Senior Network Engineer

The Digital Modernization Sector at Leidos has an opening for a Senior Network Engineer on the DISA Defense Red Switch Network team in support of an enterprise VoIP management system - GSM-O II contract at Fort Meade, MD . The successful candidate will have a Network Engineering background responsible for the design, documentation, test, deployment and maintenance of the IP network solutions within an enterprise environment on a high‑paced, fast‑moving program. As a Network Engineer, the successful candidate will be a part of a team that interacts with both technical and non‑technical stakeholders, including customers and vendors but primarily with subject matter expert teammates. In this role, the candidate will be a subject matter expert (SME) in all things related to the IP Network technologies, ensuring optimal performance, security, and scalability of WAN and LAN infrastructure across multiple environments (DEV/TEST and Production). The candidate will also provide technical assistance, administer configurations, upgrade software, develop and/or update related documentation, ensure applicable STIGs are applied and documented, conduct and support testing on work performed, recommend enhancements, and troubleshoot and resolve issues associated with the various network components. This position requires U.S. Citizenship and an active TS/SCI. Daily Responsibilities Work closely with DRSN engineers and site personnel for coordinating deployments and maintenance actions. Evaluate system network requirements and make appropriate technical recommendations. Proficiency with Juniper networking devices to include establishing remote management connectivity, updating the operating systems, coordinating and performing verification test (BER or “burn‑in” tests) configuring alarm and system profiles, and configuring/testing various layers of the OSI model. Assist IA personnel regarding network security and SSP maintenance. Ensure that the network configuration meets all IA requirements. Perform installation test and acceptance (IT&A) of network components both directly through the various GUI/CLI or interface systems, by directing and/or facilitating remote testing with on‑site field engineering support. Monitor network performance. Support deployments as required. Expert Knowledge of IP principles Basic Qualifications Bachelor's degree and 12+ years of overall related experience or Master with 10+ years. Specific experience, education and training may be considered in lieu of degree. Experience in remotely configuring networking or transport devices. Ability to map IP addresses and subnets for networking devices or ability to establish in‑band/out of band management connections on transport devices. Ability to interpret network topology diagrams and proposed device configuration changes. Knowledge of configuring, deploying and supporting HAIPE/NSA Type 1 Encryption devices (GD KG175/ViaSat KGs/Airbus EctoCrypt Black) – With element managers such as GemOne, viaSAT VINE, and Chimera. Knowledge configuring network devices with element managers such as Juniper Space, Security Director, Juniper Routing Director, Solarwinds NCM. Security+ Must possess an active Top Secret with SCI eligibility clearance. Must possess current DoD 8570 certification at IAT level II, Security+ ce. Proficiency with Juniper IOS or other IP/transport specific management tools (EMS) and general practices. Basic Linux Administration or command line interface (CLI) and scripting skills. Network Device configuration management skills through tools such as Ansible, Puppet, Chef, or Terraform. Preferred Qualifications Experience managing configurations with Juniper space, Routing Director, or Security Director. Expertise in IP technologies, i.e. Networking architectures and methodologies and Voice Services. Proficiency in at least two or more of the following devices: SONUS SBC, Juniper MX5 routers, Juniper SRX firewalls, Juniper EX switches, SONUS SBCs, KG175, KG250, Ectocrypt Black. Proficiency in at least one of the following tools: SolarWinds or Junos Space. JNCIA or JNCIP. Proficiency with RADIUS, SNMP, and NTP protocols. General knowledge of TLS and PKI. GSMO If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo - because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 - and moving faster than anyone else dares. Original Posting February 24, 2026 Pay Range Pay Range $116,350.00 - $210,325.00 The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law. About Leidos Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $16.7 billion for the fiscal year ended January 3, 2025. For more information, visit Pay and Benefits Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available at Securing Your Data Beware of fake employment opportunities using Leidos’ name. Leidos will never ask you to provide payment‑related information during any part of the employment application process (i.e., ask you for money), nor will Leidos ever advance money as part of the hiring process (i.e., send you a check or money order before doing any work). Further, Leidos will only communicate with you through emails that are generated by the Leidos.com automated system - never from free commercial services (e.g., Gmail, Yahoo, Hotmail) or via WhatsApp, Telegram, etc. If you received an email purporting to be from Leidos that asks for payment‑related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at View email address on click.appcast.io. If you believe you are the victim of a scam, contact your local law enforcement and report the incident to the U.S. Federal Trade Commission. Commitment to Non-Discrimination All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws. #J-18808-Ljbffr