Ron Sutter is head of player development.
Not sure what that includes though - including who is ultimately responsible for player development for the players on the main roster.
EDIT: Actually that might be wrong as Ray Edwards is listed as the director of player development.
Assistant General Manager: Craig Conroy
Assistant General Manager: Brad Pascall
Assistant General Manager: Chris Snow
Senior VP, Hockey Operations: Don Maloney
Director, Hockey Administration: Mike Burke
Director, Pro Personnel: Derek MacKinnon
Director, Player Development: Ray Edwards
Player Development: Ron Sutter
Player Assistance: Brian McGrattan
Director, Amateur Scouting: Tod Button
Asst. Directors of Amateur Scouting: Rob Sumner, Fred Parker
Director, Team Operations: Sean O'Brien
Database Architect and Analyst: David Johnson
Head Coach: Geoff Ward
Sigh. They also apparently don't update their web site regularly.
https://www.nhl.com/flames/team/staff-directory