Sr. L3 Network Engineer | 12696

Posted Yesterday
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Pleasanton, CA, USA
In-Office
Senior level
Information Technology • Professional Services • Software • App development
The Role
Designs and implements enterprise Layer 2 and Layer 3 network architectures on Cisco Catalyst platforms. Develops BGP routing strategies, builds microsegmentation solutions, automates network deployment with Terraform and Ansible, troubleshoots production issues, documents standards, collaborates on scalable designs, and mentors junior engineers.
Summary Generated by Built In

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


Skills Required

  • 8+ years of enterprise network engineering experience
  • Hands-on knowledge of Layer 2 protocols, including RSTP, VLANs, trunk/access ports, and MAC address tables, on Cisco Catalyst 9300 platforms
  • Hands-on experience configuring and optimizing BGP, including iBGP and eBGP
  • Hands-on experience with Terraform and Ansible for network automation
  • Hands-on experience implementing microsegmentation using PVLANs, TrustSec/SGTs, or equivalent technologies
  • Ability to independently architect network solutions
  • Bachelor's degree in Computer Science, IT, or a related field, or equivalent professional experience
  • Strong analytical, troubleshooting, and communication skills
  • Experience with Cisco Catalyst 9800 wireless controllers
  • Experience designing or supporting networks in Operational Technology environments
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The Company
79 Employees
Year Founded: 1998

What We Do

CTI Consulting is a South Florida technology solutions and staffing firm founded in 1998. It provides IT staffing and nearshore staffing services for startups through Fortune 100 companies, alongside digital-product work such as designing, testing, deploying, improving, and updating mobile applications. The company emphasizes close client collaboration, comprehensive candidate evaluation, continuing education, and innovative, scalable software solutions that improve operational efficiency.

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