M9 Solutions is seeking a Senior Vulnerability Researcher – Windows / CNE to work on-site in support of a government contract for a client located in Arlington, VA. An active TS/SCI clearance is required.

Responsibilities

• Lead advanced vulnerability research on Windows operating systems, applications, and core OS components (including kernel and drivers).
• Analyze, reverse engineer, and understand complex vulnerabilities to support CNE/CNO missions.
• Use tools such as IDA Pro, Ghidra, Binary Ninja, and WinDbg/x64dbg for in‐depth binary analysis and debugging, including creating or extending custom tooling when needed.
• Own end‐to‐end research on difficult, poorly documented Windows targets with minimal guidance, from scoping and experimentation through proof‐of‐concept.
• Develop and document technical approaches, findings, and PoCs to validate vulnerabilities and exploitation paths.
• Continuously explore and prototype novel techniques for vulnerability discovery and exploitation on modern, mitigated Windows platforms.
• Collaborate with mission and engineering teams to translate research into operational capabilities.
• Act as the senior technical point of contact and subject‐matter expert for Windows vulnerability, exploitation, and OS‐internals questions.

Required Skills and Qualifications

• Active TS/SCI clearance.
• 3+ years in vulnerability research, exploit development, or CNE‐focused reverse engineering, with a sustained focus on Windows (user and kernel mode) rather than general app security or pen‐testing.
• Deep, practical understanding of Windows internals (kernel architecture, drivers, memory management, system calls, process/thread models, and security mechanisms).
• Strong CNE/CNO background; experience leveraging vulnerabilities in support of real‐world operations or mission environments.
• Demonstrated track record solving very hard, low‐level technical problems with minimal guidance, including on research efforts where many others have struggled to make progress.
• Demonstrated experience discovering and exploiting non‐trivial vulnerabilities in modern, mitigated Windows environments (e.g., ASLR, DEP, CFG, virtualization‐based security).
• Hands‐on experience with reverse engineering and debugging tools (IDA Pro, Ghidra, Binary Ninja, WinDbg, x64dbg, etc.).
• Fluency in x86/x64 assembly and strong C/C++ skills, plus scripting experience (e.g., Python) for automation, tooling, and PoCs.
• Strong analytical mindset and ability to clearly communicate complex technical findings to both technical and non‐technical stakeholders.