Coleman was sacked as manager of Fulham in April

Coleman, 37, signed a three-year deal on Wednesday after the Basque club approved a new board led by president Maria De La Pena.

Coleman, who was sacked as Fulham boss in April, will be presented to the media on Thursday.

Sociedad were relegated from La Liga last season for the first time in 40 years, finishing 19th out of 20.

There are some items to iron out - not financial but technical Coleman's agent Alan Smith

"He brings freshness and new ideas and the main aim will clearly be to return to the Primera Liga," said De La Pena.

Coleman was recommended to De La Pena and Sociedad by their former manager John Toshack.

The club's former coach Salva Iriarte will work alongside Coleman after being given the post of sporting director.

Iriarte had been Toshack's assistant with Wales since November 2004 but has been forced to relinquish the role, despite originally hoping to combine both jobs.

Former Wales striker Dean Saunders has taken over as Toshack's number two.

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Coleman joined Fulham as a player in 1997 in a �2m move from Blackburn but injuries suffered in a car crash in 2001 led to his retirement less then two years later.

He took over as manager in April 2003 following the departure of Jean Tigana.

Coleman was eventually replaced by Lawrie Sanchez, paying the price for a seven-game winless streak that left the club hovering above the Premier League relegation zone.