Senior ISSE: RMF, Zero Trust & ATO Lead

MANTECH; Crane (IN); On-site; USD 120,000 - 150,000; Full time

Job summary

MANTECH seeks a Senior Information Systems Security Engineer to join our on-site team in Crane, IN. The role requires a U.S. Citizenship and an active Secret clearance with the ability to obtain Interim Secret as needed.

The selected candidate will integrate security into system lifecycles, harden interfaces and cloud environments, and prepare RMF documentation (SSPs, SAPs, SARs, POA&Ms). You will lead security reviews and advise government stakeholders across programs.

Qualifications

• Bachelor's degree or equivalent experience in a technical discipline as described.
• 10+ years of progressive experience in system engineering, information assurance, or cybersecurity.
• SecurityX (formerly CASP+) or CISSP certification required.

Responsibilities

• Integrate security functional requirements into system acquisition, engineering, and development phases.
• Harden application interfaces, data repositories, and cloud environments.
• Prepare, review, and maintain RMF security documentation (SSPs, SAPs, SARs, POA&Ms).
• Support certification activities to secure IATT and ATO.
• Act as the primary technical security advisor to government stakeholders, program managers, and system engineering teams.
• Lead security walkthroughs and reviews with government/industry groups.
• Conduct threat modeling, vulnerability assessments, and analyze security logs.
• Design end-to-end security solutions for networks, databases, and enterprise systems.
• Incorporate Zero Trust, boundary protection, firewalls, and cryptographic controls.

Skills

Security engineering

Threat modeling

RMF

Zero Trust

Vulnerability assessment

Security incident response

Security logs analysis

Network security

Cryptography

Education

Bachelor's degree in Information Security

Bachelor's degree in Systems Engineering

High School Diploma with 4+ years experience

Job description

MANTECH seeks a Senior Information Systems Security Engineer to join our on-site team in Crane, IN. The role requires a U.S. Citizenship and an active Secret clearance with the ability to obtain Interim Secret as needed.

The selected candidate will integrate security into system lifecycles, harden interfaces and cloud environments, and prepare RMF documentation (SSPs, SAPs, SARs, POA&Ms). You will lead security reviews and advise government stakeholders across programs.