Chilwan assumed his current position in 2013. In H1 2025, DIB reported $1.7 billion in operating revenues and its total assets amounted to $101.7 billion and its Gross Underwriting and Sukuk Investments exceeded $16.3 billion, a 47% increase year-on-year. Chilwan serves on the boards of Noor Bank, Deyaar, Liquidity Management Centre, and the International Islamic Financial Market.