Sr. L3 Network Engineer

CTI Consulting • Pleasanton, CA

5d • Onsite

About The Position

CTI Staffing is partnering with a leading global consumer products organization to find a Senior Network Engineer III for their network infrastructure team, based in Pleasanton, CA. This team owns enterprise network design and security across a large, complex environment. You'll be the engineer other teams come to when a routing problem or a segmentation project needs real expertise, not a quick patch. This role has room to shape how the network is architected going forward, not just maintain what's already built.

Requirements

• 8+ years of enterprise network engineering experience
• Strong hands-on knowledge of Layer 2 protocols (RSTP, VLANs, trunk/access ports, MAC address tables), specifically on Cisco Catalyst 9300 platforms
• Proven hands-on experience with BGP routing (iBGP and eBGP configuration and optimization)
• Genuine hands-on experience with Terraform and Ansible for network automation
• Hands-on experience implementing microsegmentation (PVLANs, TrustSec/SGTs, or equivalent)
• Demonstrated ability to architect network solutions independently, not just maintain existing designs
• Bachelor's degree in Computer Science, IT, or related field, or equivalent professional experience
• Strong analytical, troubleshooting, and communication skills

Nice To Haves

• Experience with Cisco Catalyst 9800 wireless controllers
• Experience designing or supporting networks in Operational Technology (OT) environments

Responsibilities

• Design and implement Layer 2 and Layer 3 network architectures on enterprise Cisco Catalyst platforms
• Develop and deploy BGP routing strategies for internal and external connectivity
• Build microsegmentation solutions to strengthen network security and isolation
• Automate network configuration and deployment using Terraform and Ansible
• Translate business requirements into scalable network designs alongside cross-functional teams
• Troubleshoot complex network issues in live production environments
• Maintain documentation and configuration standards for the network team
• Mentor junior network engineers on design and troubleshooting practices

What This Job Offers

• Job Type: Full-time
• Career Level: Senior