Network Administrator Senior

GD Information Technology, Inc.; Florida; On-site; USD 85,000 - 101,000; Full time

Job summary

General Dynamics Information Technology, Inc. is seeking a seasoned network engineer to oversee the global backbone and data center fabric, ensuring maximum service availability.

You will drive ITSM integration via ServiceNow, maintain CMDB accuracy, and enforce security and configuration standards across enterprise WAN/LAN environments. The role requires hands-on management of routers, switches, and encryption devices, with strong emphasis on collaboration, mentorship, and disaster recovery

Qualifications

• Active Secret security clearance (or higher) required.
• 5+ years of enterprise WAN/LAN experience.
• Bachelor’s degree or equivalent experience; professional certifications in networking.
• CCNA and Security+ CE or equivalent certifications required.

Responsibilities

• Oversee lifecycle of global backbone and data center fabric for maximum availability.
• Lead ITSM integration via ServiceNow; document incidents and changes.
• Maintain CMDB with rack elevations, port maps, IP assignments for audits.
• Configure and maintain routers, switches, and encryption devices per standards.
• Troubleshoot complex connectivity to ensure mission-critical data flow.
• Enforce configuration standards including STIG compliance and risk mitigation.
• Collaborate to transform designs into operational network infrastructure.
• Provide mentorship to mid-level and junior engineers.
• Develop disaster recovery and rapid restoration procedures.
• Monitor network performance and resolve bottlenecks.
• Manage hardware logistics, RMAs, vendor coordination, spare parts.
• Serve as on-call escalation point for infra issues.

Skills

OSPF/BGP/STP routing

Enterprise WAN/LAN expertise

Effective communication

Networking principles

Education

Bachelor's Degree or equivalent professional experience

CCNA

Security+ CE

Tools

ServiceNow ITSM

Network monitoring tools

Router/Switch management tools

Job description

Responsibilities

• Oversee the lifecycle of a global multiplanar backbone and data center fabric, ensuring maximum service availability through rigorous hardware/software management and proactive system maintenance.
• Lead and enforce the integration of ITSM processes via ServiceNow, ensuring that incidents, service requests, and configuration changes are consistently documented.
• Maintain an up-to-date Configuration Management Database (CMDB), tracking rack elevations, port maps, and IP assignments for audit readiness and system accuracy.
• Configure and maintain network devices, including routers, switches, encryption devices, and related hardware, adhering to global infrastructure standards.
• Troubleshoot and resolve complex connectivity issues to maintain enterprise-wide data flow, ensuring service availability for critical operations.
• Implement and enforce configuration standards, including STIG compliance audits and proactive risk mitigation processes.
• Collaborate with cross-functional teams to transform high-level designs into operational physical and logical network infrastructure.
• Provide mentorship and technical support to mid-level and junior team members, instilling best practices and enforcing operational discipline.
• Develop and implement disaster recovery and rapid restoration procedures to maintain network resilience and reduce downtime.
• Monitor network performance to identify and resolve bottlenecks, enhancing data traffic flow and ensuring mission-critical capacity.
• Manage hardware logistics, including RMAs, vendor coordination, and spare parts inventory to minimize repair times.
• Serve as an on-call escalation point, delivering timely resolution of infrastructure issues.

Required Qualifications

• Active Secret security clearance (or higher).
• 5+ years of experience implementing, maintaining, and securing complex enterprise WAN/LAN environments.
• Bachelor's Degree or equivalent professional experience.
• Current professional certifications in networking and security, such as CCNA, Security+ CE, or equivalent.
• Expert-level knowledge of networking principles, including routing and switching protocols (OSPF, BGP, STP), and physical layer standards (fiber/copper/transceivers).
• Proficiency in administering and securing various network architectures that support enterprise-level voice, video, and data services.
• Experience administering and securing enterprise network architectures, supporting voice, video, and data services.
• Advanced knowledge of ServiceNow ITSM modules, including change, incident, and configuration management practices.
• Commitment to government security and experience working in regulated environments.
• Exceptional communication skills, capable of effectively articulating complex technical concepts to diverse audiences, including technical teams and leadership.

Preferred Qualifications

• Bachelor’s degree in a technical field (e.g., Computer Science, Networking) or equivalent professional experience.
• Advanced certifications, such as Cisco CCNP or Juniper JNCIP.
• Experience with asset management and physical infrastructure planning, including rack-level design and documentation.
• Knowledge of virtualization technologies and their application to network services.
• Hands-on experience with firewall administration and ACL management.

The likely salary range for this position is $85,093 - $100,625. 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.

Scheduled Weekly Hours: 40

Travel Required: Less than 10%

Telecommuting Options: Onsite

Work Location: USA FL MacDill AFB

Total Rewards at GDIT

Our benefits package for all US-based employees includes a variety of medical plan options, some with Health Savings Accounts, dental plan options, a vision plan, and a 401(k) plan offering the ability to contribute both pre and post-tax dollars up to the IRS annual limits and receive a company match. To encourage work/life balance, GDIT offers employees full flex work weeks where possible and a variety of paid time off plans, including vacation, sick and personal time, holidays, paid parental, military, bereavement and jury duty leave. To ensure our employees are able to protect their income, other offerings such as short and long-term disability benefits, life, accidental death and dismemberment, personal accident, critical illness and business travel and accident insurance are provided or available. We regularly review our Total Rewards package to ensure our offerings are competitive and reflect what our employees have told us they value most.

Our Identity Verification Process

As part of the hiring process, we will ask you to complete an identity verification process that leverages advanced biometrics and artificial intelligence to ensure authenticity and protect against identity fraud. You are expected to be on camera during virtual interviews. We reserve the right to take your picture to verify your identity and prevent fraud. By proceeding, you authorize the collection, processing, and use of your biometric data for identity verification and security purposes.

About Our Work

We are GDIT. A global technology and professional services company that delivers technology solutions and mission services to every major agency across the U.S. government, defense and intelligence community. Our 26,000 experts extract the power of technology to create immediate value and deliver solutions at the edge of innovation. We operate across 50+ countries worldwide, offering leading mission-ready capabilities in AI, cloud, cyber and software development.

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