Professor Koo received his doctorate of jurisprudence degree from the Northwestern University School of Law (Dean's List), his master's degree in management from Harvard University with honors, and his master of laws degree in Corporations Law from the New York University School of Law.

He was a corporate associate with the law firm of Kirkland & Ellis LLP where he practiced venture capital, private equity, and general corporate law. 

Professor Koo is also a co-founder of a sports and entertainment management and media company and a family-owned real estate company. He has served as senior legal counsel, and advisor for leading multinational corporations in the telecommunications, video gaming, consumer electronics, and display industries based in the Republic of Korea and the United States. He also represents public figures in sports and entertainment. 

Prior to Handong, Professor Koo was an adjunct law professor at Kyoung Hee University, Sookmyung Women’s University and Seoul National University.

Professor Koo’s areas of interest include Sports and Entertainment Law, Alternative Dispute Resolution, Corporate Law, Entrepreneurship, and Legal Writing.