Information Systems Security Engineer

MANTECH • Crane, IN

1d • Onsite

About The Position

Shape the future of defense with MANTECH! Join a team dedicated to safeguarding our nation through advanced tech and innovative solutions. Since 1968, we’ve been a trusted partner to the Department of Defense, delivering cutting-edge projects that make a real impact. Dive into exciting opportunities in Cybersecurity, IT, Data Analytics and more. Propel your career forward and be part of something extraordinary. Your journey starts now—protect and innovate with MANTECH!

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

Requirements

• 5+ years of direct experience in cybersecurity engineering, systems engineering, or network administration
• Bachelor's degree in Computer Science, Information Assurance, System Engineering, or a related technical discipline. 6+ years of additional experience may substitute for the degree requirements
• Must possess a CompTIA Security+ certification
• U.S. Citizenship required and an active or current Secret clearance or ability to obtain an Interim Secret prior to starting.

Nice To Haves

• Master’s degree in Computer Science, Computer Engineering, or related technical field
• Active DoD 8570.01-M / DoD 8140 IAT Level III baseline certification (e.g., CISSP, CASP+ CE, or CISA)
• Previous experience working in a DoD environment

Responsibilities

• Leads the development, update, and submission of the RMF packages inside government repositories (e.g., eMASS).
• Conducts security control assessments, draft Plans of Action and Milestones (POA&Ms), and maintains system continuous monitoring strategies.
• Performs automated and manual vulnerability assessments using tools like ACAS (Nessus) and SCAP.
• Translates findings into action by applying Defense Information Systems Agency (DISA) Security Technical Implementation Guides (STIGs) and resolving compliance gaps.
• Serves as the primary bridge between the software development/systems engineering team and the Information System Security Manager (ISSM).
• Participates in engineering change boards to ensure modifications do not compromise system posture.
• Assists in analyzing security logs, detecting anomalies, and providing system-level technical support during incident response or forensic investigations.
• Applies system security engineering principles to implement secure designs, secure configurations, and boundary defenses (firewalls, IDS/IPS, access controls).
• Ensures standard security tools (e.g., HBSS/ESS, ACAS, SIEM) are properly integrated

What This Job Offers

• Job Type: Full-time
• Career Level: Senior