Sr. Network Specialist- F5

Clearance Level
Network Engineering
Washington, District of Columbia

REQ#: RQ65260 Sr. Network Specialist- F5 (Open)

Travel Required: None
Public Trust: Other
Requisition Type: Regular
Job Description
  • Serve as a subject matter expert in supporting F5 load balancers with Big-IP LTM, DNS, AFM, APM and ASM
  • Perform daily operational tasks submitted by customers through Remedy ticket system
  • Prepare network or infrastructure Visio topology diagrams, write Standard Operating Procedures, maintenance plans and provide status reports as required, participate in data calls and other operational and maintenance tasks
  • Troubleshoot network problems, network device configurations and coordinate with various department administrators to facilitate connectivity issue resolution
  • Design technical solutions
  • Participate in the development and support of customer technical requirements
  • Champion a collaborative, team-based environment, sharing standard methodologies and success and building positive relationships
  • Can deliver technical presentations to include whiteboards at CxO level through to detailed technical staff.
  • System administrator skills with UNIX, Microsoft or application knowledge
  • Proven grasp of LAN and WAN networking protocols and technologies, including switching, routing, and security (e.g., Layer 4-7, firewall, DDoS, etc)
  • Industry and F5 Networks-targeted technologies i.e. Application Delivery Control, Application Access Control, SSL intercept/inspection, and Web Application Firewall Security.
  • Various scripting and programming languages and operating systems (tcl, python, Assembly, C, Javascript, Node.js, Linux OS, etc.)


Requires 10+ years overall IT experience working in a large enterprise environment with the internal processes of a federal governmental structure and its mandates

  • Excellent attention to detail
  • Excellent communications skills and ability to interact with clients
  • Experience with Cisco network technologies
  • Significant experience with supporting and maintaining F5 Big-IP load balancers to include set-up, maintenance, upgrades and replacement of the latest generation of F5s
  • Extensive experience with Big-IP LTM and ASM modules in a large shared environment
  • Demonstrate an ability to craft and understand iRules
  • Experience with TCPDump, Wireshark and analyzing network traffic
  • Demonstrate a solid understanding of the OSI and TCP/IP network models and provide examples
  • Experience working in a large SDLC environment
  • Experience analyzing security impacts and risks to websites, explain crafting ASM policies with examples.
  • Experience in custom SSL, ciphers, and LTM traffic performance optimization
  • Experience with supporting and maintaining wireless networks
  • Intermediate knowledge of networking and systems administration; and the ability to troubleshoot problems


  • Security + Certification
  • F5 Certified Technology Specialist or F5 Certified Solution Expert
  • 10 years of relevant work experience and a bachelors degree from an accredited university. 
  • A postgraduate degree from an accredited university may substitute for 6 years of experience.
  • Four (4) years’ experience (in addition to minimum experience requirements) to be substituted for a Bachelors degree.
  • Extensive experience troubleshooting, managing and monitoring the health of routers and switches;
  • Experience deploying, managing, and troubleshooting network systems, switching, and routing protocol standards such as: TCP/IP, MPLS, OSPF, BGP, SDN, and 802.1x.
  • Experience managing and troubleshooting DNS, DHCP, IPAM, and NTP in a large multi-site environment
  • Experience managing network equipment
  • Experience using network management and analysis tools such as SNMP probes, network taps, and traffic analyzers
  • Experience documenting network topology using Visio
  • Creating and documenting processes and creating work instructions
  • Experience working as a part of a large team and working directly with customers
  • Excellent hardware troubleshooting experience.
  • Experience with supporting teleworkers and remote access technologies
  • Strong oral and written communication skills
  • Strong customer service skills
  • Experience utilizing Remedy ITSM system
  • Experience with Solarwinds NMS products
  • Experience creating scripts to automate routine administration tasks
  • Experience with network security, including firewall, IDS/IPS, VPN, and vulnerability remediation

We are GDIT. The people supporting some of the most complex government, defense, and intelligence projects across the country. We deliver. Bringing the expertise needed to understand and advance critical missions. We transform. Shifting the ways clients invest in, integrate, and innovate technology solutions. We ensure today is safe and tomorrow is smarter. We are there. On the ground, beside our clients, in the lab, and everywhere in between. Offering the technology transformations, strategy, and mission services needed to get the job done.

GDIT is an Equal Opportunity/Affirmative Action employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or veteran status, or any other protected class.