Defensive Cyber Software Developer

VulnU; Lawton, Northern (OK, KY); Hybrid; USD 70,000 - 126,000; Full time

Benefits offered by this job

Retirement match

Paid parental leave

Equity

Job summary

Leidos is seeking a Defensive Cyber Software Developer in Lawton, OK to join the Cyber & Analytics Business Area. You will develop software to protect data and networks on tactical systems and research defensive techniques against adversarial threats.

The role requires a bachelor’s degree in a related field, 2+ years in C/C++/Rust/Go, and 2+ years of Python with Linux and version control experience. TS/SCI clearance is required, with potential travel to customer sites.

Qualifications

• ABET-accredited program in CS/CE/cyber engineering or similar required.
• Minimum 2 years of professional development in C/C++/Rust/Go.
• Minimum 2 years of Python and scripting languages.
• Experience with Linux and version control tools; familiarity with Agile/CD.

Responsibilities

• Develop software and techniques to protect data and networks on tactical systems.
• Research and develop signature and behavior-based defensive techniques against adversarial attacks.
• Collaborate with a development team to deliver quality, performant solutions.

Skills

C

C++

Rust

Go

Python

Linux

Git

Agile

Education

Bachelor’s Degree in Computer Science / Computer Engineering / Cyber Engineering

Tools

Jira

Jenkins

Job description

# Defensive Cyber Software DeveloperLeidos · leidos.comCategory: Security EngineeringLocation: Lawton, OKSalary: $69,550 – $125,725Clearance: TS/SCI## Quality of lifeWhat the posting states. Hover or tap a perk to see the line it came from.* Retirement match* Paid parental leave* EquityLeidos has a new and exciting opportunity for a Defensive Cyber Software Developer in our INTEL Sector's Cyber & Analytics Business Area (CABA). Our talented team is at the forefront in Security Engineering, Computer Network Operations (CNO), Mission Software, Analytical Methods and Modeling, Signals Intelligence (SIGINT), and Cryptographic Key Management. At Leidos, we offer competitive benefits, including Paid Time Off, 11 paid Holidays, 401K with a 6% company match and immediate vesting, Flexible Schedules, Discounted Stock Purchase Plans, Technical Upskilling, Education and Training Support, Parental Paid Leave, and much more. Join us and make a difference in National Security! The Defensive Cyber Software Developer will work with a diverse, highly skilled team to develop unique solutions for Cyber, EW, and PNT threats against US weapon systems. Our products are responsible for alerting our varied array of customers of potential cyber and EW attacks by creative Adversaries highly skilled at attacking. With that problem set in mind, our products need to be developed by equally creative minds that enjoy digging, researching, programming, questioning, and generally learning all they can do to do those exact things the Adversaries would. This is a full-time position with the Leidos Cyber Electromagnetic Activity (CEMA) team that is based in Lawton, OK, and will require the candidate to be able to obtain and maintain a TS/SCI security clearance. Primary Responsibilities:Developing software and/or techniques in the protection of data and networks on tactical systems as well as detection of, identification of and potential response to attacks.Researching and developing signature and behavior-based defensive techniques against adversarial attacks on tactical networks.Working with a development team to provide quality performant solutions that require collaboration with internal experts, deep analyses and understanding of impact on end-product/solution. Basic Qualifications:Bachelor’s Degree in computer science, computer engineering, cyber engineering or similar degree from an ABET-accredited programMinimum 2 years of professional development in C, C , Rust, Go, or similar compiled languagesMinimum 2 years of experience (professional or not) with Python and various scripting languages.Experience using Linux at a comfortable daily use levelExperience with version control toolsFamiliarity with an iterative software design process, such as Agile and/or Continuous Delivery, as well as common tooling associated with the process, such as Jira and JenkinsA good understanding of networking – protocols at all layers of the networking stack and network architecture.Knowledge of general software development best practicesMust be a US Citizen and be able to obtain and maintain a TS/SCI security clearance.Ability to travel to customer sites up to 20% of time Preferred Qualifications:Experience using WiresharkFirm understanding of CybersecurityBasic understanding of UI/UX principles along with familiarity of web developmentCertifications such as Network , Security , CySA , LinuxIf you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares.Original Posting:October 6, 2026For 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.Pay Range:Pay Range $69,550.00 - $125,725.00The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.