Senior Network Administrator: Onsite Network & Security

Apex Systems; Alexandria (VA); On-site; USD 90,000 - 130,000; Full time

Benefits offered by this job

Medical benefits

401K with match

ESPP

HSA

EAP

Job summary

Everforth Apex Systems is seeking a Sr. Network Administrator in Alexandria, VA (22315) for 100% onsite work Monday–Friday. You will work with senior engineers to troubleshoot incidents, design networks, and manage NAC with Cisco ISE and DNA Center while enforcing security policies.

The role requires a High School diploma and 3+ years of experience, with CCNA and Security+ certifications preferred. Expect hands-on work with VLANs, VPNs, firewalls, and network monitoring tools in a fast-paced

Qualifications

• High School diploma required.
• 3+ years of experience in network administration.
• Certifications: CompTIA Security+, CCNA.
• TS/SCI security clearance preferred.

Responsibilities

• Troubleshoot incidents with senior network engineers, system administrators and security teams.
• Participate in network design discussions and deployments and support infrastructure buildouts.
• Support Cisco ISE and DNA Center for NAC, policy automation and assurance.
• Implement VLANs, routing policies, ACLs, NAT and segmentation for secure networks.
• Enforce firewall rules, VPN configurations and security best practices for compliance.
• Maintain thorough documentation and follow change management procedures.

Skills

Troubleshooting skills

Verbal communication

Documentation

Teamwork

Attention to detail

Independent work

Education

High School diploma

Tools

Cisco ISE

DNA Center

Wireshark

NetFlow

Job description

Everforth Apex Systems is seeking a Sr. Network Administrator in Alexandria, VA (22315) for 100% onsite work Monday–Friday. You will work with senior engineers to troubleshoot incidents, design networks, and manage NAC with Cisco ISE and DNA Center while enforcing security policies.

The role requires a High School diploma and 3+ years of experience, with CCNA and Security+ certifications preferred. Expect hands-on work with VLANs, VPNs, firewalls, and network monitoring tools in a fast-paced