PAREXEL provides the most comprehensive drug development capabilities of any contract research organisation (CRO) worldwide. For over 35 years we have helped our sponsors get their new and innovative drug treatments into the hands that need them most by simplifying their journey to market. Today that means going above and beyond - at every step along the way.
Our global clinical, regulatory, and commercial expertise, data science and knowledge engineering capabilities, Phases I to IV clinical research services, and integrated eClinical technologies work together to move you through the development journey more smoothly and cost-effectively from beginning to end. Headquartered near Boston, Massachusetts, PAREXEL operates in 84 locations with approximately 17,510 employees in 41 countries worldwide.

Our goal at PAREXEL is to ensure that our medical, clinical, and scientific expertise is made available for every project we undertake on behalf of sponsors, whether large or small.
To achieve this commitment, PAREXEL has Medical and Scientific Therapeutic Area Teams providing a single point of contact for sponsors to more quickly access our comprehensive worldwide expertise, aligning PAREXEL’s leading medical, therapeutic area, regulatory and clinical operations experts with their counterparts at biopharmaceutical companies. This provides sponsors with access to a global team of specialists who can work closely with them to deliver a new level of strategic collaboration based on programme design expertise, operational excellence, and project leadership. PAREXEL offers a wealth of experience conducting clinical trials, across the full spectrum of global services for Phases I-IV studies from protocol development, site initiation and monitoring, data management, project management, and statistical analysis through to report writing and regulatory submission.
This global experience and world class expertise provides our sponsors with strategic and practical solutions for their clinical drug development. Our teams also have an in-depth understanding of the competitive environment and global and regional standards of care for specific indications and lines of therapy. They apply lessons learned from the development of similar agents, including provision of proactive solutions to potential issues. Our project teams are assembled on the basis of recent and relevant experience with specific indications, familiarity with the class of investigational agents and their mechanisms of action, the phase of study, the type of investigative sites, and knowledge of the key opinion leaders in the field.
The Medical and Scientific Therapeutic Area Teams are also responsible for project team training in a wide range of relevant topics including study design across different phases of development, biology and epidemiology, diagnosis, and treatment of specific disease indications. Our training has been so useful to our sponsors that several of them have used PAREXEL’s experts to train their own staff.
Over the past five years, PAREXEL has provided clinical project services (including technology) for more than 14,200 projects, which have to date collectively enrolled more than 3.5 million subjects. Projects have ranged across the spectrum of clinical phases, with experience across all major therapeutic areas and many indications.