Siddiqui has been the Group CEO of AHG since 2012. The group employs 650 people. RAK Hospital, the flagship brand of AHG, is present in 11 countries, including Ethiopia, Tanzania, Nigeria, Afghanistan, and Pakistan. In 2022, Siddiqui organized an equity contribution from the U.S.-based Dignity Health, which resulted in RAK Hospital being the first hospital outside the U.S. to be branded as a Dignity Group hospital. Siddiqui was previously the executive director at ETA Star Healthcare. He is also a board member at RAK Medical & Health Sciences University.