{"id":3334037,"url":"https://alion.io/job/northrop-grumman-network-engineer-level-3-or-4","title":"Network Engineer - Level 3 or 4","company":{"id":12494,"name":"Northrop Grumman","domain":"northropgrumman.com","url":"https://alion.io/company/northropgrumman","size_band":"5000+","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Workday","truth_index":{"grade":"B","score":81,"open_postings":476,"ghost_share":0.002,"stale_share":0.729,"repost_share":0.013,"time_to_fill_p50_days":25,"computed_at":"2026-10-29T05:49:05Z"}},"role":"Networking","role_family":"Networking","seniority":"staff","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":94200,"max":141200,"currency":"USD","period":"year","gross":null,"usd_annual":141200},"salary_estimate":null,"experience_years_min":12,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"BGP","optional":false},{"name":"DNS","optional":false},{"name":"OSPF","optional":false},{"name":"TCP/IP","optional":false},{"name":"Linux","optional":true},{"name":"Tcpdump","optional":true},{"name":"Wireshark","optional":true}],"status":"closed","first_seen_at":"2026-10-26T00:00:00Z","employer_posted_date":"2026-10-26","last_verified_at":"2026-10-29T16:38:09Z","board_verified":false,"closed_at":"2026-10-29T16:38:09Z","days_open":3,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":3},"description":"RELOCATION ASSISTANCE: Relocation assistance may be availableCLEARANCE REQUIRED FOR START: YesCLEARANCE TYPE: Top SecretTRAVEL: Yes, 10% of the TimeDescription\nAt Northrop Grumman, our employees have incredible opportunities to work on revolutionary systems that impact people's lives around the world today, and for generations to come. Our pioneering and inventive spirit has enabled us to be at the forefront of many technological advancements in our nation's history - from the first flight across the Atlantic Ocean, to stealth bombers, to landing on the moon. We look for people who have bold new ideas, courage and a pioneering spirit to join forces to invent the future, and have fun along the way. Our culture thrives on intellectual curiosity, cognitive diversity and bringing your whole self to work - and we have an insatiable drive to do what others think is impossible. Our employees are not only part of history, they're making history.Northrop Grumman Space Systems, Multi-Domain Operations, and Missile Defense Integration Business Unit (BU) has an exciting career opportunity for a Network Engineer - Level 3 or 4 to join our team of qualified, diverse individuals. This position will be at Schriever Space Force Base (SSFB) in Colorado Springs, CO.\nPosition Overview:\nThe selected Network Engineer - Level 3 or 4 will play a crucial role in the BMDS OPIR Architecture, Enterprise Sensor Lab, and Persistent Infrared Testbed Network and Infrastructure teams, assisting senior system administrators and network subject matter experts (SME’s) in managing and sustaining network components vital to the operations of associated support networks, both classified and unclassified.\nEssential Functions:\nKnowledge of network architecture, engineering, design, implementation, and testing.\nUnderstanding of network communication protocols and routing protocols (BGP, OSPF, and EIGRP) and IP network troubleshooting.\nKnowledge of network testing methodologies using routers, switches, and firewalls.\nKnowledge of TCP/IP behavior, network communications and routing protocols, network traffic analysis, and troubleshooting experience.\nMust be an effective communicator with excellent writing and presentation skills using Microsoft PowerPoint and Visio drawing tools.\nSupport and maintain the networks of high-availability systems\nSupport occasional after-hour program activities and operational testing.\nSeeking candidates who find satisfaction in working on challenging and diverse assignments in collaborative settings across all levels.\nThis requisition may be filled at a higher grade based on qualifications listed below.\nThis requisition may be filled at either a Principal Network Engineer - Level 3 or a Senior Principal Network Engineer - Level 4.\nBasic Qualifications:\nPlease note your updated and current security clearance level and IAT/relevant certifications on your resume if applicable.\n Principal Network Engineer - Level 3: Bachelor’s Degree in a STEM (Science, Technology, Engineering or Mathematics) discipline preferred from an accredited university and 5 years of related experience or a Master’s degree in STEM and 3 years of related experience, or 1 year with a PhD.; or 9 years of relevant work experience may be considered as an alternative to a degree.\n Sr.Principal Network Engineer - Level 4: Bachelor’s Degree in a STEM (Science, Technology, Engineering or Mathematics) discipline preferred from an accredited university and 8 years of related experience or a Master’s degree in STEM and 6 years of related experience, or 4 year with a PhD.; or 12 years of relevant work experience may be considered as an alternative to a degree.\nApplicants must possess a current DoD 8140 certification at IAT Level II or higher (Security+, GSEC, SCNP, SSCP, CISSP, CISA, GSE, SCNA)\nMust be able to work collaboratively in a team environment with other highly motivated network engineers.\nFamiliarity with network communication products, including routers, switches, firewalls, Domain Name Servers (DNS), and data encryption products.\nAbility and willingness to travel up-to 10% to support business needs.\nApplicants must have a current active in-scope U.S. Government issued Top Secret security clearance with SCI eligibility at the time of application, which is required to start.\nPossess a counter-intelligence polygraph test or willingness to undergo a counter-intelligence polygraph test.\nPreferred Qualifications:\nExpertise on Cisco catalyst and Nexus switches\nWorking with HA configurations on switches and firewalls.\nFirewall configuration (creating access policies, NATing, troubleshooting) \nTroubleshooting complex connection issues using various tools. (trace route, ping, netcat, netstat, tcpdump, firewall logs, live packet captures, Wire Shark)\nCreating and maintaining topologies with Visio\nDocumenting and implementing network device STIGs\nBasic Linux navigation\nCisco ISE administration\nExperience with static and multicast routing\nPrimary Level Salary Range: $94,200.00 - $141,200.00Secondary Level Salary Range: $117,500.00 - $176,300.00The above salary range represents a general guideline; however, Northrop Grumman considers a number of factors when determining base salary offers such as the scope and responsibilities of the position and the candidate's experience, education, skills and current market conditions.Depending on the position, employees may be eligible for overtime, shift differential, and a discretionary bonus in addition to base pay. Annual bonuses are designed to reward individual contributions as well as allow employees to share in company results. Employees in Vice President or Director positions may be eligible for Long Term Incentives. In addition, Northrop Grumman provides a variety of benefits including health insurance coverage, life and disability insurance, savings plan, Company paid holidays and paid time off (PTO) for vacation and/or personal business.The application period for the job is estimated to be 20 days from the job posting date. However, this timeline may be shortened or extended depending on business needs and the availability of qualified candidates.Northrop Grumman is an Equal Opportunity Employer, making decisions without regard to race, color, religion, creed, sex, sexual orientation, gender identity, marital status, national origin, age, veteran status, disability, or any other protected class. For our complete EEO and pay transparency statement, please visit http://www.northropgrumman.com/EEO. 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