Collins, 27, performed Tremendous Rugby for New Zealand sides Auckland Blues and Highlanders and can be a part of the Ospreys in the summertime.
The New Zealand Below-20 three quarter, who can play centre or fullback, performed within the Blues aspect that defeated the British and Irish Lions in 2017.
He beforehand featured for the Scarlets in his first stint in Welsh rugby.
Collins brings a wealth of expertise having captained Otago in Mitre10 Cup rugby and performed greater than 40 Tremendous Rugby video games for the Blues and Highlanders.
Throughout his time in New Zealand rugby, Collins has earned a popularity for being an clever footballer with real management qualities.
Collins qualifies for Wales by means of a Welsh grandfather.
He mentioned: “I spoke to Toby Sales space some time in the past and it is a completely different problem for me. It’s one I’ve tasted earlier than and he simply offered me on his plans for the workforce.
“The Ospreys are a fairly younger aspect in the intervening time and they’re a bunch who’re enhancing and that was simply an thrilling problem for me.
“Having watched them from afar this season, the Ospreys are taking part in fairly extravagant rugby and that’s thrilling too.
“I do have a Welsh qualification, however for me that is all about what I can do for the Ospreys, taking part in properly for the Ospreys, and making a contribution to the workforce.
“It’s all about including to the Ospreys atmosphere and taking part in my position in a set-up which is on the up.
“To return to an enhancing workforce the place there was some success, by way of Champions Cup qualification, is simply thrilling.
“Each participant desires to play at that sort of stage as a result of we’re all aggressive individuals and we wish to take a look at ourselves in opposition to one of the best elite gamers who play in that match.
“And with the PRO14 including the South African groups, sides I’ve performed in opposition to earlier than, it would simply add an entire new dynamic to that competitors.”
Ospreys head coach Sales space added: “Michael has a confirmed observe document in Tremendous Rugby and bringing excessive performing individuals from different environments brings a contemporary perspective and vitality which helps us develop.
“He has delivered prime quality performances in a mess of positions for Otago and the Highlanders.
“He additionally has expertise in Wales and has been a recognised chief on the pitch.
“All of those components mixed places us in a greater place as a squad to enhance.”