Senior Network Administrator - TS/SCI with CI Poly - Chantilly, VA

Senior Network AdministratorLocation: McLean, VA (with an opportunity to work from the Chantilly, VA location by the end of the year) Work Arrangement: Onsite, 5 days per week Travel: Up to 20% Clearance: Active TS/SCI with Counterintelligence (CI) Polygraph Certification Requirement: Current IAM Level II certification to satisfy DoD 8570 IAT requirements Salary: $175,000–$230,000Key ResponsibilitiesDesign, configure, troubleshoot, and maintain cutting-edge and complex Layer 2/3 data center architectures using BGP, ECMP, VXLAN, MCLAG, Spine-Leaf topologies, RoCEv2, and related technologies.Collaborate with cross-functional teams to understand business requirements and translate them into effective network solutions.Troubleshoot complex network issues and help drive incidents through resolution.Provide expert technical guidance and support to junior team members, contributing to their professional growth and development.Participate in network installations, upgrades, implementations, testing, and operational improvement initiatives.Contribute to the documentation of network infrastructure designs, configurations, and operational procedures.Stay current on networking trends, technologies, and best practices and proactively expand technical expertise.Support the design, implementation, and optimization of networking infrastructure supporting AI and other demanding workloads.Travel up to 20% as required to perform on-site installations, maintenance, troubleshooting, and operational support at customer sites or data centers.Required QualificationsProven experience designing, configuring, and managing complex BGP, VXLAN, and Layer 2/3 data center architectures.Expertise in designing and troubleshooting complex Layer 2/3 network topologies.Experience with redundancy protocols such as MCLAG (Multi-Chassis Link Aggregation Group) or LACP.Experience with Spine-Leaf data center fabrics, including architecture design and implementation.Ability and willingness to develop and maintain expertise in RDMA over Converged Ethernet (RoCEv2) supporting ultra-high-speed data transfers.Strong problem-solving skills, attention to detail, and commitment to quality work.Excellent communication and teamwork skills, with the ability to collaborate effectively with cross-functional teams.Ability to stay current with industry trends and technology advancements.Ability and willingness to travel up to 20% domestically and internationally.Active TS/SCI clearance with Counterintelligence (CI) Polygraph.Current IAM Level II certification to satisfy DoD 8570 IAT requirements.Preferred QualificationsExperience with Linux-based Network Operating Systems (NOS).Experience mentoring or providing technical guidance to junior network professionals.Experience supporting high-performance or AI-focused data center environments. PGTEK