 At PAEC, he became a mentor to some of the country's academic scientists.At PAEC, he was the director of the Mathematical Physics Group (MPG) and was tasked with performing mathematical calculations involved in nuclear fission and supercomputing.While both MPG and Theoretical Physics Group (TPG) had reported directly to Abdus Salam, Siddiqui co-ordinated each meeting with the scientists of TPG and mathematicians of the MPG.