Sr. Network Engineer - F5

Job Description

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)

Employment Type: Direct Hire

Citizenship: US Citizens and Green Card Holders only

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 decisionsCompany Description

Who We Are

GTN is the leader in technical staffing, leveraging innovation to drive next-generation recruiting to Fortune 2000 companies.

What We Do

We provide Scalable Technical Staffing solutions encompassing SOW, staff augmentation, and direct hire placement for Fortune 2000 companies, with niche service offerings in Cyber Security, Digital, Field Services, and Professional Services. Our recruiting teams are specialized, certified, and have endured rigorous technical boot camps and ongoing required educational courses and meetups.

What Proof We Have

We have experience in scalable IT Staffing since the year 2000. Our IT experts have helped Fortune 2000 corporations embrace the cybersecurity and digital space, with many of our experts remaining on contract with clients for 8+ years. Our staffing experts have been engaged to speak at cybersecurity conferences, and our teams are certified and specialize in divisions focused around cyber, digital, field, and professional services.

Why People Want It

Our value

Full-time

Hybrid remote