Senior Network Security Engineer

Clearance Level
Interim Secret
Cyber Security
Leesburg, Virginia

REQ#: RQ127894

Travel Required: Less than 10%
Requisition Type: Regular

We are looking for a Senior Network Security Engineer. This position supports a Civilian Agency Cyber Security Operations Center (SOC) organization protecting the network security of tens of thousands of users. 

The Senior Network Security Engineer requires the ability to:

  • Provide the technical expertise required to modify (upgrade) and/or replace existing Cisco Firepower IDS monitoring devices as needed.
  • Install, maintain, monitor and troubleshoot Firepower IDS sensor devices.
  • Maintain configuration control of all signatures and test them before being deployed in the operational environment.
  • Evaluate and test all upgrades and patches prior to deployment in production.
  • Identify requirements for additional sensor locations which will enhance the situational awareness capability.
  • Coordinate and assist local personnel in the installation of network intrusion detection systems.
  • Support the DOT in the preparation of site coordination reports for each installation.
  • Develop IDS Life Cycle Plan (LCM) for all IDS, including support with testing of new IDS systems.
  • Lead configuration management and develop processes to track system and signature changes.
  • Lead deployment planning and implementation tasks.
  • Any other duties as requested by the Contracting Officer Representative and SOC management.

Qualities/Additional info: Senior Network Security Engineer should be a proven team player with excellent oral and written communications skills, and a fine attention to detail.  He/she should also be a self- starter, capable of working on projects independently, if required. Extremely effective oral and written communications skills are necessary to present strategy and status information to the client in both formal and informal review settings.  Frequent interaction with government client is required.

Occasional local travel. Infrequent

Job Qualifications:

Required Education and Experience:


  • Bachelor's degree in Computer Science or Information systems.


  • Minimum Ten (10) years of relevant professional experience.


  • Minimum Six (6) years of experience in IDS tool administration.

Preferred Experience:

  • Experience with the following;
    • Cisco Firepower or Sourcefire IDS device configuration management.
    • Experience with information security devices (e. g., firewalls, and intrusion detection/prevention systems) and applications (e.g. security information management tools (e.g., NetForensics, ArcSight, Splunk)
    • Experience with business processes, capability maturity model, change management, or process improvement.
    • Experience working in a network security environment, such as a Security Operations Center (SOC)

Level of Clearance Required: Department of Defense Secret

US Citizenship Required:  Yes      

About Our Work

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.

COVID-19 Vaccination

GDIT does not have a vaccination mandate applicable to all employees. To protect the health and safety of its employees and to comply with customer requirements, however, GDIT may require employees in certain positions to be fully vaccinated against COVID-19. Vaccination requirements will depend on the status of the federal contractor mandate and customer site requirements.

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.