He joins Al-Shabab after leaving his position as coach of Real Sociedad at the end of last season.
Although there were expectations that Imanol would stay with Real Sociedad, he announced his decision to leave in the final month of the season.
Imanol has signed a two-year contract with Al-Shabab, marking the end of his seven-year tenure as coach of La Real.
He takes over from former coach Fatih Terim and will work alongside experienced player Yannick Carrasco at Al-Shabab.