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Sr. Network Engineer - F5

Job DescriptionJob Description

Sr. Network Engineer - F5

HIGHLIGHTS
Location: Chicago, IL (Hybrid) 
Position Type: Direct Hire 
Hourly / Salary: $120,000 - $140,000

Our client is looking for a Sr. Network Engineer - F5 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:  

  • 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 supervisor 

Essential Functions for Load Balancing/ F5 Focus Engineers: 

  • Create and troubleshoot iRules and apply rules within the F5 appliances. 
  • Troubleshoot complex and escalated issues and debug services using problem determination tools and logs provided with the F5 appliances. 
  • Configure and Manage F5 using TMSH and BASH environments. 
  • Plan and execute firmware upgrades and system management deployments for major and minor upgrades in AWS Cloud and On-Prem VM/ADC devices. 
  •  

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, HTTP, HTTPS, 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: 

  • Full understanding of F5 processes and services required to maintain L1 thru L7 environments on the F5 using APM, ASM, iRule, and LTM modules. 
  • Required understanding and practical application of BigIQ deployment and management using AS3. 
  • Understanding of MTLS and Cert management on F5. 
  • Strong understanding of Ansible Automation Platform and Git. 
  • Hands on experience with TMSH and Bash environments on F5. 
  • Advanced experience creating and analyzing TCP level events using TCPDump and Wireshark 

Qualifications

  • Additional education and/or experience is .
  • Current Cisco, Palo Alto, Juniper or equivalent common industry certification, i.e. CCNP, CCIE, JNCIP

Qualifications for Load Balancing/ F5 Focus Engineers:

  • BigIQ Training using GUI with AS3 Extension 
  • 301b+ Level Qualifications 
  • AWS Cloud Certs with background in CFT, DO, and Ansible Deploy 

 

"We are GTN – The Go To Network"

Company DescriptionWho We Are
GTN is the leader in technical staffing, leveraging innovation to drive next- recruiting to Fortune 2000 companies.

What We Do
We provide Scalable Technical Staffing solutions encompassing SOW, staff augmentation, and direct hire placement for Fortune 2000 companies, with niche service offerings in Cyber Security, Digital, Field Services, and Professional Services. Our recruiting teams are specialized, certified, and have endured rigorous technical boot camps and ongoing required educational courses and meetups.

What Proof We Have
We have experience in scalable IT Staffing since the year 2000. Our IT experts have helped Fortune 2000 corporations embrace the cybersecurity and digital space, with many of our experts remaining on contract with clients for 8+ years. Our staffing experts have been engaged to speak at cybersecurity conferences, and our teams are certified and specialize in divisions focused around cyber, digital, field, and professional services.

Why People Want It
Our valueCompany DescriptionWho We Are\r\nGTN is the leader in technical staffing, leveraging innovation to drive next- recruiting to Fortune 2000 companies.\r\n\r\nWhat We Do\r\nWe provide Scalable Technical Staffing solutions encompassing SOW, staff augmentation, and direct hire placement for Fortune 2000 companies, with niche service offerings in Cyber Security, Digital, Field Services, and Professional Services. Our recruiting teams are specialized, certified, and have endured rigorous technical boot camps and ongoing required educational courses and meetups.\r\n\r\nWhat Proof We Have\r\nWe have experience in scalable IT Staffing since the year 2000. Our IT experts have helped Fortune 2000 corporations embrace the cybersecurity and digital space, with many of our experts remaining on contract with clients for 8+ years. Our staffing experts have been engaged to speak at cybersecurity conferences, and our teams are certified and specialize in divisions focused around cyber, digital, field, and professional services.\r\n\r\nWhy People Want It\r\nOur value

Sr. Network Engineer - F5

Chicago, IL
Full time

Published on 09/22/2025

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