Job Description

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

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.

Key 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.

Required Qualifications

• 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).

Preferred Qualifications

• 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.

Success Factors

Service-driven, detail-oriented, adaptable, and comfortable working independently while collaborating on escalations and projects.

OneZero Solutions, LLC is an Equal Opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, pregnancy, genetic information, disability, status as a protected veteran, or any other protected category under applicable federal, state, and local laws.

To request an accommodation, please contact us at recruiting@onezerollc.com or call (202) 987-2580.