Cyclones assistant Charlie Henry follows Hoiberg to the Chicago Bulls

Everyone figured Charlie Henry would eventually follow Fred Hoiberg to the Chicago Bulls.

It officially happened on Thursday.

He resigned as an Iowa State assistant. He starts work for the Bulls on Monday.

"The three years I was (at Iowa State), they were unbelievable," Henry said in a phone interview. "From a team standpoint and all the success we had, to working with Fred, and then on a personal level being around the fans and the great community — I can't thank everybody enough."

Henry did not want to say what his role with the Bulls would be. "I'll let them release that," he said.

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Two full-time Hoiberg assistant coaches remain on the Cyclones staff — T.J. Otzelberger and Cornell Mann.

Otzelberger was one of seven interviewed for the head coaching position that went to former Murray State coach Steve Prohm.

Prohm is expected to retain at least one. Tuesday, he announced on CBSSports.com that William Small, a Murray State assistant, was following him to Iowa State.

Henry was an Iowa State graduate assistant and director of player development before replacing Doc Sadler as a full-time assistant in 2014.

He was video coordinator for the Indiana Pacers in 2011-12.