At the end of the 1990, Kooiman moved to Mexico.[4] He began with Cobras de Ciudad Juarez, of the Mexican Premier Division before moving to Cruz Azul in Mexican Premier League. While with Cruz Azul, he became the first U.S. citizen to captain a Mexican soccer team. In 1994, he moved to Atlético Morelia.[5]
MLS
In 1996, the newly established Major League Soccer (MLS) distributed "marque" players throughout the league's teams. Kooiman was allocated to the Tampa Bay Mutiny.[6] He would play two seasons with the Mutiny, but at the end of the 1997 season, the Mutiny left him exposed in the 1997 MLS Expansion Draft. The Miami Fusion selected Kooiman in the first round (14th overall) and he would play a single season for that team.[7][8][9][10][11]
International
Kooiman earned his first cap with the national team in 1993. He would eventually play 12 games with the national team, scoring a single goal and participating in the 1994 FIFA World Cup, where he played the full 90 minutes in the U.S.'s opening game against Switzerland.[12]
Personal life
Kooiman was diagnosed with aggressive prostate cancer in February 2018.[13]