Information Systems Security Engineer

General information

Requisition # R61819 Locations USA-VA-Norfolk Posting Date 07/17/2025 Security Clearance Required Secret Remote Type Onsite Time Type Full time

Description & Requirements

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 in Norfolk, VA.  This is an onsite position. 

Responsibilities include, but are not limited to:

• Perform, support, or review security assessments to identify vulnerabilities or non-compliance and recommend activities to mitigate or eliminate identified threats

• Validate, and verify complex system-wide security requirements based on analysis of user, policy, regulatory, and resource demands

• Design, develop, and deploy security system architectures to meet evolving customer needs

• Design, develop, implement and/or integrate security components including for networking, computing, and multi-enclave environments

• Assist in the development and implementation of security functionality in varied products and services across the enterprise environment

• Review, provide feedback, and help update and maintain project and program documentation which contain IS stipulations, such as system security plans (SSP), certification and accreditation (C&A) packages, and other system design artifacts

• Enforce compliance with security authorization activities in accordance with Government standards and the RMF

Minimum Qualifications:

• Bachelor’s degree in Computer Science or other related technical field and five (5) years relevant experience or High School Diploma and eleven (11) years of relevant experience

• Experience identifying and analyzing systems requirements

• Experience developing and maintaining system applications and security

• Experience providing user support and guidance

• Experience recommending and implementing security upgrades, security patches, and new applications vulnerabilities for installed equipment

• Experience ensuring proper documentation, coordination, and maintenance of multiple systems

• Experience of DIACAP and RMF are required as well as ACAS experience and DISA ACAS certification

• Experience with eMass

• CSWF requirements with current baseline and Computing Environment/Operating System (CE/OS) certifications (Preferably VMware, Linux and/or Microsoft Windows 2022)

Preferred Qualifications:

• 3 years of relevant work experience as an ISSE within a U.S. Government environment, DoD strongly preferred

• Active SEC+ CE certification.

• Master’s degree in Computer Science or related technical field

• Active TS/SCI

Clearance Requirements:

• Active Secret security clearance with the ability to obtain a TS/SCI

Physical Requirements:

• Must be able to remain in a stationary position 50%

• Constantly operates a computer and other office productivity machinery, such as a calculator, copy machine and computer printer.

• The person in this position needs to occasionally move about inside the office to access file cabinets, office machinery, etc.

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.