**MANTECH** seeks a motivated, career and customer-oriented **Senior** **Information Systems Security Engineer** to join our team working in **Crane, IN.** This is an **onsite** position.

+ Systematically integrates security functional requirements into system acquisition, engineering, and development phases.

+ Harden application interfaces, data repositories, and cloud environments using systems engineering methodologies.

+ Prepare, review, and maintain system security documentation under the Risk Management Framework (RMF), including SSPs, SAPs, SARs, and POA&Ms.

+ Support system certification activities to secure and maintain an Interim Authority to Test (IATT) and Authority to Operate (ATO).

+ Acts as the primary technical security advisor/SME to Government stakeholders, program managers, and system engineering teams.

+ Lead technical walkthroughs, security reviews, and participates in intelligence-community or industry-based technical working groups.

+ Conduct threat modeling, vulnerability assessments, and analyzes security logs to proactively harden defenses against adversaries.

+ Provide technical expertise to contain and mitigate real or potential system security incidents. Design and architect robust end-to-end security solutions for networks, databases, and enterprise systems.

+ Incorporate Zero Trust principles, boundary protection, firewalls, and cryptographic controls to safeguard critical warfighting infrastructure.

+ Bachelors degree in Information Security, Systems Engineering or a related technical discipline or, a High School Diploma and 4+ additional years of experience as described above in lieu of degree

+ 10+ years of progressive experience in system engineering, information assurance, or cybersecurity

+ Master’s degree in Computer Science, Computer Engineering, or related technical field

+ U.S. Citizenship required and a current or active Secret clearance or ability to obtain an Interim Secret clearance prior to starting.

+ The person in this position must be able to remain in a stationary position 50% of the time.

+ Occasionally move about inside the office to access file cabinets, office machinery, or to communicate with co-workers, management, and customers, via email, phone, and or virtual communication, which may involve delivering presentations.

MANTECH International Corporation considers all qualified applicants for employment without regard to disability or veteran status or any other status protected under any federal, state, or local law or regulation.

If you need a reasonable accommodation to apply for a position with MANTECH, please email us at careers@mantech.com and provide your name and contact information.