Senior ISSO (Top Secret) – ATO/RMF Expert

Amentum; Washington (District of Columbia); On-site; USD 150,000 - 165,000; Full time

Benefits offered by this job

Health insurance

401(k) matching

Educational reimbursement

Parental leave

ESPP

Job summary

Amentum is seeking a Top-Secret cleared Information System Security Officer (ISSO) to join our Washington, DC team. You will guide security controls, ensure ATO readiness, and collaborate with the CISO/ISSM to protect mission-critical assets.

Responsibilities include developing POAMs, performing network inspections, and maintaining documentation for system security plans, with a focus on FISMA, NIST, and DCID 6/3 compliance.

Qualifications

• 7+ years of experience in information security roles
• Knowledge of security standards and regulations (ISO 27001, NIST, HIPAA)
• Experience with RMF, ICD 503, NIST SP 800-53 or DCID 6/3

Responsibilities

• Advise SO, BPO, and CISO/ISSM on information system security
• Implement and maintain security controls
• Develop POAM and ATO documentation
• Perform network self-inspections and ensure system security compliance

Skills

ISSO

RMF

NIST SP 800-53

FISMA

Risk assessment

Vulnerability mgmt

Education

Bachelor's degree in IS/CS/Engineering

Tools

Splunk

JIRA

Confluence

Nessus

SAST

Job description

Amentum is seeking a Top-Secret cleared Information System Security Officer (ISSO) to join our Washington, DC team. You will guide security controls, ensure ATO readiness, and collaborate with the CISO/ISSM to protect mission-critical assets.

Responsibilities include developing POAMs, performing network inspections, and maintaining documentation for system security plans, with a focus on FISMA, NIST, and DCID 6/3 compliance.