Cyber Software Engineer/Developer

Full Time
San Antonio, TX
Areas of Interest: Software Assurance and Security Engineering
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End-to-end design, development and standard developer testing, providing pertinent documentation, toolchain/helper tool development, use of debuggers, disassemblers and other diagnostic software, participating in design meetings, and providing assistance to other developers as well as other duties as needed.


We are looking for candidates with a combination of a number of the following skills:

Programming skills including:

  • C/C++ in Windows (Win32 or Native API) and/or POSIX (Linux, OS X)
  • x86/x86_64 assembly language
  • Python and XML
  • Loadable kernel modules (LKM)
  • POSIX to maintain compatibility between operating systems
  • GCC and cross compilation
  • Executable and Linkable Format (ELF)
  • Disassemblers such as Interactive Disassembler (IDA Pro) for hostile code analysis, vulnerability research, COTS validation, and/or privacy protection.

Debugging skills including:

  • Unix applications and kernel mode code
  • Assembly based debugging of user space software

Source code version control including:

  • Subversion
  • Git

Software security technologies and how they operate and protect software from an attacker including:

  • Address Space Layout Randomization (ASLR)
  • Data Execution Prevention (DEP)
  • Structured Exception Handler Overwrite Protection (SEHOP)
  • Mandatory Integrity Control (MIC)


The successful candidates must be currently eligible for an active DoD TS/SCI clearance and will have developed in C/C++ and/or x86 and x86_64 assembly on a variety of platforms including Windows, Linux, OS X and Mac OS.


No attachments will be accepted. Please email content of resume, references, work samples and preferred location (if applicable) by clicking on "Apply"


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Founded in 2011, root9B is a dynamic provider of cyber security and advanced technology training capabilities, operational support and consulting services. root9B’s personnel are internationally recognized and trusted providers of advanced cyber solutions, satisfying requirements for missions and enterprises globally. We are dedicated to the delivery of solutions and services based on technical innovation and professional excellence. 

root9B’s workforce consists of US military and Law Enforcement veterans with extensive experience providing advanced technology solutions. root9B offers world class cyber training capabilities, consulting services, and test range operations. root9B personnel understand the full spectrum of kinetic and non-kinetic effects and their impact to offensive and defensive cyber operations. We develop tactics, techniques, and procedures to advance operations through the use of cyberspace.

Vulnerability Assessments, Computer Network Operations, Computer & Mobile Forensics, Mobile Cyber Protection, Cyber Exercise, Curriculum, & Tool Development, SCADA Security Operations, Malware Analysis & Reverse Engineering, Data Breach Prevention & Remediation
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Company Industry: Information Technology and Services
Company Type: Public Company
Company Size: 11 - 50