What are the roles and responsibilities of the Sponsor, CRO, and research site during study conduct?
The roles and responsibilities of the Sponsor, the CRO, and the research site during the conduct of a clinical or observational study are clearly defined by applicable regulations, ICH GCP guidelines, and the agreements governing cooperation between the parties. Proper definition and allocation of these responsibilities are critical for participant safety, data quality, and compliance with regulatory requirements. Although in practice these roles often complement one another, each party has distinct responsibilities and fulfills a different function throughout the study lifecycle.
The Sponsor is the entity that initiates, finances, and bears ultimate responsibility for the study. The Sponsor is responsible for study design, protocol development, ensuring compliance with applicable laws and regulations, and implementing a quality management system. The Sponsor selects research sites and investigators and, where necessary, delegates specific tasks to a CRO. Key Sponsor responsibilities also include oversight of participant safety, such as ongoing assessment of adverse events, reporting to competent authorities, and ensuring appropriate study insurance. Regardless of the extent of task delegation, full responsibility for the conduct and outcomes of the study always remains with the Sponsor.
The CRO (Contract Research Organization) operates under a contract with the Sponsor and assumes responsibility for selected operational, administrative, or regulatory tasks. The scope of the CRO’s responsibilities depends on the cooperation model and may include preparation of regulatory documentation, management of study applications in CTIS, site monitoring, data management, pharmacovigilance oversight, and coordination of communication with ethics committees. The CRO is responsible for performing assigned duties in accordance with ICH GCP, internal procedures, and contractual provisions, but it does not assume ultimate responsibility for the study, which remains with the Sponsor under applicable regulations. A key aspect of the CRO’s role is to ensure efficient study execution while maintaining high standards of quality and regulatory compliance.
The research site, represented by the Principal Investigator and the study team, is responsible for the practical clinical conduct of the study. Core responsibilities include identifying and qualifying participants, obtaining informed consent, performing study procedures in accordance with the protocol, and ensuring participant safety. The investigator is responsible for accurate and timely source documentation, reporting adverse events, and cooperating with the monitor and the broader study team. The site must also provide adequate facilities, equipment, and organizational support for study conduct and allow monitoring visits, audits, and inspections.
Effective collaboration between the Sponsor, CRO, and research site is based on a clear division of roles, efficient communication, and mutual trust. Poorly defined responsibilities or improper task delegation may lead to delays, GCP non-compliance, or risks to participant safety. Therefore, already at the study planning stage, it is essential to precisely define the scope of responsibilities of each party and formally document them in contracts and procedures.
If you want to ensure that roles and responsibilities in your study are clearly defined and aligned with current regulatory requirements, consider consulting our expert team. We can help structure the cooperation model, minimize operational risks, and support smooth study execution at every stage.
