Principal CNO Software Engineer

Arlington, VA Until 9/21/2026 First posted July 23, 2026 Last posted July 23, 2026
Job description

Principal CNO Software Engineer

Zetier is seeking Principal CNO Software Engineers to develop operationally critical cyber capabilities. Candidates will demonstrate practical experience designing, developing, and deploying tools intersecting command and control, persistence, and networking.

Required:

  • Highly experienced with low-level programming (C/C++)
  • Experience developing in scripting languages (Python)
  • Highly experienced in systems software development (Linux/Windows kernel drivers)
  • Successfully developed cutting edge end-to-end cyber solutions
  • Effective communication with customers and teammates
  • Ability to obtain and maintain a U.S. security clearance

Desired:

  • Experience working in networking (802.11ac, Zigbee, GSM, SATCOM, SDN, UHF/VHF, 5g)
  • Integration with standard system libraries (POSIX, WIN32 API)
  • Development on embedded platforms (uBoot, drone firmware, IOT)
  • Reverse engineering experience (gdb, Binary Ninja, IDA Pro)
  • Familiar reading assembly / compiled programs (x86, x64, ARM)
  • Securely implemented cryptographic primitives (AES-GCM, SHA256, ECDSA)
  • Developed/patched version control software itself (git, svn, mercurial)
  • Developed software on mobile platforms (Android, iOS)
  • Successfully led small cross-domain development teams
  • Active U.S. security clearance

Zetier is proud to be an Equal Opportunity Employer. We celebrate diversity and do not discriminate on the basis of race, religion, color, sex, gender identity, sexual orientation, age, non-disqualifying physical or mental disability, national origin, veteran status or any other basis protected by law. All employment is decided on the basis of merit, qualifications, and business need.

About this role

Summary

Design, develop, and deploy cyber tools intersecting command, control, and networking.

Job title

Principal CNO Software Engineer

Experience level

highly experienced

Industry

cybersecurity

Location requirements

Arlington, VA, on-site work only

Salary

Not specified

Management role

No

Skills & keywords

Required skills

C/C++PythonLinuxWindowscyber solutionscommunication

Preferred skills

networkingPOSIXWIN32 APIembedded platformsreverse engineeringassemblycryptographyversion controlmobile platformsteam leadership

Specializations

low-level programmingsystems softwarecyber solutionsnetworkingembedded platforms
Locations

Structured locations inferred from the posting.

Arlington, VA, USA

On-site City