Colangelo joins the Nittany Lions after six years with Villanova.
Johnson will join Kieger's coaching staff after being an assistant coach at the University of Miami.
Eziuka joins the No. 4 2026 class in the country, per 247 sports.
The game will take place on June 8 at Rate Field in Chicago.
This year marks the 55th year that Penn State will host the Summer Games.
The Nittany Lions will look to rebound after a disappointing season last year.