Senior ISSM: Information Security Manager (Top Secret)

CACI; Reston (VA); On-site; USD 87,000 - 182,000; Full time

Job summary

CAC I is seeking an Information Systems Security Manager (ISSM) in Reston, VA to lead system accreditation through development, engineering, integration and testing of the Financial System. The role requires Top Secret clearance and on-site work.

You will collaborate with government Cyber Security teams and enterprise IT staff to secure systems across development and operations. The position emphasizes ATO support, risk management, vulnerability remediation and incident response, with a focus on

Qualifications

• Active Top Secret clearance required or ability to obtain CI polygraph after onboarding.
• Bachelor's degree required; advanced degrees preferred.
• Must have professional information security certifications (CISM, CISSP, FITSP-M, GIAC family).
• 5+ years of experience securing computing environments, including cloud.
• Experience managing security accreditation life cycle under NIST RMF.
• Strong knowledge of information security policies and NIST 800-53.
• 5+ years creating SI/SAP and security-relevant documentation.

Responsibilities

• Support efforts to obtain Authority To Operate and for external IT audits.
• Research and stay current on vulnerabilities, data security and encryption trends.
• Design, develop or recommend secure system solutions aligned with requirements.
• Configure and validate secure systems and test for weaknesses.
• Produce security architecture documentation and risk assessments.
• Develop plans of action to remediate findings and ensure information assurance.
• Grant authorization to operate IT systems at acceptable risk levels.
• Monitor and test IT systems for vulnerabilities and indicators of compromise.
• Lead incident response and security awareness trainings.

Skills

Security policy knowledge

NIST RMF

Vulnerability management

Education

Bachelor's degree

MS or PhD in Information Technology, Cyber Security, Computer Science, Data Science or Software Engineering

Certifications: CISM, CISSP, FITSP-M, GCIH, GCIA, GICSP, GSLC

Tools

CISM

CISSP

FITSP-M

GCIH

GCIA

GICSP

GSLC

Job description

CAC I is seeking an Information Systems Security Manager (ISSM) in Reston, VA to lead system accreditation through development, engineering, integration and testing of the Financial System. The role requires Top Secret clearance and on-site work.

You will collaborate with government Cyber Security teams and enterprise IT staff to secure systems across development and operations. The position emphasizes ATO support, risk management, vulnerability remediation and incident response, with a focus on