> Markdown version of [/jobs/ext/3017378-senior-network-administrator-columbia-frederick-md](https://www.wearedevelopers.com/jobs/ext/3017378-senior-network-administrator-columbia-frederick-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). --- # Senior Network Administrator - Columbia/Frederick, MD - **Company:** Rohde & Schwarz - **Location:** Columbia, MD, United States (Remote available) - **Experience:** Expert - **Salary:** $90,000.0 - $120,000.0 - **Contract:** Permanent contract - **Skills:** IEEE 802.1X, Systems Engineering, Cisco IOS, Configuration Management, Complex Networks, System Configuration, EtherChannel, Hot Standby Router Protocol, IPv6, Network Security, Network Layer, Multicasting, Network Architecture, Routing, Network Administration, Open Shortest Path First (OSPF), TCP/IP, Virtual Local Area Networks, Computer Networking Systems, Computer Network Operations, Software Troubleshooting, Information Technology, Cisco Switches, Cisco - **Published:** September 20, 2026 - **Apply:** https://www.indeed.com/viewjob?jk=7af1034bb00c7669 ## About the Role * Bachelor's degree in information technology, Computer Science, Engineering, or equivalent experience. * Cisco CCNP Enterprise certification required or equivalent experience required * 7+ years of experience designing, configuring, and administering enterprise network infrastructure. * Extensive hands-on experience with Cisco Catalyst 9300 switches and Cisco IOS-XE. * Strong knowledge of TCP/IP, IPv6, VLANs, multicast, HSRP, STP, EtherChannel, OSPF, static routing, QoS, and network security principles. * Experience supporting highly available, mission-critical voice, communications, or network systems. * Strong troubleshooting, analytical, and problem-solving skills. * Good written and verbal communication skills * In order to be considered, candidates must reside in the US and be a U.S. citizen capable of receiving a US Government security clearance or public trust ## Description Recently named by Newsweek as one of the Best American Mid-Sized Workplaces in 2026, Rohde & Schwarz is seeking an experienced Senior Network Administrator for our System Engineering organization to support a large air traffic control government program deploying voice communication systems. The work location for this position is split between our Columbia/Frederick, MD office locations, averaging 3 days per week on site and 2 days per week working from home. The Senior Network Administrator is responsible for the design, configuration, administration, and sustainment of mission-critical Voice Communication System (VCS) network infrastructure. Operating at a level comparable to a Cisco Certified Network Professional (CCNP) or similar, this role provides technical leadership for Cisco Catalyst 9300 switching environments, ensuring secure, reliable, and high-availability network operations in support of customer and operational requirements. US citizenship is a customer requirement for this role., * Lead the configuration, deployment, and administration of Cisco Catalyst 9300 switching infrastructure. * Design and implement Layer 2 and Layer 3 network solutions, including VLANs, routing, QoS, redundancy, and security controls. * Manage network performance, availability, and lifecycle activities, including software upgrades, patching, and configuration management. * Troubleshoot complex network, switching, and connectivity issues across operational environments. * Implement and maintain network security controls, including ACLs, multicast, 802.1X, port security, and device hardening. * Develop and maintain network architecture diagrams, configuration baselines, and technical documentation. * Support VCS integration, migration, modernization, and sustainment activities. * Provide technical leadership and mentorship to junior network administrators and technicians. * Coordinate with cybersecurity, systems engineering, and customer stakeholders to ensure compliance and operational readiness. Exciting insights into Rohde & Schwarz Our colleagues provide insider information about: * Daily adventures and challenges * Our passionate team * The technologies behind the innovative projects and solutions ## Related Videos - [How Cisco embraced a DevOps culture within its network engineering team](https://www.wearedevelopers.com/videos/99-how-cisco-embraced-a-devops-culture-within-its-network-engineering-team) - [IoT: The road to sustainability](https://www.wearedevelopers.com/videos/557-iot-the-road-to-sustainability) - [An Applied Introduction to eBPF with Go](https://www.wearedevelopers.com/videos/1075-an-applied-introduction-to-ebpf-with-go) - [What makes Cybersecurity different for critical infrastructure?](https://www.wearedevelopers.com/videos/571-what-makes-cybersecurity-different-for-critical-infrastructure) - [Computer Vision from the Edge to the Cloud done easy](https://www.wearedevelopers.com/videos/263-computer-vision-from-the-edge-to-the-cloud-done-easy) - [Turning Container security up to 11 with Capabilities](https://www.wearedevelopers.com/videos/718-turning-container-security-up-to-11-with-capabilities) ## Related Articles - [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again) - [Finding Jobs in Germany](https://www.wearedevelopers.com/magazine/375-finding-jobs-in-germany) - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [Best Companies to Work For in Berlin: Top 14 Companies in 2023 ](https://www.wearedevelopers.com/magazine/188-best-companies-to-work-for-in-berlin-top-14-companies-in-2023) - [The Best Job Search Websites of 2025](https://www.wearedevelopers.com/magazine/368-the-best-job-search-websites-of-2025) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated)