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# Sr. Principal Network Engineer (AHT)

- **Company:** Northrop Grumman
- **Location:** Colorado Springs, CO, United States
- **Experience:** Expert
- **Salary:** $117,500.0 - $176,300.0
- **Contract:** Permanent contract
- **Skills:** Secure Shell (SSH), Microsoft Windows, Border Gateway Protocol, Network Analysis, Cisco IOS, CompTIA Security+, System Configuration, Linux, Domain Name System (DNS), Enhanced Interior Gateway Routing Protocol, Networking Hardware, Internet Protocol Security (IP SEC), IPv4, IPv6, Subnetting, Virtual Private Networks (VPN), Network Troubleshooting, Load Testing, Multicasting, Network Planning and Design, Network Administration, Cisco Nexus Switches, Open Shortest Path First (OSPF), Simple Network Management Protocols, Syslog, Terminal Access Controller Access-Control System (TACACS), Virtual Local Area Networks, Network Simulation, Network Routers, Multiplexers, Enterprise Software Applications, Firewalls (Computer Science), Computer Equipment, Routing & Switching, Firepower, TACACS+ Protocol, Communication Devices, Cisco
- **Published:** September 19, 2026
- **Apply:** https://www.clearancejobs.com/jobs/9179540/sr-principal-network-engineer-aht

## About the Role

* Minimum of 8 Years with Bachelor's Degree; 6 Years with Masters; additional years of experience in lieu of a degree
 * Active DoD Secret security clearance
 * Active DoD 8140 approved IAT Level II (or higher) compliant certification. Examples include: CCNA Security, CompTIA Security+, Security+CE, CCNP, and CISSP
 * Understanding of IPv4/IPv6 and network design, including IP subnetting and protocols including BGP, OSPF and EIGRP
 * Familiar with network management protocols, like SNMP, SSH, syslog, RADIUS/TACACS and network simulation tools and load testing (e.g. CML, GNS3)
 * Understanding of communication architecture and communication hardware
 * Experience with, and knowledge of, Cisco IOS and Cisco Nexus Operating systems
 * Experience with Cisco appliances, specifically Firepower firewalls and TACACS+ services
 * Intimate knowledge and experience designing, maintaining, and troubleshooting Network switching and routing protocols.
 * Ability to travel up to 10%
 * Ability to work off-shift hours to support the mission if needed

Preferred Qualifications:

 * Experience in deploying, configuring, and security hardening Cisco Network Devices
 * In depth understanding of IPV4 Network sub/super netting, CIDR, and DNS
 * Understanding of advanced features like GRE, IPSEC, IP quality-of-service, VLANs, and multicast
 * Experience with WAN operations and protocols
 * Experience with Linux and Windows operating systems

## Description

Northrop Grumman Defense Systems is seeking a self-motivated, energetic individual to work at our Colorado Springs, CO location as a Senior Principal Network Engineer supporting the JTAGS program. As a member of this team, you will focus primarily on the design, installation and configuration, and sustainment of network products: switches, routers and firewalls. Installation activities include initial setup following standard configuration guidelines, security hardening, cabling, labelling, documentation and checkout. Ongoing tasks include problem resolution, firewall changes, connection additions, and monitoring.

The candidates will be responsible for (but not limited to) the following tasks:

 * Maintain smooth operation of local area, worldwide and virtual private networks (VPN)
 * Plan, evaluate, and coordinate installation and/or reconfiguration of hardware and software elements of data and/or voice communication network
 * Maintain technical expertise in all areas of networks and computer hardware and software interconnection and interfacing, such as routers, multiplexers, firewalls, hubs, bridges, gateways, etc.
 * Propose solutions to management to ensure all communications requirements based on future needs and current usage, configuring such solutions to optimize cost savings
 * Prepare or ensure that appropriate network documentation exists, including operational instructions
 * Provide regular monitoring and network analysis regarding short- and long-range planning for in-house systems
 * Coordinate third-party maintenance for network equipment
 * Design network or portion of network that include selection of hardware and software packages