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Windows CNO Developer Security Clearance

Job in Herndon, Fairfax County, Virginia, 20170, USA
Listing for: System One Holdings, LLC
Full Time position
Listed on 2026-06-04
Job specializations:
  • IT/Tech
    Cybersecurity, Network Security, Systems Engineer
Job Description & How to Apply Below
Position: Windows CNO Developer with Security Clearance
Job Title:

Windows CNO Developer

Location:

Herndon, Virginia
Type:
Direct Hire / Salaried Contractor Work Model:
Onsite Security Clearance: CI Poly needed to start Join a top-tier aerospace & defense company supporting mission-critical national security operations. This role is part of a highly specialized offensive cyber team developing advanced Computer Network Operations (CNO) capabilities aligned with Intelligence Community objectives. You’ll work alongside elite engineers and operators on cutting-edge offensive tooling, contributing to some of the most technically challenging and sensitive cyber programs in the industry.

This is a long-term, well-funded effort backed by a Fortune 100 organization known for its innovation, stability, and investment in top cyber talent. Responsibilities

• Develop and implement offensive cybersecurity tools and techniques in C/C++ on Windows platform, with a focus on CNO (Computer Network Operations) activities.

• Design, write, and optimize code in C, C++, Objective-C, Swift, and Python to support offensive operations and reverse engineering tasks.

• Utilize debugging tools such as Win Dbg and reverse engineering tools like IDA Pro, Ghidra, Binary Ninja to analyze and improve code functionality.

• Analyze network protocols, sockets, and OS internals to identify vulnerabilities and exploit mitigation techniques such as DEP and ASLR.

• Collaborate with team members to develop and refine offensive cyber capabilities, ensuring adherence to best practices and security standards. Requirements

• Minimum of 3+ years of experience developing in C/C++ on Windows, with a focus on offensive cybersecurity work (e.g., CNO, CNE, CNA).

• Experience with designing, coding, and debugging in C, C++, Objective-C, Swift, and Python.

• Proficiency with assembly language reading/writing (x86, x64) and tools such as Win Dbg, IDA Pro, Ghidra, Binary Ninja.

• Understanding of network protocols, sockets, OS internals, and exploitation mitigation techniques (DEP, ASLR).

• Experience with version control systems like Git and understanding of configuration management principles.

• Ability to work on an onsite environment in Herndon, VA
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