Network Security Engineer

• Move services onto new F5 pairs, rewriting iRules and traffic policies as needed.
• Serve as the go-to F5 expert for design and architecture calls.
• Roll out software upgrades across iSeries, rSeries, and VIPRION hardware.
• Write runbooks covering backups, pre-checks, and rollback steps.
• Stagger upgrades across HA pairs so services stay online throughout.
• Manage cutover windows, including DNS/GTM changes, with tested fallback plans.
• Dig into network, DNS, TLS, and application issues when changes go wrong.

Essential:

• Deep hands-on background with F5 TMOS, LTM, and DNS/GTM.
• Track record upgrading iSeries, rSeries/F5OS, and VIPRION/vCMP in live environments.
• At least one completed load balancer platform migration, start to finish.
• Comfortable writing and troubleshooting iRules for traffic and app logic.
• Working automation skills in Python, Ansible, or Terraform.
• Solid grounding in TCP/IP, BGP, TLS/PKI, and DNS fundamentals.
• A methodical approach to diagnosing issues across the network and app stack.

Desirable:

• Familiarity with the legacy platform being replaced.
• Experience running BIG-IP Virtual Edition on VMware.
• F5 certifications (F5-CA, F5-CTS, F5-CSE) or equivalent know-how.
• Background working in financial services or similarly regulated sectors.

World Wide Technology (WWT), is a 36-year-old global technology integrator and IT solutions provider. Through our culture of innovation, we inspire, build, and deliver business results from idea to outcome.

World Wide Technology Holding (WWT) is looking for a Network Security Engineer to support a major load balancing uplift for a leading global financial services client.

Working alongside a distributed group of network engineers and developers, you’ll bring F5 depth and automation know-how together to keep a large iSeries/rSeries/VIPRION fleet patched and current, while shifting application services onto new rSeries pairs with as little disruption to the business as possible.