Nasrallah joined DASH in 2004 and became CEO in 2011, leading a team of over 2,000 people from over 40 nationalities. In 2022, DASH became the first hospital to attain People Centered Care Commitment Award in collaboration with Accreditation Canada. In the same year, DASH attained HIMSS level 7 certification. Nasrallah has 25 years of experience in the healthcare sector. He was previously COO at DASH.