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

gdit; Washington (District of Columbia); On-site; USD 164,000 - 207,000; Full time

Job summary

GDIT is seeking a Cybersecurity Systems Engineer/ISSE to lead A&A activities and RMF-compliant documentation on customer-site projects in Washington, DC. You will coordinate with ISSMs, engineers, and project managers to develop SSP/CONOPS and gather POA&Ms, providing clear status updates across levels.

The role requires 10+ years of experience, TS/SCI with polygraph eligibility, and DoD IASAE II certification.

Qualifications

• 10+ years of related experience.
• DoD 8570 IASAE II level certification or equivalent.
• TS/SCI clearance with ability to obtain polygraph.

Responsibilities

• Lead Accreditation and Authorization (A&A) reviews with ISSMs and Security Control Assessors.
• Document security control implementations and gather RMF/ ICD 503 artifacts for A&A.
• Write SSP/CONOPS and related A&A documents with stakeholders.
• Compile POA&M responses and ensure required evidence is available.
• Coordinate with contractor and customer personnel to obtain A&A content and navigate approval processes.
• Support audit liaison and RMF compliance activities and provide actionable recommendations.

Skills

Information System Security

POA&M

Risk Assessments

Job description

Type of Requisition:

Regular

Clearance Level Must Currently Possess:

Top Secret SCI + Polygraph

Clearance Level Must Be Able to Obtain:

Top Secret SCI + Polygraph

Public Trust/Other Required:

None

Job Family:

Cyber and IT Risk Management

Job Qualifications:

Skills:

Information System Security, Plan of Action and Milestones (POA&M), Risk Assessments

Certifications:

None

Experience:

10 + years of related experience

US Citizenship Required:

Yes

Job Description:

CYBERSECURITY ANALYST SME

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.

MEANINGFUL WORK AND PERSONAL 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: TS/SCI clearance and ability to obtain and maintain a 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.

#VA_2026Alumni

#MD_2026Alumni

#GDITEnhanced2026

#GDITCareers

#JET

The likely salary range for this position is $164,382 - $207,000. This is not, however, a guarantee of compensation or salary. Rather, salary will be set based on experience, geographic location and possibly contractual requirements and could fall outside of this range.

Scheduled Weekly Hours:

40

Travel Required:

None

Telecommuting Options:

Onsite

Work Location:

USA DC Washington

Additional Work Locations:

Total Rewards at GDIT:

Our benefits package for all US-based employees includes a variety of medical plan options, some with Health Savings Accounts, dental plan options, a vision plan, and a 401(k) plan offering the ability to contribute both pre and post-tax dollars up to the IRS annual limits and receive a company match. To encourage work/life balance, GDIT offers employees full flex work weeks where possible and a variety of paid time off plans, including vacation, sick and personal time, holidays, paid parental, military, bereavement and jury duty leave. To ensure our employees are able to protect their income, other offerings such as short and long-term disability benefits, life, accidental death and dismemberment, personal accident, critical illness and business travel and accident insurance are provided or available. We regularly review our Total Rewards package to ensure our offerings are competitive and reflect what our employees have told us they value most.

Our Identity Verification Process:

As part of the hiring process, we will ask you to complete an identity verification process that leverages advanced biometrics and artificial intelligence to ensure authenticity and protect against identity fraud. You are expected to be on camera during virtual interviews. We reserve the right to take your picture to verify your identity and prevent fraud. By proceeding, you authorize the collection, processing, and use of your biometric data for identity verification and security purposes.

About Our Work:

We are GDIT. A global technology and professional services company that delivers technology solutions and mission services to every major agency across the U.S. government, defense and intelligence community. Our 26,000 experts extract the power of technology to create immediate value and deliver solutions at the edge of innovation. We operate across 50+ countries worldwide, offering leading mission-ready capabilities in AI, cloud, cyber and software development. Join our Talent Community to stay up to date on our career opportunities and events at gdit.com/tc.

Equal Opportunity Employer / Individuals with Disabilities / Protected Veterans