Senior Network Administrator jobs in United States
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Jobs via Dice ยท 1 day ago

Senior Network Administrator

Leidos has an exciting opportunity for a Senior Network Administrator to work at the DOE Portsmouth site. This role involves providing advanced technical leadership in the design, implementation, optimization, and security of the organization's enterprise network infrastructure while mentoring junior staff.

Computer Software
badNo H1BnoteSecurity Clearance RequirednoteU.S. Citizen Onlynote

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 business growth and resiliency
Mentor and provide technical guidance to Network Administrators and junior IT staff
Partner with cybersecurity, systems, cloud, and application teams to ensure secure and reliable end-to-end solutions
Lead disaster recovery and business continuity planning for network infrastructure, including regular testing and documentation
Ensure compliance with organizational policies, security frameworks, and regulatory requirements
Participate in vendor evaluations, solution selection, and lifecycle management

Qualification

Network architectureCisco networkingNetwork security solutionsAdvanced Cisco certificationsTechnical leadershipCloud networkingStakeholder engagementDocumentation skillsCommunication skills

Required

Bachelor's degree in Computer Science, Information Technology, or a related field with a minimum of five (5) years of progressive experience supporting enterprise networks, or equivalent hands-on experience
Must be able to obtain and maintain a DOE Q security clearance
Demonstrated experience designing and supporting complex, multi-site enterprise network environments
Advanced expertise with Cisco networking platforms, including IOS, Nexus OS, routing protocols, and switching technologies
Strong experience with Cisco wireless, ISE, Prime, and secure remote connectivity solutions
Proven ability to lead technical initiatives and act as a network subject matter expert

Preferred

Advanced Cisco certifications (e.g., CCNP or higher)
Experience in regulated or government environments
Familiarity with cloud networking and hybrid architectures
Strong documentation, communication, and stakeholder engagement skills

Company

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