TSS Network Security Engineer

Clearance Level
Cyber Engineering
Bethesda, Maryland
Hybrid Workplace
Key Skills For Success

Cisco Technologies

Cyber Security

Network Access Control (NAC)

Network Security Technologies

REQ#: RQ140084
Public Trust: BI Full 6C (T4)
Requisition Type: Regular
Your Impact

Own your opportunity to manage the network that makes mission success possible. Make an impact by using your skills to deliver “One GDIT Network” for our clients.

Job Description

A career as a Network Systems Engineer at GDIT means owning every opportunity to help support and advance our clients’ missions. At GDIT, network and cyber security is embedded into every aspect of what we do and we’re constantly evolving our cyber solutions to overcome our clients’ biggest challenges.

The Network Security Engineer is responsible for the configuration, deployment, and management of the customer’s NAC solution in a 24x7x365 environment. The engineer is responsible for but not limited to monitoring, configuration changes, accounts, and software updates for the customer’s NAC, ISE and IDS/IPS solutions. The engineer must be able to analyze, troubleshoot, and remediate issues within the enterprise. The engineer will also work closely with other teams to ensure that these solutions are performing to standard.


  • Administration of LAN technologies of Cisco Switches and Cisco ASA Firewalls
  • Administration of Network Access Control systems including but not limited Cisco ISE, Forescout, Cisco ACS, RSA, Cisco AnyConnect, Gigamon, IDS/IPS.
  • Assist in troubleshooting and problem solving a wide variety of client/user issues and act as an escalation point for LAN/NAC related issues
  • Work closely with other IT functional teams to ensure cohesive support and strategies across the IT organization
  • Execute project plan as authorized 


  • Provide daily support for tickets: service requests, incidents, problems, and tasks
  • Execute tasks to support projects
  • Provide regular updates to tickets
  • Produce daily/weekly status reports
  • Develop and execute change request plans


  • BS degree in Computer Science, Information Systems or equivalent and 8 years of experience implementing and maintaining Network Access Control technologies (Cisco IDS/IPS, ISE, Forescout, Cisco AnyConnect, etc.)  OR  12 years of experience implementing and maintaining Network Access Control technologies (Cisco IDS/IPS, ISE, Forescout, Cisco AnyConnect, etc.)
  • Experience with mid to large scale implementations of Network Access Control technologies.
  • U.S. Citizenship is required.


  • Experience with network infrastructure in enterprise datacenter solutions.
  • BS degree in Computer Science, Information Systems or equivalent.
  • Cisco CCNA/CCNA/Security, CCNP/CCNP Security, CCIE certifications
  • Cisco SISE certification
  • Forescout FSCA/FSAA/FSCE certifications
  • Experience with Cisco wireless LAN controllers.
  • Experience with Forescout security products.
  • Experience configuring Cisco ASAs and switches.
  • Experience configuring 802.1X.
  • Experience configuring and implementing network segmentation including VLANs and MPLS.
  • Experience with multiple end-system operating systems including Windows, Linux, Mac OS, and Apple IOS.
  • Experience with ServiceNow and Visio is an asset


  • Excellent written and verbal communication skills.
  • Ability to explain and elaborate on technical details.
  • Ability to self-direct, take initiative
  • Ability to multitask in a fast-paced IT environment.


  • Full-flex work week to own your priorities at work and at home
  • 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

8 + years of related experience

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

Travel Required


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.