> Markdown version of [/jobs/ext/2150763-sr-network-engineer-ts-sci-poly-sp-onsite-hanover-md](https://www.wearedevelopers.com/jobs/ext/2150763-sr-network-engineer-ts-sci-poly-sp-onsite-hanover-md). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Sr. Network Engineer / TS/SCI Poly SP / Onsite: Hanover, MD - **Company:** Lockheed Martin - **Location:** Hanover, MD, United States - **Experience:** Expert - **Salary:** $95,900.0 - $178,100.0 - **Contract:** Permanent contract - **Skills:** Microsoft Windows, Business Analytics Applications, Software Applications, CompTIA Security+, Information Systems, Linux, Networking Hardware, IP Addressing, Subnetting, OSI Models, System Center Configuration Manager, Windows Servers, Network Architecture, Reverse Engineering, Security Content Automation Protocol, Software Deployment, Software Engineering, Storage Virtualization, Systems Integration, VCloud, Virtualization Technology, VMware VSphere, Windows Desktop, Network Routers, VRealize, Firewalls (Computer Science), Information Technology, Vcenter, Nessus, Splunk, Network Server, Wsus, Vmware - **Published:** August 20, 2026 - **Apply:** https://www.careerjet.com/job/usbb5053f71cecf0663fd73e02bd728d6a/eaa ## About the Role * Active TS/SCI w/Poly SP Required * U.S. Citizen Required * Current CompTIA Security+ certification or Higher DoD 8572 qualified certificate within the first 60 days of employment (or ability to obtain) * Confident in OSI model, IP addressing and subnetting * Bachelor's degree in Computer Science, Information Technology, or a related field (or equivalent exper) * 5+ years of experience in network engineering and IT support. * 2+ years of Windows OS experience * Experience with Risk Management Framework (RMF) Requirements * Ability to multitask in a fast-paced environment. * Self-motivated, able to work independently, and takes initiative. * Outstanding attention to detail. * Excellent verbal, written communication, and negotiations skills. * Excellent problem solving/analytical skills and knowledge of analytical tools. * Demonstrated ability to support, maintain, and administer complex applications ## Desired Skills * Strong understanding of network architecture, protocols, and security principles * General knowledge of DISA STIGs and hardening methods * Experience with configuring and troubleshooting LAN and WAN connections * Experience with classified network environments and familiarity with government security regulations. * Proficiency in managing and troubleshooting Windows and Linux operating systems. * Hands-on experience with network hardware (routers, switches, firewalls). * Excellent problem-solving skills and the ability to work under pressure. * Knowledge of Windows Server and Desktop Operating Systems administration (Windows, 7, 10, 2008, 2012 and 2016) * Knowledge of Virtualization (VMware, Horizon, vSphere, vCenter, vCloud, vRealize, NSX, vSAN or VXRail) * Knowledge of implementing vulnerability compliance solutions (WSUS, SCCM, Splunk, ACAS, SCAP, HBSS, NESSUS) ## Description This Enterprise Operations (EO) position supports Lockheed Martin Rotary and Mission Systems (RMS). The selected candidate will be responsible for upgrades, operations and maintenance, hardware and software installations, and service requests (servers, workstations, phones, networking, and storage), as well as continuity of operations. We are seeking a Network Engineer/System Administrator team member to join our team supporting the Hanover and Annapolis Junction. In this fast-paced environment, you'll draw on your education and experience as well as the resources of Lockheed Martin to solve problems and be a contributing member of a highly skilled team. The primary function will be to organize, install, and maintain discrete classified networks. Performs a variety of activities in information systems design, development, and analysis encompassing one or more of the following areas of technical expertise: programming, computer application analysis, software development, systems integration, and related disciplines., MANTECH seeks a highly skilled and innovative CNO Reverse Engineer to join our team in Hanover, MD. 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