Osmnlıspor, currently playing in Turkey’s Süper Lig, was founded as "Ankara Belediye Spor Kulübü" (Ankara Municipality Sport Club) in 1978.
The 25-year-old midfielder has joined Osmanlıspor on a one-year contract for an undisclosed fee.
Sadeghian was on the verge of joining Iranian club Sepidrood Rasht but changed his mind and penned a contract with the Turkish club.
Payam Sadeghian has made five appearances for Iran national football team and scored one goal.