Sotera Defense Solutions

Network Engineer- Threat Management Gateway

3 months ago
Information Technology
Top Secret


Sotera Defense Solutions is currently seeking a Network Engineer-Threat Management Gateway with a minimum of a current Top Secret clearance located in Quantico, VA.


Responsibilities include:

  • Maintain the overall health of technologies associated with Gateway and Firewall Services.
  • Provide   support for Gateway and Firewall related technologies.
  • Monitor the health of Gateway and Firewall Services with Government-provided event management tools.
  • Resolve TMG/F5 tickets escalated from the service desk
  • Messaging Status Report (to be incorporated into the EDM Weekly Status Report, CDRL A00A) in accordance with required response times.
  • Provide documentation, guidance and instruction to the Tier 1 service desk for handling standard Gateway and Firewall Services related incidents, work orders and service requests.
  • Submit and execute Gateway and Firewall Services related Request for Change (RFC) tasks.
  • Coordinate incident tickets between Tier II and III sections as well as Engineering and other sections.
  • Support the change management process by submitting requests through Change Approval Board, participating in a Change Review Board, and providing information to support decision making.
  • Escalate issues to third party product vendors.
  • Implement   monitoring tool thresholds   and conduct proactive event remediation.
  • Monitor and implement, upon management approval, guidance from the USCYBERCOM.
  • Configure   Secure Socket Layer access and logging on the devices.
  • Provide analysis   and remediation for DISA Security Technical Implementation
  • Guidelines (STIG) for all responsible technologies in preparation for annual Commanders Cyber Readiness Inspections (CCRI).


Minimum requirements include:

  • BS in related field (Preferred)
  • A minimum of 5 years of experience in network engineering, security and crendential management
  • Minimum of Top Secret clearance, TS/SCI preferred
  • Experience with VMWare
  • Experience with F5 1500 and 4200 series Local Traffic Manager as a reverse proxy for all client external facing websites
  • IAT III - (CISA, GCIH, GCED, CASP or CISSP (Associate)
  • F5 Technology Specialist Certified



  • F5 Architecture Design for Microsoft Exchange
  • F5 Big-IP Access Policy Manager
  • F5 Big-IP Local Traffic Manager
  • F5 Big-IP Global Traffic Manager
  • F5 Certified Solutions Expert (CSE)
  • The Engineer shall provide Tier III level Security Application Front End support. 
  • The Engineer shall configure F5 Big-IP platforms and support Microsoft Threat Management Gateway (TMG) servers for access from the internet to internal Marine Corps application servers.
  • The Engineer shall provide capabilities in supporting Boundary Security Devices, Active Directory, and firewalls to provide F5, TMG and Wireless Application Protocol (WAP) services.  
  • The Engineer shall configure   the F5 services to support Windows Server, Exchange, SharePoint, networking, PKI/SSL and other technologies as applicable.
  • The infrastructure is a mixed environment of VMware based and physical based servers. These tasks require capabilities in VMware Virtualization, and VMware cloud to perform the specialized EDM Boundary Security Device tasks.



 Engineer site with 0%-10% travel possible.  Possible off-hours work to support releases and outages. General office environment.  Work is generally sedentary in nature, but may require standing and walking for up to 10% of the time.  The working environment is generally favorable.  Lighting and temperature are adequate, and there are not hazardous or unpleasant conditions caused by noise, dust, etc.  Work is generally performed within an office environment, with standard office equipment available.



About The Organization

Sotera Defense Solutions, Inc. (Sotera) is an agile, mid-size national security technology company that delivers innovative systems, solutions and services in support of the critical missions of the Intelligence Community, Department of Defense, Department of Homeland Security and federal law enforcement agencies charged with ensuring the safety and security of our nation. Our 1,200 employees are focused on delivering essential counterterrorism, cyber operations, intelligence, data analytics, C4ISR and force mobility solutions to our customers throughout the national security community.


Sotera Defense Solutions is an equal opportunity/affirmative action employer. All qualified applicants will receive consideration for employment without regard to sex, gender identity, sexual orientation, race, color, religion, national origin, disability, protected veteran status, age, or any other characteristic protected by law.


If you require a reasonable accommodation to apply for a position with Sotera through its online applicant system, please contact Sotera’s recruiting team at  


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