Parexel is among the world’s largest CROs, providing full range of Phase I to IV clinical development services to help life-saving treatments reach patients faster. Leveraging the breadth of our clinical, regulatory and therapeutic expertise, we collaborate with biopharmaceutical leaders, emerging innovators and sites to design and deliver clinical trials. We work With HeartTM every day to treat patients with dignity and learn from their experiences, so every trial makes a difference.