With 85 caps to his name, he's Scotland's most capped scrum-half and will be returning to Scotland three years after leaving Edinburgh Rugby for Brive.
Following a year in France, he joined Newcastle Falcons and has gone on to play 39 times for the Aviva Premiership side.
He captained Scotland on 14 occasions before retiring from international rugby at the start of 2013 and has played in three Rugby World Cup's during his career. He was also part of the 2009 British and Irish Lions squad, which toured South Africa.
The 33-year-old was named Scotland's Player of the Year in 2008 and is the only Scotsman to have ever been nominated for the IRB International Player of the Year, that same season.
Mike enjoyed ten years with Edinburgh Rugby, playing 158 times and scoring 78 points. He was twice named Edinburgh's Player of the Year and helped them reach the semi-finals of the European Cup in 2012.
Commenting on the move, Mike said: "I'm very excited about moving back to Scotland and joining a very ambitious club.
"One of the reasons I'm moving to Glasgow is the opportunity to work with Gregor (Townsend) again. I played with him when I started out with Scotland and he coached me when he was part of the Scotland set-up and that was definitely a big factor in my decision to join the Warriors. My aim is to move into coaching and I see Gregor as being a great role model.
"Part of my role will be to help the younger guys develop and it will be good to work closely with the other scrum-halves at the club such as Henry (Pyrgos) and Grayson (Hart).
"I had opportunities to stay in England, but I want to make a further contribution to the game in Scotland and eventually make the transition into coaching.
"I'm looking forward to playing in the GUINNESS PRO12 again next season and I think the style of rugby will really suit my game.”
Glasgow head coach Gregor Townsend said: "It's great news for the club that Mike will be joining us in the summer.
"He has been in excellent form and has started most of Newcastle's games this season.
"They've been playing a high-tempo attacking game, which brings out the best in Mike and is similar to the rugby we play at Glasgow.
"Mike's experience and knowledge of the game will be really valuable for our playing and coaching group and I'm certain our other scrum-halves will benefit from his input.
"We expect Mike to compete hard for a starting place with our other nines next season and in addition bring a wealth of experience and knowledge to the club."