Harb assumed his current position in 2022. Established in 1975, Dar Al Dawa has seven production plants manufacturing more than 200 products across over 40 markets with 1,000 employees. In November 2024, the firm obtained an official license to establish a pharmaceutical manufacturing facility in Saudi Arabia. In the first quarter of 2025, the company’s profits grew 19%, with revenues up 10%, driven by 68% growth in Iraq and Levant markets. Harb serves as the Vice Chairman of the Jordanian Association of Pharmaceutical Manufacturers and sits on the boards of Nutridar and DADvet.