hands-on experience with RMF/ATO and network security practices. Strong Cisco/Juniper proficiency is essential.