Hamidaddin was appointed as CEO of the Saudi Tourism Authority in March 2020. He oversees the development and distribution of tourism offerings in collaboration with the tourism industry, as well as the Visit Saudi destination brand. In September 2022, the authority signed an MoU with UnionPay International to promote Saudi as a tourism destination among global Chinese travelers. Hamidaddin was previously chief of investment, strategy, and tourism marketing for the Saudi Ministry of Tourism and chief commercial officer at King Abdullah Economic City. He is also a member of the board of trustees of the Prince Mohammad bin Salman College for Business and Entrepreneurship and a board member of the Qiddiya Investment Company, the Saudi Conventions and Exhibitions General Authority, and several government committees.