Dehghan served as a commander in the Iranian Revolution Guards Corps and in its air force. He left his hometown for Tehran and joined the IRGC shortly after the Iranian revolution in 1979. His posts at the IRGC include commander of IRGC of Tehran, Isfahan, and Syria and Lebanon, and general manager of the IRGC's Cooperatives Foundation. During the Iran-Iraq war, he was among leading and decision-making commanders of the IRGC along with Mohsen Rezaee, Rahim Safavi and Ali Shamkhani. In Syria and Lebanon he was the commander of the training corps of the IRGC. He was named the IRGC's air force deputy commander in 1986 and became its commander in April 1990. His tenure lasted until 1992 and he was replaced by Mohammad Hossein Jalali in the post. Dehghan was named deputy chief of the IRGC Joint Staff in 1992. He later was promoted to the rank of brigadier general. n Defense MinisterSergey Shoygu, 16 February 2016 Next he served as deputy to the then defense minister, Ali Shamkhani, during the presidency of Mohammad Khatami from 1997 to 2003. In 2003, he held the post of acting defense minister. He was made Vice President of Iran and head of the martyrs foundation, "Bonyad Shahid", in 2005 and served as its president until July 2009. In addition, he served as an advisor to the former President Mahmoud Ahmedinejad. From 2009 to 2010 he was the deputy to Ali Shamkhani in the Armed ForcesStrategic Studies Center. Then he was appointed secretary of the Expediency Council's political, defense and security committee in 2010. He also served as an advisor to Speaker of ParliamentAli Larijani and Tehran Mayor Mohammad Bagher Qalibaf. However, Dehghan distanced himself from Ahmedinejad in 2012 and joined Moderation and Development Party led by Hassan Rouhani. He was nominated to head the defense ministry on 4 August 2013. He was approved by the Majlis and replaced Ahmad Vahidi in the post. Dehghan received 269 votes in favor and 10 votes against. Former Oil MinisterRostam Qasemi was named as Dehghan's advisor on 22 August. On 1 August 2017, Dehghan announced that he will leave defence ministry after the end of the first Rouhani government. He currently serves as an advisor to Supreme Leader Ayatollah Ali Khamenei.