This morning, the Senators announced the addition of Rob Cookson to the coaching staff in the role of assistant coach.
Cookson comes with a certain familiarity to the rest of the coaching staff. Most recently, he has served as an assistant in the 2015 Spengler Cup for Team Canada under Guy Boucher, and with the Swiss League's ZSC Lions for four years under Marc Crawford. He was also part of Crawford's video coaching staff for Team Canada way back in 1998.
As for NHL experience, Cookson spent a decade as an assistant coach with the Calgary Flames from 01-02 through 10-11, and he spent three years as the video coach for the Philadelphia Flyers before that.