Moontasir played for his school, college, Bombay University and the Maharashtra State, in turn. He made his international debut in an exhibition match against Australia in Mumbai in 1960. He represented India in the Quadrangular in Colombo in 1964 and captained the Indian side in the Asian Basketball Championship held in Bangkok in 1969 and 1975. Moontasir was also member of the Indian team that participated in the 1970 Asian Games in Bangkok and took part in the 10th Anniversary confederation Tournament in Manila. He was chosen for the Asian All-Star team in 1970.
Moontasir often clashed with the referees and officials and was even suspended on two occasions.
He received the Arjuna Award in 1970 for his achievement in national sport. He played his last national level match at the age of 44 when he represented the Railways in the Federation Cup in 1986. Mootasir also authored the book Principles of Basketball.