Information System Security Engineer

General information

Requisition # R63820 Locations USA-DC-Washington Posting Date 10/20/2025 Security Clearance Required Top Secret Remote Type Onsite Time Type Full time

Description & Requirements

Transform the future of federal services with MANTECH! Join a vibrant, energetic team committed to enhancing national security and public services through innovative tech. Since 1968, we’ve partnered with Federal Civilian sectors to deliver impactful solutions. Engage in exciting projects in Digital Transformation, Cybersecurity, IT, Data Analytics and more. Ignite your career and drive change. Your journey starts now—innovate and excel with MANTECH!

MANTECH seeks a motivated, career and customer-oriented Information System Security Engineer (ISSE) to join our team in Washington, D.C..

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 requirements

• Design security architectures for use within the IS and Network Environment.  Design and develop cybersecurity-enabled products for use within an IS and Network Environment

• Integrate and/or implement security with Cross Domain Solutions (CDS) for use within an IS and Network Environment

• Develop 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 Environment

• Design, 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 Environment

• Develop 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 needed

• Ensure that network system(s) designs support the incorporation of FBI directed cybersecurity vulnerability solutions

Minimum 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 a