Senior F5 Network Engineer

Leidos; Tampa (FL); On-site; USD 92,000 - 167,000; Full time

Job summary

Leidos is seeking an experienced F5 Administrator to configure, deploy, and maintain F5 BIG-IP systems ensuring high availability for USCENTCOM on the CITS contract.

You will work with network, systems, and security teams to implement traffic management, SSL offloading, and iRules while following DoD timelines and maintaining documentation. This role requires TS/SCI clearance and US citizenship.

Qualifications

• Hands-on experience with F5 BIG-IP systems, including load balancers and SSL offloading.
• Strong knowledge of networking protocols and F5 iRules for traffic management.
• Experience with Azure DevOps boards, Scrumban, or Agile methods under tight DoD timelines.
• DoD 8140/8570 certification (e.g., CompTIA Security+).
• Active TS/SCI Security Clearance.
• US citizenship is required.
• Willingness to travel up to 10% to OCONUS locations.

Responsibilities

• Configure, deploy, and maintain F5 BIG-IP systems (load balancers, ADCs) including SSL offloading.
• Design traffic management rules (GSLB/LSLB) and manage keys/certificates.
• Manage F5 iRules and traffic management policies for application delivery.
• Assist in F5 upgrades, patches, and general troubleshooting to ensure functionality.
• Design and implement new F5 solutions to improve delivery, scalability, and security.
• Monitor health and performance; provide optimization recommendations.
• Collaborate with network, systems, and security teams to integrate F5 solutions.
• Maintain documentation for configurations, changes, and SOPs.
• Utilize Azure DevOps to track tasks, backlogs, and requests.
• Support operational readiness with on-call coverage and after-hours support.

Skills

F5 BIG-IP

Networking protocols

iRules

Azure DevOps

Documentation

DoD 8140/8570

TS/SCI clearance

US citizenship

Education

BA/BS

HS/GED

MS

Tools

tmsh

iControl REST

Ansible

Terraform

F5 Analytics

Job description

Description

Transform technology into opportunity as an F5 Administrator at Leidos. You will play a crucial role in configuring, maintaining, and troubleshooting F5 load balancing and traffic management systems to ensure high availability, reliability, and performance of critical applications and services for USCENTCOM on the CITS contract.

The F5 Administrator is responsible for the configuration, deployment, and maintenance of F5 BIG-IP systems, ensuring the optimal performance, security, and availability of critical applications. This role involves hands‑on technical work, troubleshooting complex F5-related issues, and collaborating with various IT teams to integrate F5 solutions within the broader network and infrastructure environment. The F5 Administrator will contribute directly to the mission success of USCENTCOM by maintaining robust and efficient application delivery services.

Primary Responsibilities

F5 System Configuration & Maintenance

• Configure, deploy, and maintain F5 BIG-IP systems, including Load Balancers, Application Delivery Controllers (ADCs), and SSL offloading configurations.
• Design and implement traffic management rules, including global server load balancing (GSLB) and local server load balancing (LSLB).
• Manage F5 configurations for SSL/TLS offloading, including key and certificate management for secure communication.
• Configure and maintain F5 iRules to manage application traffic and provide enhanced functionality for specific use cases.
• Assist in performing F5 system upgrades, patches, and troubleshooting tasks to ensure continued system functionality.
• Assist in the design and implementation of new F5 solutions to improve application delivery, scalability, and security.

Troubleshooting & Performance Optimization

• Troubleshoot and resolve F5-related performance and availability issues, ensuring minimal service disruptions.
• Monitor F5 systems for health and performance, providing proactive recommendations for optimization.
• Support incident response and root cause analysis for any F5-related issues impacting critical applications or services.
• Participate in capacity planning for F5 devices and the overall infrastructure to meet growing demand and service requirements.
• Continuously evaluate and recommend enhancements to optimize the performance, security, and availability of applications.

