Senior Network Engineer – Onsite Data Center

Apex Systems; Radford, Northern (VA, KY); Hybrid; USD 110,000 - 160,000; Full time

Benefits offered by this job

Medical, dental, vision insurance

401K with company match

ESPP

On-site training and certification

Job summary

Apex Systems in Radford, Virginia is seeking a Senior Network Engineer to design, implement, and sustain enterprise network infrastructure across data centers, Cisco Nexus/Catalyst environments, and cloud integrations.

The role emphasizes security posture, vulnerability remediation, documentation, and mentoring junior engineers, with onsite work and coordination across mission partners and internal teams.

Qualifications

• 5+ years in network engineering within a data center
• Hands-on configuration of switches, routers, firewalls, and load balancers
• Ability to design, deploy, and troubleshoot enterprise network infrastructure (Tier II/III)
• Experience with security hardening and vulnerability remediation

Responsibilities

• Design, implement, and maintain scalable network infrastructure
• Translate requirements into network architecture solutions
• Configure and deploy network devices (routers, switches, firewalls, load balancers)
• Assess changes for security impact and ensure compliance
• Monitor performance and resolve issues
• Provide Tier II/III troubleshooting support
• Maintain security posture and remediate vulnerabilities
• Document changes and develop SOPs and network diagrams
• Mentor junior engineers

Skills

Network engineering

Tier II/III support

Security posture

Technical documentation

Tools

Cisco Nexus

Cisco Catalyst

Palo Alto

F5

Ansible

Python

Job description

Apex Systems in Radford, Virginia is seeking a Senior Network Engineer to design, implement, and sustain enterprise network infrastructure across data centers, Cisco Nexus/Catalyst environments, and cloud integrations.

The role emphasizes security posture, vulnerability remediation, documentation, and mentoring junior engineers, with onsite work and coordination across mission partners and internal teams.