Ian de Marcellus
Security researcher & software engineer, focused on AI systems
About
I'm interested in security, AI, and understanding complex systems. Currently focused on LLM internals, fine-tuning, and alignment: both the technical foundations and the harder questions about how to build these systems well. Based in San Francisco.
Harvey Mudd College — BS with High Distinction, Joint Mathematics & Computer Science
Selected Work
Security Vulnerability Research
Discovered and responsibly disclosed two security vulnerabilities to Apple with proof-of-concept demonstrations.
BGP Security Research
Conducted analysis of BGP protocol vulnerabilities and demonstrated hijacking attacks in a controlled five-router environment. Academic clinic project with Juniper Networks.
Incident Timeline MCP Server
Open-source tool for extracting structured data from incident response logs. Built with Python and the Model Context Protocol.
LLM Fine-tuning Research
Ongoing experiments with LoRA fine-tuning, custom training data, and alignment approaches. Exploring how training methods shape model behavior.