Senior Network Administrator: Enterprise Infra & Security

Ampcus, Inc; Chantilly (VA); On-site; USD 85,000 - 120,000; Full time

Job summary

Ampcus Inc. is seeking a mid-level Network Administrator to support and maintain enterprise network infrastructure in the Sully Station, VA area. The role requires a bachelor’s degree or equivalent certifications, plus hands-on experience with LAN/WAN, routers, switches, and firewalls.

Responsibilities include configuring and monitoring network performance, troubleshooting Tier 1/2 issues, documenting changes, and supporting cybersecurity initiatives while working independently or with a team.

Qualifications

• 5+ years of hands-on network administration experience.
• Bachelor's degree or equivalent experience and industry certifications considered.
• Experience administering enterprise LAN, WAN, and network infrastructure.
• Strong knowledge of DHCP, DNS, Routers, Switches, Firewalls, Network security, TCP/IP networking.

Responsibilities

• Install, configure, maintain, and support LAN, WAN, and Internet network infrastructure.
• Monitor network performance, availability, and utilization to ensure reliable operations.
• Troubleshoot and resolve Tier 1 and Tier 2 network and software support requests.
• Configure, deploy, and maintain routers, switches, firewalls, DHCP, DNS, and related networking technologies.
• Design and implement network extensions and connectivity solutions.
• Maintain network architecture, project documentation, inventory, and maintenance records.
• Document network changes and maintain detailed change management history.
• Perform network tuning, optimization, and capacity planning.
• Assess existing network infrastructure and recommend improvements based on best practices and cybersecurity standards.

Skills

General IT

Cisco Routing & Switching

VLAN Management

Network Design

Subnetting

Routing Protocols

Network Security

DNS/DHCP

Network Monitoring

Network Cable Management

Cisco FMC/Firepower

Solutions Design Build

Integration Troubleshooting

Cybersecurity

Software Integrations

Education

Bachelor's degree in Information Technology, Computer Science, or related field

Job description

Ampcus Inc. is seeking a mid-level Network Administrator to support and maintain enterprise network infrastructure in the Sully Station, VA area. The role requires a bachelor’s degree or equivalent certifications, plus hands-on experience with LAN/WAN, routers, switches, and firewalls.

Responsibilities include configuring and monitoring network performance, troubleshooting Tier 1/2 issues, documenting changes, and supporting cybersecurity initiatives while working independently or with a team.