Network Administrator Senior

Type of Requisition:

Regular

Top Secret/SCI

Top Secret/SCI

None

IT Infrastructure and Operations

Network Configurations, Networking Hardware, Network Operations

None

3 + years of related experience

Yes

Seize your opportunity to make a personal impact as a Network Administrator Senior supporting enterprise network operations for our federal customer. GDIT is your place to make meaningful contributions to challenging projects and grow a rewarding career.

At GDIT, people are our differentiator. As a Network Administrator Senior you will help ensure today is safe and tomorrow is smarter. Our work depends on a Network Administrator Senior joining our team to maintain and enhance secure, reliable, and high‑performance network services that enable the customer’s critical mission operations.

• Work closely with senior network engineers, system administrators, and security teams to troubleshoot issues, resolve incidents, and implement network changes in a collaborative team environment.
• Participate in network design discussions and deployments, supporting equipment setup, cabling, fiber work, and physical infrastructure buildouts while adhering to established standards and best practices.
• Support Cisco ISE and DNA Center (DNA‑C) to manage network access control, policy‑based automation, and assurance in a fast paced environment.
• Implement and manage VLANs, routing policies, access control rules, and network segmentation to support secure, scalable, and logically separated environments.
• Assist in maintaining secure network environments by enforcing firewall rules, VPN configurations, network access control policies, and security best practices in support of compliance and cyber defense objectives.
• Utilize full scope of technical and interpersonal skills to further the mission.

• 3+ years of experience

• Experience configuring and supporting network switches and routers
• Strong understanding of TCP/IP, DNS, DHCP, STP, SNMP, and routing fundamentals
• Hands‑on experience with Cisco ISE and DNA Center (DNA‑C)
• Knowledge of firewalls, ACLs, NAT, and VPN technologies
• Proficiency with VLANs, trunking, inter‑VLAN routing, and segmentation
• Experience with packet capture and analysis tools (e.g., Wireshark, Net Flow)
• Familiarity with enterprise wireless technologies and basic RF troubleshooting
• Understanding of network access control systems (RADIUS, TACACS+, 802.1X)
• Working knowledge of cabling standards, fiber infrastructures, and physical network components

• CompTIA Security+
• Cisco Certified Network Associate (CCNA)

• TS/SCI

• Strong troubleshooting and analytical skills with a methodical approach to problem solving
• Effective verbal and written communication skills to collaborate with technical and non‑technical stakeholders
• Ability to follow standard operating procedures, change management processes, and security/compliance requirements
• Strong attention to detail and ability to maintain accurate documentation
• Ability to work both independently and as part of a team in a fast‑paced, mission‑focused environment

• Experience with cloud networking concepts (Azure or AWS)
• Exposure to SD‑WAN technologies
• Familiarity with VoIP and QoS principles
• Experience with network automation tools or scripting (e.g., Python, Power Shell, Ansible)

• On Customer Site

• US Citizenship

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The likely salary range for this position is $106,250 - $143,750. This is not, however, a guarantee of compensation or salary. Rather, salary will be set based on experience, geographic location and possibly contractual requirements and could fall outside of this range.

40

Less than 10%

Onsite

USA VA Newington

Our benefits…