Khan assumed his current position in 2023. AlRayan Investment, a wholly owned investment subsidiary of AlRayan Bank, had $1.4 billion in assets under management across Sharia-compliant equities, money markets, and sukuk in 2025. The firm's flagship AlRayan GCC Fund achieved a 10-year cumulative yield of 119.2% against a the S&P GCC Composite Shariah benchmark of 63%. In 2025, AlRayan Investment acted as joint lead manager on seven regional sukuk issuances, including the $3 billion State of Qatar sukuk. Khan previously held senior roles at Deutsche Bank in London.