رأس تنورة
Al Othman worked in Saudi Aramco where he had over 30 years of experience in planning and managing oil and gas projects. He began his career in Saudi Aramco in March 1981 as an engineer serving in the engineering and project management. Later in the 1980s, he served as an engineer in several projects, such as the gas gathering project (Phase II), the Ras Tanura refinery modernization project, the Qasim refinery project, the southwest refinery project, and the Ras Tanura and terminal projects.