He was in Shahin until the club's dissolution in 1966. Then he signed a contract with Persepolis F.C. and became head coach of club. He was the second manager of Persepolis and caused that Shahin F.C. players move to Persepolis. He became head coach of Homa F.C. in 1969 after leaves Persepolis. He win Takhte Jamshid Cup for two times with Homa. After his good results in Homa, he was appointed as Head coach of National football team in 1971. He coached team in Olympic Games in Munich, the team was able to successfully deliver the Olympic competition. But resigned before the tournament. He Resigned because of differences he had with his assistant, Mohammad Ranjbar. He was re-appointed as head coach of national team in 1986. He led team melli in 1986 Asian Games and 1988 AFC Asian Cup. Team Melli became third place in 1988 Asian Cup and Dehdari was sacked by Islamic Republic of Iran Football Federation on 22 January 1989.
He was among those who knew that the ethics of sports were driven by the mood of the people who would exercise his morals teaching. He was married in 1957, he and his wife had two sons. In April 2002 his wife, Mahnaz,died of lung cancer.
He died on November 23, 1992 as a result of Kidney disease at his home. Each year a ceremony is held in Abadan in his honor. Today, he is called the Comportment schema. A street behind Takhti Stadium has been named after Parviz Dehdari.