Senior CNO Operator

Senior CNO Operator

Location: Northern Virginia
Travel: Up to 5%, and various sites local to Northern Virginia
Clearance: Top Secret clearance required
Citizenship: US Citizenship required

Grimm is an innovative, forward-looking cybersecurity organization focused on solving complex technical challenges across hardware, firmware, and software systems. Our teams specialize in reverse engineering, vulnerability research, and security engineering, supporting mission-critical efforts across national security, defense, and critical infrastructure sectors.

Our work is rooted in real-world operational experience identifying advanced threats, uncovering critical vulnerabilities, and developing meaningful solutions to complex problems. Grimm engineers operate across embedded systems, vehicles, IoT, and enterprise technologies, with a focus on understanding systems deeply and demonstrating real-world impact.

We are a highly technical and hands-on organization. Our engineers and researchers specialize in breaking systems, discovering vulnerabilities, and improving resilience—working directly with real hardware and software to understand how systems function and how they fail.

Grimm is seeking multiple Senior CNO Operators to work directly with software, firmware, and embedded systems.

In this role, you will provide on-site support in research and development of software designed to exploit vulnerabilities of adversary technology, algorithm development, script writing and software utility development, analysis and reverse engineering of source code, software integration and testing, technical writing and documentation, and lifecycle maintenance of customer software programs. You will also contribute to, or conceive of, tooling supporting engineering efforts to improve efficiency and automate tasking.

We’re looking for individuals who are curious, driven, and enjoy working at the lowest levels of systems—those who aren’t satisfied until they fully understand how something works.

• Lead capability development which includes, but not limited to technology research, vulnerability assessment, software development
  , capability integration, system test, and product maintenance.
• Ownership and technical leadership of software development and reverse engineering efforts
• Provide technical expertise and advise project proposals to include scoping, level of effort, staffing, and what's needed to deliver a capability
• Responsible for end-to-end design and development of custom software for mobile, desktop, and virtual platforms
• Mentor and lead junior-level developers to accomplish mission objectives
• Reverse engineer automotive firmware and embedded systems
• Develop tooling for protocol analysis, fuzzing, and exploitation
• Perform binary analysis using tools such as Ghidra, IDA Pro, or Binary Ninja
• Research and develop novel attack techniques against target systems
• Collaborate with cross-functional teams spanning software, hardware, and cybersecurity

• Active Top Secret clearance
• US Citizenship
• Experience in one or more of the following areas:
  • Experience performing Low-level development with major operating system experience for Android, iOS, Windows, OS-X, or Linux
  • Proficient with C and common assembly languages (e.g. x86, arm)
  • Proficient with a disassembler like IDA Pro, Ghidra, or Binary Ninja
  • Experience with static and dynamic analysis techniques
  • Ability to reverse engineer binaries written in C/C++
  • JavaScript development
  • ARM/AARCH
    64 Assembly development C programming
  • Understanding of exploit mitigations such as ASLR, DEP, PXN, ROP
  • Knowledge of V8, JIT, Web Kit
  • Networking Development
• Reverse engineering or vulnerability research
• Strong understanding of low-level systems (memory, system architecture, firmware)
• Demonstrated experience in software integration and testing, technical writing and documentation
  , and lifecycle maintenance of customer software programs.
• Proven experience in script writing and software utility development.
• Ability to clearly communicate technical findings in both written and verbal formats to the highest levels - prepare and present analytical documents for senior…