F5 Network Engineer

Addison Group; Dallas (TX); On-site; USD 120,000 - 140,000; Full time

Benefits offered by this job

Medical, dental, vision

Employer-paid family health coverage

401(k) with 10% employer contribution

5% employee contribution

Generous PTO

Job summary

Addison Group is seeking an experienced F5 Network Administrator to support a modernized data center. The role centers on managing F5 BIG-IP platforms, load balancing, security, and automation in a 5+ year networking environment.

The candidate will work onsite in Dallas or Oklahoma City, collaborating with infrastructure, systems, and security teams to ensure uptime and optimal delivery of applications.

Qualifications

• Minimum 5 years of professional networking experience.
• At least 1 year of F5 administration in production.
• Broad knowledge of enterprise routing, switching, and data center networks.
• Hands-on with F5 BIG-IP modules: LTM, APM, WAF/ASM, DNS/GTM.
• Understanding of TCP/IP, HTTP/HTTPS, DNS, and L4-L7 networking.
• Experience with infrastructure automation, configuration tools, or REST APIs.
• Knowledge of certificate management, PKI, and secure network design.
• Degree not required; relevant experience prioritized.

Responsibilities

• Administer F5 BIG-IP services across traffic management, access, WAF, and DNS functions.
• Create and maintain load-balancing configurations with virtual servers and pools.
• Write iRules and automate via Ansible, Terraform, and APIs.
• Manage SSL/TLS certificates and renewal processes.
• Tune WAF controls, bot protection, and DDoS defenses.
• Support F5 Distributed Cloud services and cloud load balancing.
• Diagnose connectivity and delivery issues and coordinate upgrades.
• Support routing, switching, and data center operations.
• Collaborate with systems, security, and applications teams; maintain documentation.
• Maintain technical documentation and best practices for F5 configurations.

Skills

F5 BIG-IP

Ansible

Terraform

APIs/REST

SSL/TLS

WAF/ASM

DNS/GTM

TCP/IP

Routing & Switching

iRules

Tools

F5 BIG-IP LTM

F5 BIG-IP APM

F5 WAF/ASM

F5 DNS/GTM

Job description

Job Title:

F5 Network Administrator

Location (city, state):

Oklahoma City, Oklahoma, or Dallas, Texas

Direct Hire:

Must be authorized to work in the United States now and in the future without assistance

Pay:

$120,000-$140,000 annually, plus short-term and long-term incentive opportunities

Work Schedule:

Full-time, onsite five days per week.

Benefits:

This position is eligible for medical, dental, vision, and 401(k). Additional highlights include employer-paid family health coverage, a 10% employer 401(k) contribution with a 5% employee contribution, and generous PTO

An established energy organization is expanding its infrastructure team and seeking an experienced networking professional to support a modernized data center environment. This newly created position will serve as the primary technical resource for F5 platforms while contributing to broader network operations. The role combines hands-on application delivery, load balancing, and security responsibilities with routing, switching, and data center networking.

The ideal candidate brings practical production experience with F5 and can independently manage the platform while partnering with infrastructure, systems, and security teams.

Key Responsibilities:

• Administer F5 BIG-IP services across traffic management, application access, web application protection, and DNS functions.
• Create and maintain load-balancing configurations, including virtual servers, server pools, health checks, and traffic-handling rules.
• Write and refine iRules and streamline platform administration through Ansible, Terraform, and API-based automation.
• Maintain secure application connections through SSL/TLS configuration and certificate renewal management.
• Adjust web application firewall controls, bot protection, and DDoS defenses to address evolving threats.
• Assist with F5 Distributed Cloud services, including application protection, cloud load balancing, and Customer Edge deployments.
• Diagnose connectivity and application delivery issues, evaluate platform performance, and coordinate upgrades.
• Support routing, switching, and network operations within the data center.
• Work closely with systems administrators, security professionals, and application teams to resolve issues and plan changes.
• Maintain technical documentation and provide guidance on F5 configuration and operational practices.

Qualifications:

• At least five years of professional networking experience, with approximately five to ten years preferred.
• A minimum of one year with F5 administration as a primary responsibility in a production environment.
• Broad technical knowledge of enterprise routing, switching, and data center networks.
• Hands-on familiarity with F5 BIG-IP modules such as LTM, APM, WAF/ASM, and DNS/GTM.
• Understanding of TCP/IP, HTTP/HTTPS, DNS, and networking across Layers 4-7.
• Experience with infrastructure automation, configuration tools, or REST APIs.
• Knowledge of certificate management, PKI, and secure network design.
• Experience with F5 Distributed Cloud or comparable cloud application delivery services.
• A degree is not required; relevant technical experience is the priority.