Cisco Administrator / Network Engineer

OneZero Solutions

20h•Hybrid

About The Position

We are an employee-centric company that truly appreciates our team members and their value to our customers and the missions they support. We pride ourselves on being forward-leaning thinkers and fostering teams that are and continue to be technically proficient and technically capable across a comprehensive range of cyber mission areas. OneZero full-time employees receive an extremely competitive benefits package that includes health/dental/vision/life insurance plans, 401K with company matching, PTO & paid holidays, employee referral program, and educational assistance. Additional details can be found on our website at: https://www.onezerollc.com/careers/ Position Title: Cisco Administrator / Network Engineer Clearance: Secret Location: Hybrid - ability to work onsite in Alexandria, VA 3 days per week Overview Provide day-to-day administration and Tier 2-3 troubleshooting for Cisco network infrastructure in a DoD environment (SIPR/NIPR). Execute routine to moderately complex changes, support upgrades/cutovers, and maintain documentation and compliance within secure/offline operating constraints.

Requirements

Active Secret Clearance; ability to work onsite in Alexandria, VA as needed (Hybrid) in SIPR/NIPR and SCIF environments.
High School diploma or equivalent (Associate/Bachelor's in IT-related field preferred).
3-5 years hands-on network administration experience, including Cisco routing and switching in enterprise or DoD environments.
Working knowledge of TCP/IP, subnetting, DNS/DHCP, VLANs, trunking, and basic routing concepts; familiarity with OSPF/BGP preferred.
Strong troubleshooting/analytical skills and ability to communicate clearly with customers and stakeholders.
Proficiency with Microsoft Office (Word, Excel, PowerPoint).

Nice To Haves

Experience with monitoring/troubleshooting tools (e.g., SolarWinds, Wireshark, Cisco tools).
Experience supporting offline/air-gapped environments.
Exposure to firewalls and security controls (ACLs; Cisco ASA/Palo Alto/Fortinet a plus).
QoS/VoIP familiarity a plus.
Certifications: CCNA strongly preferred; CCNP a plus.

Responsibilities

Administer and support Cisco LAN/MAN/WAN networks in SIPR/NIPR environments.
Troubleshoot Tier 2-3 issues (routing/switching, VLANs/trunking, VPN connectivity, interface errors, basic QoS); drive incidents to closure.
Implement standard and moderately complex changes (ports/VLANs, configuration updates, access control changes) in accordance with change management.
Monitor network performance/availability; analyze alerts, identify trends, and recommend corrective actions.
Support upgrades, migrations, integrations, and conversions/cutovers, including planning inputs, testing, and validation.
Coordinate with internal teams and vendors; collect/interpret logs and diagnostics to support resolution.
Maintain network documentation (diagrams, baselines, runbooks/SOPs) and keep records current.
Partner with cybersecurity/systems teams on device authentication, access controls, and compliance requirements.
Participate in on-call rotation and respond to priority incidents as required.