Information System Security Manager

Amentum; Sumter (SC); On-site; USD 100,000 - 110,000; Full time

Job summary

Amentum is seeking an Information Systems Security Manager (ISSM) to oversee system-level cybersecurity governance, RMF compliance, and continuous monitoring for designated contractor-managed enclaves. The role reports to government AOs and ensures timely ATO actions across multiple systems.

Qualified candidates hold TS/SCI eligibility, DoD 8140 IAM II/III, and 3–5 years of RMF experience. You will coordinate SSPs, risk assessments, and POA&Ms while guiding ISSOs and maintaining security posture.

Qualifications

• BS in Information Technology, Cybersecurity, Data Science, Information Systems, Computer Science, or equivalent from ABET-accredited/CAE-designated institution.
• Active TS/SCI clearance is required with US citizenship.
• DoD 8140 / DoDI 8570.01-M IAM Level II/III certification aligned to ISSM responsibilities.
• 3–5 years RMF package development, continuous monitoring, ISSM/lead ISSO.
• Experience with eMASS and Xacta for ATO management.

Responsibilities

• Serve as ISSM for multiple contractor-managed systems and oversee RMF lifecycle.
• Develop, maintain SSPs, risk assessments, and continuous monitoring activities.
• Interface with Government AOs and SCAs to present risk and manage ATO packages.
• Oversee vulnerability management, incident reporting, access control governance, and CM.
• Mentor ISSOs and provide continuity support for tactical enclave cybersecurity.
• Report conditions affecting authorization status to Government leadership.
• Initiate exceptions or waivers with proper documentation and AO coordination.

Skills

Communication

Leadership

RMF Knowledge

Briefing Skills

Governance

Education

ABET-accredited program

Master's degree

Tools

eMASS

Xacta

ACAS/NESSUS

STIGs/SCAP

POA&M

Job description

The ISSM provides dedicated strategic cybersecurity leadership and oversight for designated classified information system enclaves supporting the 25th Attack Group (25 ATKW). Unlike a hybrid or tactical operations role, this position focuses exclusively on system-level cybersecurity governance, Risk Management Framework (RMF) compliance, and continuous monitoring to achieve and maintain Authorizations to Operate (ATO). The ISSM serves as the primary cybersecurity technical advisor to the Government Authorizing Official (AO), Program Manager (PM), and Information System Owner (ISO).

Essential Responsibilities

• Serve as the formally appointed Information Systems Security Manager (ISSM) for up to four contractor-managed Information Systems (including RPA Low, ACN, Audio MLS, and RPA High), overseeing the full lifecycle of cybersecurity compliance and system accreditation in accordance with DoDI 8510.01, AFI 17-101 (RMF), and AFMAN 17-1301 (COMPUSEC).
• Develop, maintain, and oversee authorization documentation, System Security Plans (SSPs), risk assessments, and continuous monitoring activities using both eMASS and Xacta workflow platforms.
• Act as the primary interface with Government Authorizing Officials (AOs) and Security Control Assessors (SCAs) to present risk assessments, initiate ATO packages, manage Plan of Action and Milestones (POA&Ms), and secure timely renewals.
• Maintain rigorous oversight of vulnerability management, incident reporting, access control governance, and configuration management functions across assigned enclaves.
• Provide oversight and guidance to subordinate cybersecurity personnel (ISSOs) to ensure security control implementation and mitigation efforts align with established baselines and mission requirements.
• Provide contingency continuity support for tactical enclave cybersecurity (ISSO) activities during periods of workforce shortfalls or as critical mission needs dictate.
• Report conditions that materially affect system authorization status or cybersecurity posture directly to the Government, translating technical risk into actionable mission risk.
• Initiate exceptions, deviations, or waivers to cybersecurity requirements when operational impacts dictate, ensuring complete documentation and coordination with the AO.
• Ensure all assigned personnel and systems remain compliant with applicable DoW/DoD 8140 cybersecurity workforce requirements.

Minimum Qualifications

• A BS degree in Information Technology, Cybersecurity, Data Science, Information Systems, Computer Science, or equivalently relative discipline, from an ABET accredited or CAE designated institution.
• Must have an active Top-Secret clearance with Sensitive Compartmented Information (TS/SCI) eligibility. US Citizenship is required.
• Active DoD 8140 / DoDI 8570.01-M IAM Level II or III Certification matched to ISSM responsibilities prior to hiring.
• Minimum 3-5 years of dedicated experience in RMF package development, continuous monitoring, and acting as an ISSM or lead ISSO.
• Demonstrated proficiency in navigating and managing ATO packages within both eMASS and Xacta. Experience with STIGs, SCAP, vulnerability scanning, and ACAS/NESSUS.
• Knowledge of cybersecurity laws, regulations, policies, governance, and technical safeguards governing the use, processing, storage, and transmission of classified information.
• Exceptional communication skills, with the ability to confidently brief senior government leadership (AOs, SCAs, PMs) on cyber risk posture.
• Must possess and maintain a valid state-issued driver’s license.

Preferred Qualifications

• Master’s degree in a Cybersecurity or related field.
• Experience with DODM 5205.07 Risk Management Framework, and familiarity with RPA SOC/C4 ISR mission system.

Work Environment, Physical Demands, and Mental Demands

Typical office environment with no unusual hazards, occasional lifting of 20 pounds, kneeling, standing, and walking, routinely sitting and constant use of speech/hearing abilities for communication, constant mental alertness, and must be able to work under deadlines.

Compensation Details

$100,000 - $110,000

The compensation range or hourly rate listed for this position is provided as a good-faith estimate of what the company intends to offer for this role at the time this posting was issued. Actual compensation may vary based on factors such as job responsibilities, education, experience, skills, internal equity, market data, applicable collective bargaining agreements, and relevant laws.

Benefits Overview

Our health and welfare benefits are designed to support you and your priorities. Offerings include:

• Health, dental, and vision insurance
• Paid time off and holidays
• Retirement benefits (including 401(k) matching)
• Educational reimbursement
• Parental leave
• Employee stock purchase plan
• Tax-saving options
• Disability and life insurance
• Pet insurance

Note: Benefits may vary based on employment type, location, and applicable agreements. Positions governed by a Collective Bargaining Agreement (CBA), the McNamara-O'Hara Service Contract Act (SCA), or other employment contracts may include different provisions/benefits.

Amentum is proud to be an Equal Opportunity Employer. Our hiring practices provide equal opportunity for employment without regard to race, sex, sexual orientation, pregnancy (including pregnancy, childbirth, breastfeeding, or medical conditions related to pregnancy, childbirth, or breastfeeding), age, ancestry, United States military or veteran status, color, religion, creed, marital or domestic partner status, medical condition, genetic information, national origin, citizenship status, low-income status, or mental or physical disability so long as the essential functions of the job can be performed with or without reasonable accommodation, or any other protected category under federal, state, or local law. Learn more about your rights under Federal laws and supplemental language at Labor Laws Posters.