The 38-year-old native of Regina moves into the position after a 17-year playing career.
"We are very excited to have Mike fill such an important role with us," said Oilers GM Steve Tambellini. "We know his experience of 1,000-plus NHL games will benefit our younger players and the development of their careers."
Sillinger has played for 12 NHL teams, most recently suiting up for the New York Islanders last season.
I feel that responsibility, I've felt it for the last two years. We core guys get a lot of minutes, we get a lot of opportunity out there. Our teammates, the organization and fans look to us to be the guys to put the puck in the net and to create momentum out there.
— Jordan Eberle on taking his game and the Edmonton Oilers to the next level