Full-Time

Information System Security Officer

Isso

Posted on 10/31/2025

T-Rex Solutions

T-Rex Solutions

201-500 employees

Federal IT modernization and cybersecurity services

Compensation Overview

$120k - $160k/yr

+ 401(k) match

Ashburn, VA, USA

In Person

US Top Secret Clearance, US Citizenship, UK Top Secret Clearance, UK Citizenship Required

Category
IT & Security (1)
Requirements
  • Bachelor’s degree in related technical field such as Management Information Systems, Computer Science, Engineering, IT, Networking and Telecommunications.
  • A minimum of ten (10) plus years of related experience
  • Certifications, such as Network+ and Security +, CISSP and Security auditing are recommended.
  • Proficient in network and information system security principles and best practices.
  • In-depth knowledge of the Risk Management Framework (RMF), the NIST publications, and the DHS 4300A Policy Directive.
  • Experience with implementing the NIST 800-53 Security Controls in an Assessment & Authorization (A&A) process.
  • Experience reviewing Nessus scans, managing vulnerability mitigation and the information security process in an Enterprise environment.
  • Basic understanding of Enterprise networking concepts.
  • Ability to work well within a team environment and build reports with government and customer organizations.
  • US citizenship required
  • Ability to obtain and maintain a CBP public trust clearance
Responsibilities
  • The ISSO shall ben assigned to one or more existing FISMA Systems of Record as well as new IT Systems that are slated as new work products to develop an Authority to Operate (ATO) and follow-on Continuous Monitored system.
  • Develop and maintain all required FISMA system documentation.
  • Ensure systems adhere to Technical Reference Architecture (TRA) foundational and supplemental documents as additional security specifications, when applicable (available upon request).
  • Use approved security tools for continuous monitoring and management of security baselines.
  • Implement audit tools or processes for auditing and reporting services that support Continuous Diagnostics and Monitoring (CDM).
  • Provide engineering services and participation in Continuity of Operations Planning (COOP) and Disaster Recovery (DR) planning and exercises.
  • Develop and implement Configuration Management and Change Management plans when necessary.
  • Perform or participate in threat and vulnerability management for applicable FISMA systems.
  • Perform POA&M management.
Desired Qualifications
  • Experience directly supporting DHS, CBP or ICE Network Operations
  • Active CBP clearance, or DOD Secret clearance or higher

T-Rex Solutions provides IT modernization and cybersecurity services to U.S. federal agencies, focusing on agile transformation, cloud adoption, and data engineering. Its work spans designing, building, integrating, and operating large-scale government systems, including moving the 2020 Census to the cloud with AWS to achieve security, scalability, and reliability. Differentiators include a longstanding government contractor track record since 2003, a proven end-to-end lifecycle approach for federal IT modernization, and a deep specialization in cloud and infrastructure services for federal agencies. The company aims to help federal agencies modernize their IT landscape, improve security, and adopt cloud-based, scalable, and data-driven operations.

Company Size

201-500

Company Stage

N/A

Total Funding

N/A

Headquarters

Greenbelt, Maryland

Founded

1999

Simplify Jobs

Simplify's Take

What believers are saying

  • Cyber Cloud Technologies acquisition expands cloud and cybersecurity delivery capacity.
  • Nancy Norton and Leslie Hubbard-Darr strengthen national security capture credibility.
  • PIVOT-H and DoD portfolio hires deepen recurring agency relationships and recompete positioning.

What critics are saying

  • CIO-SP3 SB ended April 29, 2026, threatening pipeline continuity.
  • Prime contractors like Leidos and Booz Allen squeeze T-Rex on scale and pricing.
  • Cybersecurity failures on federal programs trigger stop-work, bad past performance, and lost awards.

What makes T-Rex Solutions unique

  • Bethesda-based since 1999, T-Rex specializes in federal modernization and cybersecurity.
  • Census online migration proved large-scale, secure cloud delivery for mission-critical agencies.
  • CIO-SP3 SB and SeaPort-NxG provide long-duration federal procurement access.

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Benefits

Unlimited Paid Time Off

Paid Parental Leave

Health Insurance

Vision Insurance

Dental Insurance

401(k) Retirement Plan

401(k) Company Match

Professional Development Budget

Tuition Reimbursement

Company News

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