[Skip to main content](#main-content) [OpenNash Jobs](https://jobs.opennash.com/) [Hiring report](/reports/hiring/) · [All Leidos jobs](https://jobs.opennash.com/companies/leidos/) · [Search jobs](/search/) Leidos · Lawton, OK # Defensive Cyber Software Developer Lawton, OK $57,850.00 - $104,575.00 Software Engineering Listed on Leidos’s official careers site. Posted October 8, 2026. Check that it is still open and apply there. [Apply on Leidos’s careers site →](https://leidos.wd5.myworkdayjobs.com/External/job/Lawton-OK/Defensive-Cyber-Software-Developer_R-00194120) [OpenNash Jobs](https://jobs.opennash.com/) / [Leidos](https://jobs.opennash.com/companies/leidos/) / Defensive Cyber Software Developer ## Job description Leidos Dynetics is seeking an Entry Level Defensive Cyber Software Developer to 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. Since those adversaries have such a board scope, our approach to developing detection measures and mitigations need to be as well. This position will grow and shift depending on skill sets gained as well as needs identified, as all the positions in our department do. Initially, we are seeking someone with skills focused primarily on software development for cyber intrusion detection systems. 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 Clearance. ### Primary Responsibilities Working with a team to develop 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. Developing technical solutions that require collaboration with internal experts, deep analysis and understanding of impact on end-product/solution. Researching toward development of signature and behavior-based defensive techniques against adversarial attacks on tactical networks. ### Basic Qualifications Bachelor’s Degree in computer science, computer engineering, cyber engineering, or similar degree Experience (professional or not) development in C, C++, Rust, Go, or similar compiled languages Experience (professional or not) with Python, or scripting languages. Basic understanding of networking – protocols at all layers of the networking stack and network architecture. Familiarity in Linux, basic navigation and editing US Citizenship required Must be able to obtain and maintain a TS/SCI Clearance Ability to travel to customer sites up to 20% of time ### Preferred Qualifications - Familiarity using Wireshark - Familiarity with basic cybersecurity concepts - Familiarity 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 Jenkins Certifications such as Network+, Security+, CySA+, Linux If 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 7, 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. ### Pay Range Pay Range $57,850.00 - $104,575.00 The 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. ## At a glance - Posted by the employer: Oct 8, 2026 - First seen by OpenNash: Oct 11, 2026 - Last checked: Oct 18, 2026 - Listed for: 10 days - Location: Lawton, OK - Pay: $57,850.00 - $104,575.00[Apply on Leidos’s careers site →](https://leidos.wd5.myworkdayjobs.com/External/job/Lawton-OK/Defensive-Cyber-Software-Developer_R-00194120) ## More jobs at Leidos ### [Defensive Exploit Software Developer](https://jobs.opennash.com/companies/leidos/jobs/a868d26b49be468c51b2/) Lawton, OK ### [Software Tester](https://jobs.opennash.com/companies/leidos/jobs/f58bc4650fcede7519ca/) Lawton, OK ### [Cyber Analyst](https://jobs.opennash.com/companies/leidos/jobs/a22e18e62232fe866ce0/) Lawton, OK ## Similar jobs at other companies ### [Defensive Cyber Operations Analyst](https://jobs.opennash.com/companies/booz-allen-hamilton-holding/jobs/8be54048ce43903160ed/) Booz Allen Hamilton Holding · Peterson AFB, CO ### [Defensive Cyber Operations SME](https://jobs.opennash.com/companies/booz-allen-hamilton-holding/jobs/3af32d251d56647c2f66/) Booz Allen Hamilton Holding · Arlington, VA ### [Cyber Software Engineer](https://jobs.opennash.com/companies/lockheed-martin/jobs/45880388fe99d6a8a107/) Lockheed Martin · Manassas, VA ### [Recurrent Training Instructor - Firearms, Defensive Tactics/measures, and Use of Force - Part time/on call](https://jobs.opennash.com/companies/general-dynamics/jobs/5f1870589be55397a18f/) General Dynamics · Atlanta, GA, US OpenNash lists jobs from employers’ own careers sites and does not handle applications. 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