Information System Security Engineer

General information Requisition #

R69749

Locations USA-VA-Quantico, USA-AL-Huntsville Posting Date 08/03/2026 Security Clearance Required

TS/SCI

Remote Type Onsite Time Type Full time Description & Requirements Unlock the secrets of intelligence with MANTECH! Join a dynamic team at the forefront of national security, providing advanced solutions to government intelligence agencies. Since 1968, we’ve been solving the toughest challenges with groundbreaking tech. Explore thrilling projects in Digital Transformation, Cybersecurity, IT, Data Analytics and Software Development. Elevate your career and make a difference. Your adventure begins now—unleash your potential with MANTECH!MANTECH seeks a motivated, career and customer-oriented Information System Security Engineer (ISSE) to join our team in Washington, D.C., Chantilly, VA, Quantico, VA, or Huntsville, AL. Responsibilities include, but are not limited to:Identify information protection needs for an IS and Network Environment. Define IS and Network Environment security requirements in accordance with applicable cybersecurity requirementsDesign security architectures for use within the IS and Network Environment. Design and develop cybersecurity-enabled products for use within an IS and Network EnvironmentIntegrate and/or implement security with Cross Domain Solutions (CDS) for use within an IS and Network EnvironmentDevelop and implement security designs for new or existing network system(s). Ensure that the design of hardware, operating systems, and software applications adequately address cybersecurity requirements for the IS and Network EnvironmentDesign, develop, and implement network security measures that provide confidentiality, integrity, availability, authentication, and non-repudiation. Design, develop, and implement specific cybersecurity countermeasures for the IS and Network EnvironmentDevelop interface specifications for the IS and Network Environment. Develop approaches to mitigate IS and Network Environment vulnerabilities and recommend changes to network or network system components as neededEnsure that network system(s) designs support the incorporation of FBI directed cybersecurity vulnerability solutionsMinimum Qualifications:Must meet one of the following levels of experience: A high school diploma/GED and 14 years’ experience, an Associate’s degree and 7 years’ experience, a Bachelors degree and five years’ experience, or a Master’s and 3 years’ experience.Hold at least one of the following certifications: Certified Information Systems Security Professional (CISSP) (or Associate), CompTIA Advanced Security Practitioner (CASP) CE, Certified Secure Software Lifecycle Professional (CSSLP), CISSP- Information System Security Engineering Professional (ISSEP), or CISSP- Information System Security Architecture Professional (ISSAP). Familiarity with the use and operation of security tools including: Tenable Nessus and/or Security Center, IBM Guardium, HP WeblInspect, Network Mapper (NMAP), and/or similar applications.Working knowledge of the National Institute of Standards and Technology (NIST) Risk Management Framework (RMF) and ATO processes.Preferred Qualifications:Degree in Computer Science, Cybersecurity, or other cyber discipline.Security Clearance Requirements: Must have a current/active Top Secret security clearance with eligibility to obtain SCI prior to starting this position.Selected candidate must be willing to undergo a Polygraph.Physical Requirements:Must be able to remain in a stationary position 50%Needs to occasionally move about inside the office to access file cabinets, office machinery, etc.Constantly operates a computer and other office productivity machinery, such as a calculator, copy machine and computer printerOften positions self to maintain computers in the lab, including under the desks and in the server closetFrequently communicates with co-workers, management and customers, which may involve delivering presentations. Must be able to exchange accurate information in these situationsMANTECH 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 View email address on click.appcast.io and provide your name and contact information.