Mid-level Defensive Cyber Software Engineer

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Leidos Defense Systems 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. To explore and learn more, click here!

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Leidos Defense Systems is seeking a Mid-Level Defensive Cyber Software Engineer to work with a diverse, highly skilled team to develop unique solutions for Cyber, EW, and PNT threats against US weapon systems. This position will specifically focus on leading and executing the development of network security detection algorithms for tactical edge intrusion detection systems. This position will also focus on vulnerability research and prioritization of software development tasks. This is a full-time position with the Leidos Cyber Electromagnetic Activity (CEMA) team that is based in Huntsville, Alabama.

Primary Responsibilities

• Developing software and/or techniques in the protection of data, networks and net-centric capabilities, as well as detection of, identification of and response to attacks.

• Research and development of signature and behavior-based defensive techniques against adversarial attacks on tactical networks.

• Developing technical solutions that require collaboration with internal experts, deep analyses and understanding of impact on end-product/solution.

• Developing solutions to technical problems and issues through research and experimentation.

Basic Qualifications

• Bachelor’s Degree in computer science, computer engineering, or similar degree.

• Candidate must have the following experience in defensive cybersecurity areas identified above:

• 5+ years of professional development in C, C++, Rust, Go, or similar compiled languages

• A good understanding of networking – protocols at all layers of the networking stack and network architecture.

• Experience with Agile development workflows

• Knowledge of general software development best practices

• Comfortable with software build systems, such as CMake, Meson, or Bazel

• Experience with version control tools

• Comfortable with CI/CD tools such as Jenkins or TeamCity

• Experience using Wireshark

• Experience developing cross platform software targeting systems such as Linux, Windows, Embedded devices, and Server-grade hardware

• US Citizenship required

• Must be able to obtain and maintain a TS/SCI Clearance

Preferred Qualifications

• Experience with Git

• Hands-on experience within a security operations center (SOC).

• Experience with Network Security Monitoring (NSM)

• Hands-on experience with blue/purple/red-teaming US DOD systems and/or networks

• Certifications such as Network+, Security+, CySA+, Linux+

Original Posting:

March 28, 2025

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 $85,150.00 - $153,925.00

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.