Al-Hajji joined PIC, a subsidiary of the Kuwait Petroleum Corporation, in 2019 and assumed her current role in 2022. PIC recorded a net profit of $127 million in the financial year ending March 2024. Al-Hajji is also the chairman of the EQUATE Group and the Kuwait Olefins Company. She is a board member at the Canada Kuwait Petrochemicals Company, and a board member and treasurer at the Gulf Petrochemicals and Chemicals Association. She is also head of the Diversity and Inclusion Council at the Kuwait Petroleum Company and its subsidiaries, among other roles.