Sr. L3 Network Engineer | 12696

About This Opportunity

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.

What You'll Do

• 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
  
  

Requirements

What You Bring

Must-Have:

• 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-Have:

• Experience with Cisco Catalyst 9800 wireless controllers
  
  


• Experience designing or supporting networks in Operational Technology (OT) environments
  
  

Technical Environment:

• Cisco Catalyst 9300/9800
  
  


• BGP (iBGP/eBGP)
  
  


• Terraform, Ansible
  
  


• PVLANs, TrustSec/SGT
  
  

What Success Looks Like:

• Independently owns network design decisions within the first 6 months
  
  


• Has delivered at least one complete routing or microsegmentation project
  
  


• Is mentoring junior engineers without needing to be prompted