A&A Security Analyst (TS/SCI)

ManTech; Herndon (VA); On-site; USD 90,000 - 130,000; Full time

Job summary

MANTECH in Herndon, VA seeks a motivated A&A Specialist to join our security team. You will perform comprehensive assessments of systems and networks, lead A&A activities, and develop Security Plans and BOE/POA&M to support ST&E milestones.

The role requires 3+ years in information security programs, experience with RMF, ICD-503, CNSS guidelines, and a current TS/SCI with polygraph. Strong analytical and communication skills are essential.

Qualifications

• 3+ years of experience supporting an Information Systems Security program.
• 2+ years of vulnerability scanning experience with Nexpose or similar enterprise tools.
• Experience with ICD-503 controls, CNSS 1253 and RMF workflows.
• Understanding of system security design and enclave baselines.
• High level briefing and written communication of security findings.

Responsibilities

• Perform comprehensive assessments of systems and networks to identify deviations and vulnerabilities.
• Execute passive and active security assessments using enterprise scanning tools.
• Lead A&A activities to support accreditation under ICD-503, CNSS 1253 and NIST RMF.
• Develop, update, and maintain Security Plans, BOE, and POA&M for ST&E milestones.
• Perform ISSE tasks including security architecture reviews and verification testing.
• Validate baselines, recommend safeguards, and track corrective actions to closure.

Skills

Information security

RMF (NIST)

Policy & compliance

Security architecture

Stakeholder communication

Education

High School Diploma

Tools

Rapid7 Nexpose

Job description

MANTECH in Herndon, VA seeks a motivated A&A Specialist to join our security team. You will perform comprehensive assessments of systems and networks, lead A&A activities, and develop Security Plans and BOE/POA&M to support ST&E milestones.

The role requires 3+ years in information security programs, experience with RMF, ICD-503, CNSS guidelines, and a current TS/SCI with polygraph. Strong analytical and communication skills are essential.