TSS Network Security Manager

Clearance Level
Information Security
Bethesda, Maryland
Hybrid Workplace
Key Skills For Success


Cisco Networking Technologies

Network Administration

Network Engineering

Network Management

REQ#: RQ147568
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

Own your career as a TSS Network Security Manager at GDIT. Here, you’ll have the opportunity to build strong lines of cyber defense using cutting-edge technologies. Your work in cyber security at GDIT will have an impact on securing our clients’ missions and ensuring we anticipate the threats of tomorrow.

At GDIT, people are our differentiator. As a TSS Network Security Manager, you will help ensure today is safe and tomorrow is smarter. Our work depends on Deputy Network Security Manager joining our team to be responsible for the network security artifacts and supports the ISSO to achieve and maintain the system Authorities to Operate (ATO). This individual is responsible for the management and provisioning of security services and service restoration in compliance to customer SLAs.


  • Deputy Manager for a team of 15+ Network Security Engineers who are responsible for the infrastructure and administration of Cisco ASA Firewalls, Network Access Control, Remote Access, and Load Balancing solutions
  • Managing security documentation requirements to maintain an ATO and fulfill continuous monitoring program requirements
  • Understand design/solutions for network infrastructure/architecture
  • Ensuring that the program is compliant with Federal system security controls to ensure compliance with NIST policies
  • Developing, distributing and/or presenting all security-related information and training across the Network Services program
  • Leading the response to any/all network security incidents and events
  • Assisting in troubleshooting and problem-solving a wide variety of client/user network security issues and acting as an escalation point for these issues
  • Managing and coordinating lifecycle device management of network security systems
  • Developing and maintaining an effective and productive relationship with government security personnel and their stakeholders to ensure client satisfaction with the overall security posture
  • Producing weekly activity report and monthly status reports, including accomplishments, planned activities, performance, etc.
  • Conducting routine review of policies and procedures to lead to process, performance, or security posture improvement
  • Hiring and performance management for employees and subcontractors
  • Maintaining relationships with key Third-Party software/hardware vendors to provide support for the security infrastructure as needed


  • Bachelor’s Degree in Computer Science, Information Systems, Engineering, and 5+ years of relevant experience (or equivalent years of experience)
  • Network Security experience
  • One or more of the following certifications: CISSP, CCNP, CCIE
  • Experience supporting the administration of Cisco ASA Firewalls, Network Access Control, Remote Access, and Load Balancing solutions
  • Experience with ensuring program compliance with Federal system security controls and NIST policies
  • Must be able to obtain a NIH Public Trust


  • Experience leading a Network Security team
  • Experience supporting the administration of Cisco ASA Firewalls, Network Access Control, Remote Access, and Load Balancing solutions
  • CCNP/CCDP, CCIE certifications
  • Cisco SISE certification
  • 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


  • 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

5 + years of related experience

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

Travel Required

Less than 10%


U.S. Citizenship 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 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.