The Senior F5 Administrator is responsible for the design, implementation, and operational management of enterprise F5 BIG‑IP application delivery and traffic management platforms across on‑premises and cloud environments. This role serves as a Level‑3 escalation point and provides architectural leadership for load balancing, application availability, SSL/TLS services, and resiliency designs supporting business‑critical applications.

Responsibilities

  • Operate and support enterprise F5 BIG-IP platforms (physical, virtual, and cloud), ensuring high availability and performance for business-critical applications.
  • Provide Level-3 operational support for incidents, outages, and complex performance issues, serving as an escalation point for F5-related services.
  • Configure and maintain application traffic services, including VIPs, pools, health monitors, persistence, profiles, and iRules.
  • Manage platform lifecycle activities, including software upgrades, hotfixes, and routine maintenance across environments.
  • Implement and support SSL/TLS services, including certificate deployment, renewal, and synchronization in high-availability configurations.
  • Partner with application, network, and security teams to onboard new services and resolve operational issues in production environments.
  • Support hybrid and cloud-based deployments, including F5 services in AWS and/or Azure and integration with upstream security controls.
  • Maintain operational documentation, including runbooks, standards, and configuration records to support audits and service continuity.

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Qualifications

  • 5+ years of hands‑on experience administering F5 BIG‑IP platforms
  • Strong expertise with:
  • BIG‑IP LTM
  • VIPs, pools, monitors, persistence, profiles
  • iRules (development and troubleshooting)
  • Experience with high‑availability (HA) designs and traffic failover
  • Strong understanding of:
  • TCP/IP, HTTP/S, DNS
  • Load‑balancing algorithms and application behavior
  • Proven experience in enterprise production environments

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Preferred Qualifications

  • Experience with F5 in cloud environments (AWS and/or Azure)
  • Familiarity with application resiliency and blue/green deployment patterns 1
  • Experience integrating F5 with security platforms (WAF, firewalls, segmentation)
  • Scripting or automation experience (Ansible, Python, Bash, REST APIs)
  • F5 certifications (e.g., F5‑CA, F5‑CTS)

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Working Conditions

  • This is a hybrid position requiring three days in office per week in one of our core locations (Cedar Rapids, IA/ Denver, CO/ Philadelphia, PA)
  • Non-traditional work hours as needed
  • Participate in scheduled on-call rotations and provide after-hours support as required to maintain the security and availability of critical network services.


This job description is not a contract of employment nor for any specific job responsibilities. The Company may change, add to, remove, or revoke the terms of this job description at its discretion. Managers may assign other duties and responsibilities as needed. In the event an employee or applicant requests or requires an accommodation to perform job functions, the applicable HR Business Partner should be contacted to evaluate the accommodation request.

Compensation

The Salary for this position generally ranges between $94K - $120K annually. Please note that the salary range is a good faith estimate for this position and actual starting pay is determined by several factors including qualifications, experience, geography, work location designation (in-office, hybrid, remote) and operational needs. Salary may vary above and below the stated amounts, as permitted by applicable law.

Additionally, this position is typically eligible for an Annual Bonus based on the Company Bonus Plan/Individual Performance and is at the Company’s discretion. 

Applicants must be authorized to work for any employer in the U.S. We are unable to sponsor or take over sponsorship of an employment Visa at this time.

  

This is a hybrid position requiring three days in office per week in one of our hub locations (Philadelphia, PA; Cedar Rapids, IA; Denver, CO).  Relocation assistance will not be provided for this position.