Application Security Engineer

Talentify; O'Fallon (IL); On-site; USD 75,000 - 158,000; Full time

Job summary

CACI is seeking an Application Security Engineer to embed security into the software development lifecycle in support of a DoD mission. You will work with developers and architects to identify, validate, and remediate vulnerabilities across diverse applications.

You will perform SAST/DAST, conduct secure code reviews, and lead penetration testing engagements while ensuring DoD requirements are met. Expect collaboration across architecture, GRC, and operations teams in a growing program.

Qualifications

• 3–5 years of experience in application security, secure development, or penetration testing.
• Hands‑on experience with SAST platforms (Fortify preferred).
• Working knowledge of OWASP Top 10 and common application vulnerability classes.
• DoD 8140.03M DCWF Basic Tier — CEH.
• DoD 8140 Interim Education Options; Required travel to Scott Air Force Base quarterly.

Responsibilities

• Embed robust security practices into the secure SDLC from design through deployment.
• Execute static (SAST) and dynamic (DAST) application security testing using enterprise tooling.
• Lead and support penetration testing engagements, guiding developers through remediation.
• Coordinate with cybersecurity program teams (architecture, GRC, operations).
• Grow expertise across AppSec spectrum: code review, runtime testing, and compliance validation.

Skills

Application security

Secure SDLC

Penetration testing

SAST/DAST

OWASP Top 10

Cybersecurity

Education

Bachelor’s degree in Computer Science or related field

DoD 8140.03M DCWF Basic Tier — CEH

DoD 8140 Interim Education Options

Tools

Fortify

SonarQube

Job description

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 mission‑driven cybersecurity team securing applications that support a critical DoD mission. In this role, you’ll embed security directly into the software development lifecycle, partner with developers and architects, and use industry‑leading 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 program—including 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

• Active Secret or TS clearance
• 3–5 years of experience in application security, secure development, or penetration testing
• Hands‑on 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, FITSP‑A, GCED, GCIH, GCSA, GICSP, GSEC, PenTest+, or Security+
• Bachelor’s 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, you’ll be part of a high-performing group dedicated to our customer’s 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. You’ll 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 nation's 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:

$75,200-$158,100

CACI is an Equal Opportunity 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 other protected characteristic.