Al Hashar joined Bank Muscat in 2004. In 2021, the bank had assets worth $34 billion, compared to $32 billion in 2020. The company employs 3,850 people and serves two million customers across 174 branches. It facilitated over 86.5 million digital transactions worth a total of $50.4 billion and had over 1.5 million registered mobile and internet banking users as of December 2021. Al Hashar is also a board member of the Oman Banks Association, the College of Banking and Financial Studies, and the Securities and Investment Company (SICO) in Bahrain.