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Information Systems Security Engineering (ISSE)

CACI


Job Location:

O'Fallon, MO - USA

Monthly Salary: $ 75200 - 158100
Posted: 26 August 2026 (21 hours ago)
Application Deadline: 23 November 2026
Vacancies: 1 Vacancy

Job Summary

Job Title: Information Systems Security Engineering (ISSE)

Job Category: Information Technology

Time Type: Full time

Minimum Clearance Required to Start: Secret

Employee Type: Regular

Percentage of Travel Required: Up to 10%

Type of Travel: Local

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The Opportunity:

Step into a handson security engineering role where you will work across a dynamic mix of onpremise and cloud DoD environments. This position offers the chance to apply and grow your technical skills while collaborating closely with expert GRC operations and architecture teams. You will build deep mastery in STIG compliance vulnerability management and PAM securitywhile developing a powerful technical toolkit using STIGviewer SCAP Tenable and CyberArk. With dedicated mentorship and exposure to complex engineering challenges this role provides a strong pathway toward senior security engineering positions.


Responsibilities:

  • Implement and document STIG configurations across assigned systems and platforms

  • Conduct Security Impact Analyses (SIAs) for proposed changes

  • Run automated configuration validation using SCAP Compliance Checker

  • Manage vulnerability tracking and remediation workflows within Tenable SC

  • Evaluate cloud infrastructure security posture using Tenable Cloud Security

  • Support CyberArk PAM setup and privileged access management

  • Create and maintain secure configuration baselines

  • Write detailed technical security control implementation guides

  • Partner with the Cybersecurity Architect on technical security implementations


Qualifications:

Required:

  • Active Secret or TS clearance

  • 35 years of security engineering or systemhardening experience

  • Handson experience with STIGviewer and SCAP Compliance Checker

  • Working experience with Tenable SC or similar vulnerability management platforms

  • Strong knowledge of secure configuration management principles

  • DoD 8140.03M DCWF Basic Tier: CEH
  • DoD 8140 Interim Education Options


Desired:

  • Experience administering CyberArk PAM

  • Familiarity with Tenable Cloud Security or comparable cloud assessment tooling

  • Exposure to DoD cloud environments (IL2IL6)

  • DoD 8140.03M DCWF Intermediate Tierone of the following: CEH(P) RCCE Level 1 Cloud CPTE FITSPA GCED GCIH GCSA GICSP GSEC PenTest or Security
  • Bachelors degree in Cybersecurity Computer Science Data Science Information Systems Information Technology or Software Engineering

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What You Can Expect:

A culture of integrity.

At CACI we place character and innovation at the center of everything we do. As a valued team member youll be part of a high-performing group dedicated to our customers missions and driven by a higher purpose to ensure the safety of our nation.

An environment of trust.

CACI values the unique contributions that every employee brings to our company and our customers - every day. Youll have the autonomy to take the time you need through a unique flexible time off benefit and have access to robust learning resources to make your ambitions a reality.

A focus on continuous growth.

Together we will advance our nations most critical missions build on our lengthy track record of business success and find opportunities to break new ground in your career and in our legacy.


Pay Range:

There are a host of factors that can influence final salary including but not limited to geographic location Federal Government contract labor categories and contract wage rates relevant prior work experience specific skills and competencies education and certifications. Our employees value the flexibility at CACI that allows them to balance quality work and their personal lives. We offer competitive compensation benefits and learning and development opportunities. Our broad and competitive mix of benefits options is designed to support and protect employees and their families. At CACI you will receive comprehensive benefits such as; healthcare wellness financial retirement family support continuing education and time off benefits.

Since this position can be worked in more than one location the range shown is the national average for the position.

The proposed salary range for this position is:

$75200-$158100

CACI is anEqualOpportunity Employer. All qualified applicants will receive consideration for employment without regard to race color religion sex pregnancy sexual orientation age national origin disability status as a protected veteran or any otherprotectedcharacteristic.


Required Experience:

IC


About Company

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CACI employs a diverse range of talent to create an environment that fuels innovation and fosters continuous improvement and success. At CACI, you will have the opportunity to make an immediate impact by providing information solutions and services in support of national security miss ... View more

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