System Security Engineer

About DMI

DMI is a leading provider of digital services and technology solutions, headquartered in Tysons Corner, VA. With a focus on end-to-end managed IT services, including managed mobility, cloud, cybersecurity, network operations, and application development, DMI supports public sector agencies and commercial enterprises around the globe. Recognized as a Top Workplace, DMI is committed to delivering secure, efficient, and cost-effective solutions that drive measurable results. Learn more at www.dminc.com

About the Opportunity

DMI, LLC is seeking a System Security Engineer to join us.

 

Duties and Responsibilities:

• Security Assessment & Authorization (SA&A)
  • Lead the preparation, submission, and lifecycle maintenance of full Certification & Accreditation (C&A) packages for ISB systems (e.g., Azure, Consolidated Statistical Platform, OCIO ISB Infrastructure Services).
  • Develop and maintain documentation in Archer.
  • Coordinate with CSPO to ensure federal SA&A elements are accurate, complete, and compliant.
• Enhanced Security Control Evaluation Audits (ESCA)
  • Provide complete and accurate security control evidence for CSPO audits.
  • Resolve findings and update documentation (BSI, BCP, SSP, ATT, PIA, ATO) in Archer based on CSPO review and feedback.
• Security Evaluation & Approvals
  • Verify and validate security control implementations across ISB managed systems.
  • Track vulnerabilities, remediation plans, and mitigation activities.
  • Review and approve system configuration changes via ServiceNow or similar change control platforms.
  • Ensure alignment with NIST 800-53a assessment procedures.
• Risk Management Framework (RMF)
  • Apply ITIL processes to document security-related policies and procedures.
  • Maintain accountability, records retention, and documentation consistent with RMF requirements.
• Physical Security – Data Center Access
  • Manage and maintain Access Control Lists (ACLs) for data center smart card physical security.
• Federal Regulation & Compliance
  • Ensure compliance with:
    • Federal IT security laws
    • OMB circulars
    • Presidential Decision Directives (PDDs)
    • FISMA requirements
    • Other federal regulations and guidance
    • Monitor CSPO alerts and implement required updates to ISB managed systems

Qualifications

Years of Experience and Certifications:

• 3+ years of experience.
• Proficiencies in Microsoft Word, Excel, and Adobe PDF tools.
• Certified Information Systems Security Professional (CISSP) is required.

Required and Desired Skills: 

• Advanced Information Security experience, including deep knowledge of NIST and/or ISO frameworks.
• Expertise with NIST 800-53, including control interpretation, assessment, and documentation (this constitutes ~75% of the role).
• Demonstrated experience writing and maintaining Security Control responses and compliance documentation.
• Experience with ServiceNow or similar change control systems (can be learned on the job).
• Experience with Archer governance, risk, and compliance (GRC) tools (can be learned on the job).

 

Clearance Requirements: Successful completion of a Public Trust background investigation and/or a Public Trust clearance.

 

Min Citizenship Status Required: Must be a U.S. Citizen

 

Physical Requirements: No physical requirement is needed for this position.

Location: Remote, US

Working at DMI

DMI is a diverse, prosperous, and rewarding place to work. Our culture is shaped by five core values that guide how we work, grow, and succeed together:

 

• Do What’s Right – We lead with honesty and integrity.
• Own the Outcome – We take responsibility and deliver.
• Deliver for Our Customers – We are relentless about delivering value.
• Think Bold, Act Smart – We innovate with purpose.
• Win Together – We collaborate and celebrate our success.

These values aren’t just ideals—they show up in how we support every part of your well-being:

 

• Convenience/Concierge – Virtual health visits, commuter perks, pet insurance, and entertainment discounts that make life easier.
• Development<