Sr. Network Engineer F5

Locations (Onsite 3 Days/Week No Relocation Provided):

• Phoenix, AZ

• Chicago, IL

• New York, NY

Compensation: $120,000 $150,000 (USD per year)

Overview

We are seeking a seasoned Sr. Network Engineer F5 to join our enterprise infrastructure team. This is a true SME role for candidates with enterprise-level ownership of F5 environments, not just exposure. The engineer will focus on load balancing, application security, cloud migration, and automation while collaborating with senior engineers and leadership on high-visibility projects.

This position offers the opportunity to manage a large-scale F5 ecosystem, lead automation efforts in AWS, and work hands-on with advanced modules including APM, ASM, iRules, and AS3.

Key Responsibilities

• Serve as the F5 Subject Matter Expert, managing enterprise-wide load balancing and security environments.

• Design, configure, and troubleshoot F5 LTM, APM, ASM, and iRules (TCL scripting).

• Drive the cloud migration of F5 services, including automation builds in AWS using AS3, Ansible, and Python.

• Manage SSL certificates, MTLS configurations, and traffic policies.

• Partner with internal teams and external stakeholders to deliver secure, scalable, and resilient networking solutions.

• Perform advanced troubleshooting using TMSH, Bash, TCPDump, and Wireshark.

• Document designs, processes, and policies to support operational excellence.

• Participate in on-call rotation (1 week every 4 5 weeks):

  • Minimal pages (2 3 per week).

  • Evening production changes and occasional weekend upgrades (approx. every 6 weeks).

  • Flexible comp time provided.

Qualifications

• 7+ years of hands-on experience as a Network Engineer with enterprise-level F5 ownership.

• Advanced F5 expertise (300-level) required; F5 200-level certification mandatory (expired within last 5 7 years acceptable).

• Deep understanding of full proxy environments, NAT/SNAT, iRules, APM, ASM, LTM.

• Strong experience with cloud migrations, AWS AS3 automation, and Ansible/Python scripting.

• Proficiency in advanced troubleshooting with TMSH, Bash, TCPDump, Wireshark.

• Excellent communication skills with ability to collaborate across technical and business teams.

• Proactive, ownership-driven mindset; comfortable working on high-impact projects in a collaborative team environment.

Why Join

• True F5 Specialist Role: 100% focused on F5 technologies.

• Enterprise Scope: Own, manage, and optimize large-scale F5 environments.

• Cloud & Automation Focus: Lead automation and migration projects in AWS.

• Collaborative Team: Small, expert team with high visibility and direct influence on design decisions.