He also coached at Lehigh University and as an assistant with the Sacramento Kings in the National Basketball Association (NBA).

Four years later, in 1958, Carril was named the varsity coach at Reading Senior High School in Reading, Pennsylvania, where Gary Walters, the former Princeton Tigers athletic director and earlier Princeton basketball point guard played basketball under him at Liberty High School.

[8] He won or shared 13 Ivy League championships and received 11 NCAA tournament berths and 2 NIT bids.

[10] Partly due to these factors, while his Tigers only won three NCAA Tournament games, they were known as a very dangerous first-round opponent;[11][12] seven of their first round losses were by fewer than ten points.

[15][16] Carill's career collegiate coaching record, including one season at Lehigh University in Bethlehem, Pennsylvania, was 525–273.

[17] Carril was an assistant coach for the Sacramento Kings of the National Basketball Association for 10 years until his retirement in 2006.

During his tenure, the Kings were noted for their quick-passing offense, as well as their ability to stymie double teaming attempts from their opponents.

[2] Carril suffered a heart attack in 2000, which spurred him to quit smoking Macanudo cigars.