Cyber Software Engineer

Leidos; Huntsville (AL); On-site; USD 87,000 - 157,000; Full time

Job summary

Leidos is seeking a UAS Cyber SW Engineer to join the S3I Joint Technology Center in Huntsville, AL. You will bridge software engineering and cybersecurity, contributing to secure software throughout the lifecycle and ensuring DoD cybersecurity requirements are met in an Agile environment.

The role focuses on security architecture, vulnerability remediation, RMF artifacts, and automated pipelines. A DoD clearance and Level II baseline certification are required.

Qualifications

• Bachelor's in Software or Computer Engineering with 4 years of experience, or a Master’s in Cyber Security with 2 years of experience.
• U.S. citizenship and ability to obtain/maintain a Secret clearance.
• DoD 8570/8140 IAT Level II baseline certification (e.g., Security+ CE, CySA+).
• Excellent written and verbal communication.

Responsibilities

• Secure embedded and application software lifecycle design, coding, testing and integration.
• Perform static/dynamic analysis using Parasoft, Coverity, Fortify to identify vulnerabilities.
• Automate security controls including DISA STIGs/SRGs across Linux, databases and app baselines.
• Review security impact of requirements and merge requests for risk mitigation.
• Integrate security testing in CI/CD pipelines (Azure DevOps, Git).
• Analyze vulnerability outputs (ACAS/Nessus) and plan remediations.
• Support RMF artifacts and maintain software/firmware inventories and PPSM docs.
• Collaborate in Agile/Scrum ceremonies with cross-functional teams.

Skills

Rust

C/C++

OOP languages

Agile/Scrum

CI/CD tools

Education

Bachelor’s degree in Software or Computer Engineering

Master’s in Cyber Security related field

Tools

Git

Visual Studio

Job description

Looking for an opportunity to make an impact? At Leidos, we deliver innovative solutions through the efforts of our diverse and talented people who are dedicated to our customers’ success. We empower our teams, contribute to our communities, and operate sustainably. Everything we do is built on a commitment to do the right thing for our customers, our people, and our community. Our Mission, Vision, and Values guide the way we do business. Your greatest work is ahead! Leidos’ Defense Uncrewed Systems Integration and Test is seeking a motivated and ambitious UAS Cyber SW Engineer to join the Software, Simulation, Systems Engineering and Integration Directorate (S3I) Joint Technology Center – Systems Integration Lab (JSIL) Technology and Certification Center. As a UAS Cyber SW Engineer, you’ll be an integral part of a dynamic engineering team that supports UAS cyber systems. This role bridges the gap between software engineering and cybersecurity. The candidate will be responsible for the security architecture, secure coding, static/dynamic code analysis, and vulnerability remediation for critical application software across the full software development lifecycle. Working directly within an Agile/Scrum team, the candidate will ensure complex systems meet rigorous DoD cybersecurity requirements (such as DISA STIGs/SRGs and RMF standards) while actively contributing to modern continuous integration and automated software delivery pipelines. If this sounds like the kind of environment where you can thrive, keep reading! Leidos Defense Sector provides a diverse portfolio of systems, solutions, and services covering land, sea, air, space, and cyberspace for customers worldwide. Solutions for Defense include enterprise and mission IT, large-scale intelligence systems, command and control, geospatial and data analytics, cybersecurity, logistics, training, and intelligence analysis and operations support. Our team is solving the world’s toughest security challenges for customers with “can’t fail” missions.

Primary Responsibilities

• Secure Software Development & Engineering: Participate in the full lifecycle design, coding, testing, and integration of secure embedded and application software for military systems using C/C++ and Object-Oriented methodologies.
• Static & Dynamic Code Analysis: Perform, analyze, and track static and dynamic code analysis scan results (e.g., Parasoft, Coverity, Fortify) to identify vulnerabilities, eliminate security flaws, and guide development remediation efforts.
• Security Control Implementation & Hardening: Work with cross-functional software teams to implement and automate technical security controls, including DISA STIGs, SRGs, and industry best practice hardening guidelines across Linux, databases, and application baselines.
• Security Code & Architecture Reviews: Evaluate software requirements, system design changes, and proposed merge requests for security impact to determine authorization and risk mitigation.
• CI/CD & Pipeline Security (DevSecOps): Integrate automated security testing and compliance checks within CI/CD pipelines (e.g., Microsoft Azure DevOps, Git).
• Vulnerability Scanning & Remediation: Analyze vulnerability scan outputs (such as ACAS/Nessus) to develop and implement code- or configuration-level remediation plans.
• RMF & Artifact Support: Assist in updating Risk Management Framework (RMF) artifacts, including software/firmware inventories, interface specifications, and Ports, Protocols, and Services Management (PPSM) documentation.
• Cross-Discipline Collaboration: Actively participate in Agile/Scrum ceremonies, technical interchange meetings, and hardware/software design reviews alongside Systems, Cyber, Safety, Operations, and Test teams.

Basic Qualifications

• The candidate must have a Bachelor’s degree in Software or Computer Engineering or a related STEM field from an accredited institution with four (4) years of applicable experience, or an additional Masters degree in a Cyber Security related field with two (2) years of experience.
• U.S. citizenship, an active DoW Secret Security Clearance and the ability to maintain a Secret Clearance are required.
• Must hold or be willing to acquire a current DoD 8570/8140 IAT Level II baseline certification (e.g., CompTIA Security+ CE, CySA+, or higher/equivalent).
• Excellent written and verbal communication skills.

Preferred Qualifications

• Strong hands‑on programming experience with Rust, C/C++ or other Object-Oriented languages.
• Direct experience running and interpreting Static Code Analysis tools (e.g., Fortify, Sonarqube, Parasoft).
• Practical understanding of DISA STIGs/SRGs and application security (AppSec) hardening.
• Experience operating within an Agile/Scrum software development environment.
• Experience with source control, build systems, and CI/CD tools (e.g., Git, Visual Studio, etc.).
• Strong working knowledge of Linux and Windows operating environments.
• Strong written and verbal communication skills with the ability to interact effectively with customer stakeholders and multi-disciplinary teams.

Pay Range

Pay Range $87,100.00 - $157,450.00 The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary.

Pay and Benefits

• Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement.

More details are available here.

Commitment and Diversity

All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law.

Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.

Original Posting: October 19, 2026 For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.

Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $17.2 billion for the fiscal year ended January 2, 2026. For more information, visit www.Leidos.com.