Bio: Christian Yongwhan Lim is a Principal Engineer at Fun.xyz, an Associate in Computer Science at Columbia University, where he serves as the Head Coach for its ICPC team. He is passionate about teaching competitive programming and volunteers as the ICPC Internship Manager and ICPC Judge for North America Regionals (Mid-Central, North Central, Southern California, and Greater New York) and the North America Qualifier. Christian is one of the trainers at the ICPC North America Championship and North America Programming Camp (NAC-NAPC). He co-leads the Competitive Learning Institute (CLI) Symposium at the ICPC World Finals in Astana and the ICPC Curriculum Committee. Previously, Christian was the Owner of Christian and Grace Consulting, a Research Software Engineer at Google for nearly six years, and a Senior Quantitative Software Engineer at Two Sigma Investments for over six months. He pursued a PhD program in Operations Research at MIT for approximately three years under the guidance of Professor Asuman Ozdaglar. Christian holds a BS in Computer Science and Mathematics (double major) and an MS in Computer Science, both from Stanford University.