Research Services International

Research Services International (RSI) is a multi-therapeutic clinical research site and service provider based in Zephyrhills, Florida. Founded in 1992, the company specializes in conducting Phase I through IV clinical trials across a broad spectrum of therapeutic areas, including cardiology, endocrinology, pulmonology, and rheumatology. RSI is recognized for its high-quality data management and robust patient recruitment capabilities, serving as a key partner for major pharmaceutical companies and global contract research organizations. In July 2021, the company was acquired by Velocity Clinical Research, a leading integrated site organization, to enhance its clinical trial footprint in the Southeastern United States.