Operational & Agile Management

• Execute daily F5-related tasks, ensuring compliance and meeting deployment deadlines for application delivery services.
• Utilize Azure DevOps (ADO) boards to track active operational tasks, backlog items, and customer requests related to F5 configurations and deployments.
• Participate in Scrumban planning and review sessions to contribute to the prioritization of F5 operational efforts based on mission urgency, USCENTCOM directives, and service level agreements (SLAs).

Documentation & Collaboration

• Develop and maintain documentation for F5 configurations, change management, troubleshooting guides, and standard operating procedures.
• Collaborate with network, systems, and security teams to integrate F5 solutions into the broader network and infrastructure environment.
• Provide technical support and guidance to other IT teams and end-users regarding F5 traffic management solutions.
• Collaborate with vendors to resolve hardware or software-related issues and elevate problems when necessary.
• Work with multiple teams to design and implement end-to-end application delivery solutions.

Operational Readiness & Improvement

• Ensure continuous coverage for critical operations by maintaining an up-to-date on‑call roster for personnel assigned to after‑hours or emergency support.
• Identify, evaluate, and recommend opportunities to optimize F5 operational efficiency and application delivery health through automation, custom scripting (e.g., iControl REST, tmsh), and modernized F5 technologies.

Education and Experience Requirements

• BA/BS with 8+ years of prior relevant experience
• HS/GED with 10+ years of relevant experience
• MS with 3+ years of relevant experience

Basic Qualifications

• Hands‑on experience with F5 BIG‑IP systems, including Load Balancers, ADCs, and SSL offloading.
• Deep proficiency in configuring and managing F5 systems for high availability, disaster recovery, and scalability. Strong knowledge of networking protocols, including TCP/IP, HTTP, HTTPS, DNS, and SSL/TLS. Experience with F5 iRules and traffic management policies for application delivery. Ability to troubleshoot complex F5 issues, including performance, connectivity, and security problems.
• Experience managing workloads and agile tasking using Azure DevOps (ADO) boards, Scrumban, or related Agile methodologies under tight DoD operational timelines. Excellent documentation skills for creating and maintaining configuration guides, troubleshooting steps, and change management records.
• Applicable DoD 8140 or DoD 8570 Certification (e.g., CompTIA Security+).
• Active TS/SCI Security Clearance
• US citizenship required.
• Willingness and capable of supporting USCENTCOM exercises or operational requirements, with potential for up to 10% travel to OCONUS locations.

Preferred Qualifications

• F5 Certified Administrator (F5‑CA), F5 Certified Technology Specialist (F5‑CTS), ITIL 4 Foundation Certification.
• Familiarity with monitoring and reporting tools for F5 system performance (e.g., F5 Analytics). Experience with F5 integration in hybrid cloud or multi‑cloud environments. Familiarity with automation and orchestration tools for F5 management (e.g., Ansible, Terraform).
• Prior experience supporting USCENTCOM and familiarity with its mission and operations.

If you’re looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We’re not hiring followers. We’re recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We’re already at step 30 — and moving faster than anyone else dares.

Original Posting

August 28, 2026

Pay Range

Pay Range $92,300.00 - $166,850.00

The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.

About Leidos

Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $16.7 billion for the fiscal year ended January 3, 2025. For more information, visit www.Leidos.com.

Pay and Benefits

Pay and benefits are fundamental to any career decision. That’s why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available at www.leidos.com/careers/pay-benefits.

Securing Your Data

Beware of fake employment opportunities using Leidos’ name. Leidos will never ask you to provide payment‑related information during any part of the employment application process (i.e., ask you for money), nor will Leidos ever advance money as part of the hiring process (i.e., send you a check or money order before doing any work). Further, Leidos will only communicate with you through emails that are generated by the Leidos.com automated system – never from free commercial services (e.g., Gmail, Yahoo, Hotmail) or via WhatsApp, Telegram, etc. If you received an email purporting to be from Leidos that asks for payment‑related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at [e-mail].

If you believe you are the victim of a scam, contact your local law enforcement and report the incident to the U.S. Federal Trade Commission.

Commitment to Non-Discrimination

All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.