From chicagoblackhawks.com: (link)

The Chicago Blackhawks announced today that Rick Dudley has resigned as assistant general manager, effective immediately.

“Rick has informed me that he has resigned from his position with the Blackhawks to pursue other opportunities,” General Manager Dale Tallon said. “I would like to extend my gratitude to him for his work with our organization and certainly wish him well in the future.”

Dudley served four years in the Blackhawks hockey operations, which includes each of the last three as the club’s assistant general manager.