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Cross Domain Systems Engineer III

Job in St. Louis, Saint Louis, St. Louis city, Missouri, 63105, USA
Listing for: RISA
Full Time position
Listed on 2026-08-30
Job specializations:
  • IT/Tech
    Cybersecurity, Systems Engineer
Salary/Wage Range or Industry Benchmark: 101000 - 111000 USD Yearly USD 101000.00 111000.00 YEAR
Job Description & How to Apply Below
Location: St. Louis

Cross Domain Solutions Engineer (CDS) Cybersecurity Engineering Specialist III
- Enterprise Cross-Domain System

Location:

St. Louis, MO - on site Time Type:
Full time, Exempt Clearance Required to Start:
Active TS/SCI (U.S. citizenship required) Additional Requirement:
Must be able to obtain and maintain a Government polygraph (post-hire requirement) Travel:
Less than 10%, local Salary Range: $101,000 – $111,000 Moving data between security domains, safely, at enterprise scale.

RISA is hiring a Cross Domain Engineer to provision customer dataflow in an Enterprise Cross-Domain System for an Intelligence Community customer. CDS is a small field and the work is genuinely hard: you own the design conversation with stakeholders, the implementation, and the health of the system once it is running. You will talk to the owner here, not a recruiting queue.

What

You Will Do
  • Collect requirements from stakeholders and determine the best implementation approach.
  • Schedule and run Technical Exchange Meetings to whiteboard design and implementation detail.
  • Coordinate implementation approach and timeline with technical and project management staff.
  • Identify and remediate implementation conflicts across CDS technologies enterprise-wide.
  • Respond to and resolve service outages, technical queries, and system issues.
  • Run system checks across processes, services, network, and storage to assess overall health.
  • Write the technical documentation and deliver the briefings that go with the work.
What You'll Bring
  • U.S. citizenship and an active TS/SCI.
  • Ability to successfully obtain and maintain a Government polygraph after hire.
  • Education and experience, per the contract labor category criteria:
    Bachelor's degree in a field applicable to the position plus 6 years of relevant experience. Equivalents accepted
    - Master's plus 4, Associate's plus 8, or High School diploma/GED plus 10.
  • DoD IAT Level II certification.
  • Linux, with a working understanding of operating system security practices.
  • TCP/IP networking and network security concepts.
Nice to Have
  • Hands-on with Cross Domain Solutions and operational support of CDS technologies on the NCDSMO-approved products list.
About RISA

Rolston Information Systems Assurance (RISA) is a Service-Disabled Veteran-Owned Small Business that has supported federal defense and intelligence cybersecurity missions for more than seventeen years. We are small on purpose: direct access to leadership, a real say in how the work gets done, and none of the layers that slow large primes down.

Benefits
  • Medical, dental, and vision insurance
  • 401(k) and Roth
  • Paid Time Off
  • 11 paid Federal Holidays

RISA is an Equal Opportunity Employer.

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