Rockne DeCoster joined the Caltech men's soccer staff in January 2023.

DeCoster comes to Caltech from Grinnell College where he was the assistant men’s soccer coach for four seasons. While at Grinnell, he recruited and coached multiple All-Conference and All-Region players, in addition to the 2021 CoSIDA All-American Player of the Year. He also helped the team reach back-to-back conference tournaments in 2021 and 2022.

A Grinnell College alum, DeCoster was an All-Midwest Conference player and graduated with a bachelor's degree in psychology. He earned his master’s degree in education from Concordia University and holds a National Diploma from United Soccer Coaches, as well as grassroots coaching licenses through US Soccer.