In the Pakistan Atomic Energy Commission (PAEC), Abdullah Sadiq, with among other Pakistani nuclear physicists, worked in a Nuclear Physics Division (NPD) at PINSTECH Department. Abdullah Sadiq was a keen researcher in the field of isotope technology, laser physics, optical physics, particle physics, and radiophysics. Abdullah Sadiq had also worked at neutron particle accelerator as a chief scientist. He has been a distinguished researcher at the PAEC where he worked with numerous physics research project there. In a physics event, he paid heavy tribute to PAEC chairman Munir Ahmad Khan and Ishfaq Ahmad, who also helped him to write his doctorate thesis.