Senior Security Researcher: Top Secret/SCI Clearance

Integration Innovation, Inc.; Arlington (VA); On-site; USD 124,000 - 208,000; Full time

Job summary

i3 is hiring a senior researcher to join a new security research team focused on rapid triage, reverse engineering, vulnerability discovery, and PoC exploit development. You will investigate unfamiliar systems, turn findings into reproducible evidence, and produce reports that others can act on.

Experience with LLMs and agent harnesses for technical investigations is required. U.S. Citizenship and Top Secret/SCI clearance considerations apply."

Qualifications

• 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 experience may substitute for degree.
• Proven ability to complete investigations independently from signal to PoC and final report.
• Depth in at least one technical area (native apps, OS, 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.

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 PoCs that demonstrate impact and document exploitation conditions.
• 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.

Skills

Vulnerability research

Reverse engineering

Exploit development

LLMs and agent harnesses

Education

Bachelor's degree in Computer Engineering/CS

Job description

i3 is hiring a senior researcher to join a new security research team focused on rapid triage, reverse engineering, vulnerability discovery, and PoC exploit development. You will investigate unfamiliar systems, turn findings into reproducible evidence, and produce reports that others can act on.

Experience with LLMs and agent harnesses for technical investigations is required. U.S. Citizenship and Top Secret/SCI clearance considerations apply."