Edinburgh coach Frank Hadden will manage Scotland for the summer matches against the Barbarians and Romania.
Hadden has been in charge at Edinburgh for four years
The temporary manager will be assisted by Hugh Campbell (Glasgow), Steve Bates (Borders), Sean Lineen (Glasgow) and George Graham (Borders).
Alan Tait returns as specialist defence coach, while Todd Blackadder will act as a selection adviser.
A permanent replacement for the sacked Matt Williams will then be made for the autumn internationals and beyond.
And Hadden hopes to stake a claim for the job on a permanent basis.
He refused to criticise the period under Australian coach Williams.
But he stressed: "I am extremely proud to be asked to fill the role because at heart I am an out-and-out Scotland supporter.
"I have made the trips over the years to places like Dublin, Paris, Cardiff and Twickenham to yell my lungs out for the team and no-one in the world wants Scotland to win more than I do.
"Obviously all the coaches are on trial, but we regard it as a massive opportunity to stake a claim for the future.
"Without knowing I would be in this position, I have rehearsed in my mind all season what I might do if I were in charge of Scotland.
"My clear picture is that the game plan should fit the players, that they should buy into that game plan, be excited by it and give 110% for the blue jersey.
"Above all else, they must want to win for Scotland."
The interim group will be in charge against the Barbarians in Aberdeen on 24 May and Romania in Bucharest on 5 June.
SRU acting chief executive Fred McLeod said: "All the coaches from our three professional teams will be working together to put their vast rugby knowledge and insight of the Scottish psyche into delivering performances for Scotland of which the nation can be proud.
"We have chosen Frank as interim head coach because of his experience in the professional game and the fact that, over the piece, he is our most successful pro-team head coach.
"Hugh Campbell's track record at club, pro-team and international level, both with Scotland A and Scotland as a forward technician, is exemplary.
"And Steve Bates has impressed with his ability to get the best out of his players in a difficult first year at the Borders.
"George and Alan have made the successful transition from distinguished international rugby players to coaches who are making a difference in the professional arena, while Sean Lineen has proved his utter commitment to Scottish rugby, firstly as a Grand Slam player with Boroughmuir and Scotland then an innovative coach with Boroughmuir and now Glasgow."