Hosseini will be assisted by Hassan Estaki and Majid Mohafezatr in Zob Ahan.
He replaced Rahman Rezaei in the Isfahan-based football team.
Under coaching of Rezaei, Zob Ahan lost five of its 14 matches in the Iran Professional League (IPL) and dropped to 14th place, two points above the relegation zone.
Saket Elhami, Alireza Mansourian and Farhad Majidi were also the candidates to take charge of Zob Ahan.