Senior Network Engineer — Enterprise Networking & Security

GCS Recruitment; Fremont (CA); On-site; USD 120,000 - 180,000; Full time

Job summary

GCS Recruitment is seeking an experienced Network Engineer to support and maintain enterprise network infrastructure in Fremont, California. You will manage routing, switching, firewalls, wireless networks, and connectivity solutions across physical and virtual environments.

The ideal candidate brings 5+ years of hands-on networking experience, strong TCP/IP knowledge, and relevant vendor certifications. You will troubleshoot issues, participate in infrastructure projects, and collaborate with

Qualifications

• 5+ years of networking or IT infrastructure experience.
• Strong knowledge of TCP/IP, routing, switching, VLANs, firewalls, and wireless tech.
• Experience with Cisco, RUCKUS, or similar network vendors.
• Familiar with virtualization platforms such as VMware, Hyper-V, or KVM.
• Certifications CCNA/CCNP/Network+ are beneficial.

Responsibilities

• Maintain and troubleshoot enterprise network infrastructure.
• Manage routing, switching, firewalls, and wireless networks.
• Support infrastructure projects and cross-functional teams.
• Ensure network performance, security, and reliability across physical and virtual environments.

Skills

Networking

TCP/IP

Routing

Switching

VLANs

Firewalls

Wireless

Troubleshooting

Documentation

CCNA

CCNP

Network+

Tools

Cisco

Ruckus Wireless

VMware

Hyper-V

KVM

Job description

We are seeking an experienced Network Engineer to support and maintain enterprise network infrastructure. The role involves managing routing, switching, firewalls, wireless networks, and connectivity solutions while ensuring network performance, security, and reliability.

The successful candidate will troubleshoot technical issues, support infrastructure projects, and work closely with cross-functional teams to deliver effective networking solutions across physical and virtual environments.

Requirements

• 5+ years of experience in networking or IT infrastructure.
• Strong knowledge of TCP/IP, routing, switching, VLANs, firewalls, and wireless technologies.
• Experience with network vendors such as Cisco, RUCKUS, or similar.
• Familiarity with virtualisation platforms such as VMware, Hyper-V, or KVM.
• Excellent troubleshooting, problem-solving, and documentation skills.
• Relevant networking certifications (CCNA, CCNP, Network+, etc.) are beneficial.

This is a great opportunity for a hands-on networking professional looking to contribute to infrastructure projects and support business-critical environments.

GCS is acting as an Employment Business in relation to this vacancy.