Senior Network Administrator

Job description

Leidos has an exciting and rewarding opportunity for a Senior Network Administrator to work at the DOE Portsmouth (Piketon, Ohio) site. The Senior Network Administrator provides advanced technical leadership in the design, implementation, optimization, and security of the organization’s enterprise network infrastructure. This role serves as a subject matter expert, leads complex troubleshooting efforts, and contributes to network architecture, standards, and long-term strategy while mentoring junior staff. Key Responsibilities: Design, implement, and maintain scalable, secure, and highly available enterprise network architectures across on-premises and hybrid environments. Lead complex troubleshooting efforts for critical network incidents, outages, and performance issues. Serve as the technical lead for network upgrades, migrations, refreshes, and major infrastructure initiatives. Architect and maintain advanced network security solutions including firewalls, IDS/IPS, VPNs, segmentation, and zero-trust principles. Develop and enforce network standards, best practices, and operational procedures. Perform capacity planning, performance tuning, and risk assessments to support busines...