Cybersecurity Systems Engineer/Information Systems Security Engineer (ISSE) - TS/SCI with Polygraph

Public Trust: None

Requisition Type: Regular

Your Impact

Own your opportunity to serve as a critical component of our nation’s safety and security. Make an impact by using your expertise to protect our country from threats.

Job Description

*Position is currently located in Elkridge, MD and will relocate to another site in the National Capital Region in Summer 2026*

Transform technology into opportunity as a Cybersecurity Systems Engineer/Information Systems Security Engineer (ISSE)

with GDIT. A career in enterprise IT means connecting and enhancing the systems that matter most. At GDIT you’ll be at the forefront of innovation and play a meaningful part in improving how agencies operate. At GDIT, people are our differentiator. As a Cybersecurity Systems Engineer/Information Systems Security Engineer (ISSE) you will help ensure today is safe and tomorrow is smarter.

HOW A CYBERSECURITY SYSTEMS ENGINEER/INFORMATION SYSTEMS A SECURITY ENGINEER (ISSE) WILL MAKE AN IMPACT:

• Lead Accreditation and Authorization (A&A) reviews by Group level ISSMs and Security Controls Assessors (SCA)

• Documents the various security control implementations as well as gather the artifacts that support the Risk Management Framework (RMF) and ICD 503 Security Accreditation for the various Assessment and Authorization (A&A) efforts

• Document and obtain a general understanding of the architecture being developed or that was developed for each project in order to write the Systems Security Plans (SSP) / CONOPS

• Gather the information by working with various systems owners, project managers, and engineering team members in order to write various additional A&A related documents such as Contingency Plan (CP), General User Guide (GUG), Privileged User Guide (PUG), Standard Operating Procedures (SOP' s), etc.

• Document the Plans of Actions and Milestones (POA&Ms) implementation responses or mitigations, as well as provide all required artifacts (i.e. evidence gathering from the system owners, PMs, and engineering teams)

• Coordinating with various contractor and customer personnel to obtain the A&A content, as well as working with various customer security organizations to navigate the customer's A&A process in order to achieve Authority to Develop (A TD), Interim Authority to Test (IA TT), and Authority to Operate (ATO) for each of the primary and secondary assigned systems

• Monitor each of the various A&A projects within the customer's A&A process and be able to fluently discuss the status at all levels

• Support audit liaison activities, and compliance oversight activities to strengthen the security program and promote compliance with the Risk Management Framework (RMF)

• Perform technical content reviews and edits as part of the document updates as part of the Annual ISCM and OA Strategy Plan Update

• Conduct a technical review and update of the control volatility section of the plan considering emerging threats, changes to the agency security posture, the latest IC guidance, agency policy, federal laws, standards, and guidance, et., and based on information profile (e.g., High Value Asset (HVA), TS (SCI), Secret, etc.)

• Provide audit liaison support for internal and external audits and data calls for external reporting. Document and provide concise and actionable recommendations and process improvements reports

WHAT YOU’LL NEED TO SUCCEED:

• Required Education and Experience: Technical Training, Certification(s) or Degree + 10 years

• Certifications: DoD Manual 8570.01-M at the Information Assurance System Architects & Engineer (IASAE) Level II role

• Security Clearance Level: Active TS/SCI with Polygraph

• Location: On Customer Site

GDIT IS YOUR PLACE
At GDIT, the mission is our purpose, and our people are at the center of everything we do.
● Growth: AI-powered career tool that identifies career steps and learning opportunities
● Support: An internal mobility team focused on helping you achieve your career goals
● Rewards: Comprehensive benefits and wellness packages, 401K with company match, and competitive pay and paid time off
● Community: Award-winning culture of innovation and a military-friendly workplace

OWN YOUR OPPORTUNITY
Explore a career in cyber at GDIT and you’ll find endless opportunities to grow alongside colleagues who share your focus on defending and protecting what matters.

#GDITCareers

#WeAreGDIT

#MD_2026Alumni

#VA_2026Alumni

#JET

Work Requirements

Years of Experience

10 + years of related experience

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

Certification

Travel Required

None

Citizenship

U.S. Citizenship Required