Tommy Choi co-founded the Weinberg Choi Residential team in 2007 with his business partner Josh Weinberg. The Weinberg Choi Residential team has sold over 2,000 properties and over $1 billion dollars in sales volume. They are consistently ranked in the top 10 real estate teams in Chicago, which puts them in the Top 1% of Chicago Association of Realtors' top producers. They celebrated the opening of their own Keller Williams brokerage in Chicago in January of 2017. Tommy also served as the 135th president of the Chicago Association of Realtors and the first Korean-American president in the association's 139-year history. He currently serves as the president-elect of the Illinois Realtors. In 2021, he was the Vice President of Association Affairs for the National Association of Realtors. In 2020 he received Realtor of the Year by the Chicago Association of Realtors and was recognized in the 2020 class of Crain’s Business Chicago 40 under 40.