Sadiq was a close friend of Russian theoretical physicist Nikolay Bogolyubov. Sadiq also worked as the Rector of Ghulam Ishaq Khan Institute of Engineering Sciences and Technology in Topi, Pakistan. He retired in September 2007 and resided in his home town of Peshawar and focusing on his school in RextinKore. Recently, he moved to Islamabad where he joined Air University at Pakistan Air Force (PAF) as nuclear physicist and also teaching solid state physics and Condensed Matter Physics there. He is also serving as a dean of physics department Air University.