Enter a job title or keyword

Application Security Engineer

CACI


Job Location:

O'Fallon, MO - USA

Yearly Salary: USD 75200 - 158100
Posted: 29 September 2026 (Yesterday)
Application Deadline: 27 December 2026
Vacancies: 1 Vacancy

Job Summary

Job Title: Application Security Engineer

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

* * *

The Opportunity:

Join a missiondriven cybersecurity team securing applications that support a critical DoD mission. In this role youll embed security directly into the software development lifecycle partner with developers and architects and use industryleading tools to identify validate and remediate vulnerabilities across a diverse application ecosystem.

You will:

  • Embed robust security practices into the secure SDLC from design through deployment

  • Execute both static (SAST) and dynamic (DAST) application security testing using enterprise tooling

  • Lead and support penetration testing engagements guiding developers through actionable remediation

  • Work within a fully staffed cybersecurity programincluding architecture GRC and operations experts

  • Grow your expertise across the AppSec spectrum: code review runtime testing and compliance validation


Responsibilities:

  • Perform SAST using Fortify across assigned applications

  • Conduct continuous code quality and security analysis using SonarQube

  • Execute DAST to identify runtime vulnerabilities

  • Coordinate and execute penetration testing engagements

  • Conduct secure code reviews and document findings with actionable guidance

  • Track and verify vulnerability remediation through closure

  • Validate application security controls against program and DoD requirements

  • Author application security assessment and penetration test reports

  • Support the Cybersecurity Architect with secure SDLC process design


Qualifications:

Required:

  • Active Secret or TS clearance

  • 35 years of experience in application security secure development or penetration testing

  • Handson experience with SAST platforms (Fortify preferred)

  • Working knowledge of OWASP Top 10 and common application vulnerability classes

  • Demonstrated experience conducting or supporting penetration tests

  • DoD 8140.03M DCWF Basic Tier CEH

  • DoD 8140 Interim Education Options

    Required to travel to Scott Airforce base on a quarterly basis


Desired:

  • DoD 8140.03M DCWF Intermediate Tier one of: CEH(P) RCCE Level 1 Cloud CPTE FITSPA GCED GCIH GCSA GICSP GSEC PenTest or Security

  • Bachelors degree in Computer Science Cybersecurity Data Science Information Systems IT or Software Engineering

  • Experience with SonarQube or similar secure code analysis platforms

  • Familiarity with DevSecOps pipelines and CI/CD security integration

  • Scripting or development experience in Python Java or similar languages

-


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

Company Logo

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

View Profile View Profile