Sr. Network Engineer - F5

GTN Technical Staffing
Chicago, IL

Sr. Â Network Engineer - F5 HIGHLIGHTS
Location: Chicago, IL/ New York, NY/Â Phoenix, AZ Â (Hybrid)Â
Position Type: Â Direct HireÂ
Hourly / Salary: Â BOE

Our client is looking for a Sr. Network Engineer - F5Â to join their team!

Overall Purpose:
This position designs and maintains the hardware and software necessary for a hardened computer network. Provide high level technical analysis with a specialty in Local Area Networks (LANs) or Wide Area Networks (WANs). Focus on network design, performance, maintenance, problem resolution and hardware configuration

Essential Functions: Â
  • Design, configure, test, and maintain LAN/WAN equipment and related services for Web support
  • Lead in the diagnosis, and resolve complex network problems
  • Select network devices, and set network policies that adhere to Security guidelines
  • Create and maintain comprehensive documentation for all implemented networks
  • Maintain and support company’s LAN/WAN environment and Web Hosting Services
  • Direct the maintenance, problem resolution and hardware configurations
  • Direct the maintenance of all Firewalls and approve requested rule changes in the Firewall Review Board meetings
  • Participate in 24x7 on-call and escalations, ensuring that Networking staff are fully trained to support all aspects of the network.
  • Obtain and maintain required certifications
  • Act as SME in the definition and policy making of network and security protocols.
  • Comply with all security policies and procedures, to ensure that the highest level of system and data confidentiality, integrity and availability is maintained.
  • Support the company’s commitment to risk management and protecting the integrity and confidentiality of systems and data.
  • The above job description is not intended to be an all-inclusive list of duties and standards of the position. Incumbents will follow instructions and perform other related duties as assigned by their supervisorÂ
Essential Functions for Load Balancing/ F5 Focus Engineers:Â
  • Create and troubleshoot iRules and apply rules within the F5 appliances.Â
  • Troubleshoot complex and escalated issues and debug services using problem determination tools and logs provided with the F5 appliances.Â
  • Configure and Manage F5 using TMSH and BASH environments.Â
  • Plan and execute firmware upgrades and system management deployments for major and minor upgrades in AWS Cloud and On-Prem VM/ADC devices.Â
  • Â
Minimum Qualifications
  • Education or experience equivalent to a bachelor’s degree in computer science or engineering
  • Minimum 7 years work experience
  • Hands-on experience implementing and administrating network devices, setting and maintaining policies and rights within a network environment
  • Advanced knowledge with any of the following equipment or disciplines:
    • Load balancers/ F5
    • Firewalls
    • Cisco and network switches
    • Cisco routers
    • Cisco VPN
    • Palo Alto
    • Linux/Windows Servers
    • Telecom Services
  • Strong understanding of common network monitoring and security utilities, Data Center technologies, securing local and remote networks and routing protocols (i.e. BGP, OSPF, EIGRP).
  • A thorough understanding of the OSI network model, Ethernet, and TCP/IP networking
  • Basic understanding of virtualization and its impact on network designs. Familiar with ESX and vSwitch technology.
  • A practical level of experience implementing and administrating common TCP/IP-based services, including DNS, DHCP, SFTP, SSH, SSL, SMTP, etc.
  • Troubleshooting focused on determining hardware vs. software, hardware vs. firmware, software vs. operating system, network vs. application/systems, and patterned vs. non-repeatable problems
  • Ability to prioritize and multitask
  • Willingness to learn new technologies and maintain industry knowledge
  • Excellent oral and written communication skills
  • Excellent interpersonal skills
Minimum Qualifications for Load Balancing/ F5 Focus Engineers:Â
  • Full understanding of F5 processes and services required to maintain L1 thru L7 environments on the F5 using APM, ASM, iRule, and LTM modules.Â
  • Required understanding and practical application of BigIQ deployment and management using AS3.Â
  • Understanding of MTLS and Cert management on F5.Â
  • Strong understanding of Ansible Automation Platform and Git.Â
  • Hands on experience with TMSH and Bash environments on F5.Â
  • Advanced experience creating and analyzing TCP level events using TCPDump and WiresharkÂ
Preferred Qualifications
  • Additional education and/or experience is preferred.
  • Current Cisco, Palo Alto, Juniper or equivalent common industry certification, i.e. CCNP, CCIE, JNCIP
Preferred Qualifications for Load Balancing/ F5 Focus Engineers:
  • BigIQ Training using GUI with AS3 ExtensionÂ
  • 301b+ Level QualificationsÂ
  • AWS Cloud Certs with background in CFT, DO, and Ansible DeployÂ
Â

"We are GTN – The Go To Network"

Posted 2025-07-29

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