Senior Network Administrator - Columbia​/Frederick, MD

• 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.

We are looking to fill the Senior Network Administrator - Columbia/Frederick, MD position at ROHDE & SCHWARZ GmbH & Co. KG in Columbia, MD, United States.