Full CV Resume

Work Experience

Microsoft

Principal Security Researcher — Autonomous Code Security

Apr 2026 - Present

Developed and productized MDASH, a multi-model agentic system orchestrating 100+ AI agents to discover, validate, and remediate vulnerabilities across Windows, Hyper-V, Azure, and identity systems; launched within three months. Also building a next-generation agentic system for binary analysis of Windows kernel drivers.

• Manager: Taesoo Kim

Georgia Institute of Technology

Postdoctoral Fellow — School of Cybersecurity and Privacy

Feb 2025 - Apr 2026

DARPA AIxCC 1st Place Winner (Team Atlanta): Built LLM-based autonomous fuzzing and exploit agents.

Led real-world AI offensive-capability evaluations and continued research on applying AI for security, yielding five papers, including USENIX Security, WOOT, EMNLP, and ASE (Distinguished Paper Award).

• Manager: Prof. Taesoo Kim

Samsung Security Center, Samsung SDS

Senior Engineer — Advanced Penetration Testing Group

Aug 2022 - Dec 2024 (2 years 5 months)

Conducted red team assessments at Samsung Security Center across Samsung affiliates’ products, services, and platforms, spanning enterprise AI systems, consumer devices, physical security systems, and kernel-level security mechanisms.

KAIST

Postdoctoral Researcher

Mar 2022 - Jul 2022 (5 months)

Led systems security research on cellular baseband and cyber-physical systems, resulting in USENIX Security and NDSS publications.

• Manager: Prof. Yongdae Kim

Pinion Industries

Research Intern

Dec 2013 - Feb 2014

Worked on automotive software and security, including CAN bus analysis, in-vehicle systems, AVN, telematics, smart keys, and ECU security.

KAIST CERT

Student CERT Team Lead

Sep 2010 - Aug 2012

Led KAIST Student CERT activities, including threat analysis and incident investigation for campus infrastructure.

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Education

KAIST

Ph.D. in Electrical Engineering

Mar 2016 - Feb 2022

Thesis: Improving Large-Scale Vulnerability Analysis of IoT Devices with Heuristics and Binary Code Similarity

• Advisor: Prof. Yongdae Kim

KAIST

M.S. in Electrical Engineering

Mar 2014 - Feb 2016

Thesis: Dissecting VoLTE: Exploiting Free Data Channels and Security Problems

• Advisor: Prof. Yongdae Kim

EURECOM

Visiting Scholar — Software and System Security

Jun 2014 - Jul 2014

• Advisor: Prof. Aurélien Francillon

KAIST

B.S. in Computer Science

Feb 2010 - Feb 2014

• Advisor: Prof. Jongmoon Baik

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Awards & Recognition

Academic Awards

Award	Venue	Paper	Date
Distinguished Paper Award	ASE 2026	CtxFuzz	Oct 2026
Distinguished Paper Runner-up	USENIX Security 2026	SoK: DARPA’s AI Cyber Challenge	Aug 2026

Security Competitions

Competition	Result	Team	Date
DARPA AIxCC	1st Place ($4M)	Team Atlanta	Aug 2025
DEF CON 27 CTF	Finals (12th/16)	KaisHack GoN	Aug 2019
DEF CON 26 CTF	Finals (21st/24)	KaisHack+PLUS+GoN	Aug 2018
WhiteHat Contest	1st Place ($30K)	Old GoatskiN	Nov 2017
HDCON	1st Place ($20K)	maxlen	Nov 2017
Codegate CTF	3rd Place ($5K)	Old GoatskiN	Apr 2017
DEF CON 24 CTF	Finals (5th/15)	KaisHack GoN	Aug 2016
WhiteHat Contest	1st Place ($20K)	SysSec	Nov 2014
DEF CON 22 CTF	Finals (10th/20)	KAIST GoN	Aug 2014
HDCON	Silver ($2K)	GoN	Dec 2013
WhiteHat Contest	1st Place ($20K)	KAIST GoN	Oct 2013
DEF CON 20 CTF	Finals (17th/20)	KAIST GoN	Jul 2012
HDCON	Silver ($2K)	KAIST GoN	Jul 2012
Codegate CTF	3rd Place ($5K)	KAIST GoN	Apr 2012
ISEC CTF	1st Place ($10K)	GoN	Sep 2011