Sr. Network Engineer (F5, ASA, and Palo Alto)

Clearance Level
Top Secret/SCI
Network Engineering
Fort Belvoir, Virginia
Onsite Workplace
Key Skills For Success

Application Delivery Networking

Network Repair

Web Application Firewall (WAF)

REQ#: RQ167604
Public Trust: None
Requisition Type: Regular
Your Impact

Own your opportunity to work with the largest government agency in the nation. Make an impact by advancing the Department of Defense’s mission to keep our country safe and secure.

Job Description

Network Engineer Senior Advisor – TS/SCI required

Transform technology into opportunity as a Sr. Network Engineer Advisor with GDIT. A career in enterprise IT means connecting and enhancing the systems that matter most. At GDIT you’ll be at the forefront of innovation and play a meaningful part in improving how agencies operate.

At GDIT, people are our differentiator. As a Sr. Network Engineer Advisor you will help ensure today is safe and tomorrow is smarter. Our work depends on Sr. Network Engineer Advisor joining our team to support the US Army Intelligence and Security Command (INSCOM).


  • Responsible for the installation, configuration and maintenance of the F5 BIG IP infrastructure supporting the INSCOM network. 
  • 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 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 GISA and INSCOM 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.)


  • Education: High School Diploma/GED with 10 years of related experience, or Associate’s Degree with 8 years of experience, or Bachelor’s Degree with 6 years of experience, or Master’s Degree with 4 years of experience
  • Experience: Requires 5+ years overall IT experience working in a large enterprise environment with the internal processes of a federal governmental structure and its mandates
  • Required Technical Skills
    • 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
  • Clearance Level: TS/SCI
  • Required Certification(s):
    • IAT II 8570 Baseline Certification - Sec+ E or equivalent
    • One of the following Computing Environment Certifications:
    • F5 Certified Solution Expert
  • Location: On Customer Site
  • US Citizenship: Required
  • Additional:
    • Candidates must be willing and able to attain a CI Polygraph for certain positions as determined by the contract


  • 401K with company match
  • Comprehensive health and wellness packages
  • Internal mobility team dedicated to helping you own your career
  • Professional growth opportunities including paid education and certifications
  • Cutting-edge technology you can learn from
  • Rest and recharge with paid vacation and holidays




Work Requirements
Years of Experience

10 + years of related experience

* may vary based on technical training, certification(s), or degree


F5-Certified Systems Engineer (F5-SEA), F5 ARX, V5.X - F5

CompTIA - Security+ - CompTIA

Travel Required

Less than 10%


U.S. Citizenship Required

About Our Work

We are GDIT. A global technology and professional services company that delivers consulting, technology and mission services to every major agency across the U.S. government, defense and intelligence community. Our 30,000 experts extract the power of technology to create immediate value and deliver solutions at the edge of innovation. We operate across 30 countries worldwide, offering leading capabilities in digital modernization, AI/ML, Cloud, Cyber and application development. Together with our clients, we strive to create a safer, smarter world by harnessing the power of deep expertise and advanced technology.

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.