Derek McInnes is the new manager of St Johnstone, with the 36-year-old agreeing a two-and-a-half year contract at McDiarmid Park.
McInnes will take his first steps into management at McDiarmid Park
The Perth club are replacing Owen Coyle and his assistant Sandy Stewart after the pair moved on to Burnley.
"You normally get a job when a team has been struggling but there's not a lot wrong here," McInnes told BBC Sport.
"There are a lot of good boys here but there is room for improvement and we need to mount a promotion challenge."
St Johnstone are 12 points behind First Division leaders Hamilton Academicals but have a game in hand.
"We have had too many draws," added McInnes. "We need to start winning games and build a bit of momentum.
"We pulled back a similar deficit last year and got very close, so I'm sure we can get back up there."
Former Morton, Rangers and Dundee United midfielder McInnes moved to St Johnstone from Millwall 10 months ago.
McInnes, who had been coaching the reserves and under 19s, was approached by Clyde earlier this season.
However, he ruled himself out of the running for the post after being interviewed by the Cumbernauld club.
McInnes said that he was reluctant to carry on playing but would continue to be available for the first team.
"The player-manager role is difficult task," he added.
"We have guys coming back from injury and one or two youngsters who are ready to step up, so we are well covered in midfield.
"If that means me not playing, so be it. I'll do what's best for the team."
Stewart was in charge of Saints for Sunday's 3-2 Challenge Cup final win over Dunfermline.
After the victory he had indicated he would be interested in succeeding Coyle but, on Monday, decided to follow his boss to Turf Moor.
"It's the hardest decision of my footballing career," Stewart told the club website.
"The opportunity to work down south to help Owen try to take Burnley into the Premiership is just too great."
"Who knows, maybe in two or three years time I'll look back and regret the decision but that is the chance you take and I know that I'll regret it if I don't take the opportunity to try it out."