Senior Security Researcher

Integration Innovation • Arlington, VA

7d

About The Position

i3 is hiring a senior researcher for a new security research team focused on rapid triage, reverse engineering, vulnerability discovery, and proof-of-concept exploit development. The researcher will independently investigate unfamiliar systems, turn initial findings into reproducible evidence, and produce actionable reports. Practical experience using LLMs and associated agent harnesses throughout technical investigations is required.

The role involves assessing reported behavior and exploitability, analyzing software and system artifacts, developing and documenting reliable proofs of concept, and using LLM-assisted workflows while independently verifying generated conclusions and code. The researcher will also build reusable tools and contribute to peer review and shared documentation.

The position requires an active Top Secret/SCI clearance and U.S. citizenship. i3 is a 100% team member-owned business headquartered in Huntsville, Alabama. Its work spans missile and aviation systems engineering, electronic warfare, UAS integration, C5ISR, cybersecurity and IT/IA, and virtual training and simulation.

Requirements

• At least 4 years in vulnerability research, reverse engineering, exploit development, or closely related security engineering.
• Bachelor’s degree in Computer Engineering, Computer Science, or a related technical field; additional years of experience may substitute for the degree.
• Demonstrated ability to complete investigations independently, from initial signal through proof of concept and final report.
• Depth in at least one relevant technical area, such as native applications, operating systems, firmware, or web services.
• Strong programming and debugging skills.
• Hands-on experience configuring and using LLMs and agent harnesses for technical work.
• Clear technical writing and sound judgment about evidence, uncertainty, and research priorities.
• Active Top Secret/SCI security clearance.
• U.S. citizenship.

Nice To Haves

• Experience with fuzzing, program analysis, harness development, or research automation.

Responsibilities

• Triage incoming findings, reproduce reported behavior, and assess impact and exploitability.
• Analyze source code, binaries, protocols, and runtime behavior to identify vulnerabilities and root causes.
• Develop reliable proofs of concept demonstrating impact and document the conditions required for exploitation.
• Write clear reports covering evidence, reproduction steps, root cause, impact, limitations, and remediation considerations.
• Use and troubleshoot LLM-assisted workflows for analysis, experimentation, coding, and report preparation.
• Independently verify model-generated conclusions and code.
• Build reusable research tools and contribute to peer review and shared documentation.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior