Al Hashar joined Bank Muscat in 2004 and was appointed to his role in 2019. The bank has a network of 179 branches across Oman, with more than 2.4 million customers, and employed 4,100 people, as of September 2023. It posted a net profit of $412.8 million for the first nine months of 2023. Al Hashar has over 30 years of experience in banking and the oil and gas sectors. Before joining Bank Muscat, he held senior positions in Petroleum Development Oman and HSBC Bank Middle East.