Information System Security Engineer (ISSE)

Post Date

Jul 07, 2026

Location

O'fallon,
Illinois

ZIP/Postal Code

62225
US
Sep 08, 2026 Insight Global

Job Type

Perm

Category

Security Engineering

Req #

STL-66044765-178e-4747-81f0-039d7c68781e

Pay Rate

$65k - $82k (estimate)

Job Description

A client of Insight Global is seeking an Information System Security Engineer (ISSE) to support Department of Defense information systems by implementing cybersecurity controls, hardening operating environments, managing vulnerabilities, and engineering secure technical solutions. This position serves as a key member of the cybersecurity engineering team responsible for implementing security controls, supporting Risk Management Framework activities, and ensuring compliance with Department of Defense and National Institute of Standards and Technology cybersecurity standards.

We are a company committed to creating diverse and inclusive environments where people can bring their full, authentic selves to work every day. We are an equal opportunity/affirmative action employer that believes everyone matters. Qualified candidates will receive consideration for employment regardless of their race, color, ethnicity, religion, sex (including pregnancy), sexual orientation, gender identity and expression, marital status, national origin, ancestry, genetic factors, age, disability, protected veteran status, military or uniformed service member status, or any other status or characteristic protected by applicable laws, regulations, and ordinances. If you need assistance and/or a reasonable accommodation due to a disability during the application or recruiting process, please send a request to HR@insightglobal.com.To learn more about how we collect, keep, and process your private information, please review Insight Global's Workforce Privacy Policy: https://insightglobal.com/workforce-privacy-policy/.

Required Skills & Experience

Active Secret or Top Secret Clearance
3–5+ years of experience in cybersecurity, security engineering, or system hardening
Experience conducting vulnerability assessments and remediation
Hands-on experience with STIGs (Security Technical Implementation Guides)
Experience using vulnerability management tools such as Tenable Security Center, Nessus, or similar
Knowledge of secure system configurations and compliance requirements
Strong troubleshooting, communication, and analytical skills
Bachelor's degree in Cybersecurity, Computer Science, IT, or related field (or equivalent experience)

Nice to Have Skills & Experience

Experience with CyberArk or other Privileged Access Management (PAM) tools
Experience with cloud security assessment tools such as Tenable Cloud Security
Experience supporting DoD cloud environments (AWS, Azure, etc.)
Holds a cybersecurity certification such as CEH or another DoD 8140-approved certification
Experience supporting mission-critical DoD systems and applications

Benefit packages for this role will start on the 1st day of employment and include medical, dental, and vision insurance, as well as HSA, FSA, and DCFSA account options, and 401k retirement account access with employer matching. Employees in this role are also entitled to paid sick leave and/or other paid time off as provided by applicable law.