By Celeste Percy-Beauregard, Local Journalism Initiative Reporter, The Hamilton Spectator The midday sun streams through the window of Matt Jamieson’s Six Nations office. At his desk, he’s surrounded by Indigenous artwork and family photos. The roulette tables and slot machines that once fuelled him might as well be a million miles away — but he carries a piece of that past with him. Before he became CEO of Six Nations of the Grand River Development Corporation (SNGRDC), Jamieson was climbing the corporate ladder, helping casino enterprises rake in profits. “It wasn’t until I was out that I actually … reflected on the things that I did and the damage that it caused. Because that industry doesn’t really create value — it diminishes value, right?” In 2009, he came home to…