Westat Inc. began as a partnership in 1961 with co-founders Edward C. Bryant, a
University of Wyoming statistics professor, and two former students, James Daley and Donald King. In 1963, the company was incorporated. Bryant served as the company's first president until 1978 when Joseph Hunt took over as president for the next 32 years. In 1978, the company established the Employee Stock Ownership Plan (ESOP), which allowed employees to own stock in the company. In 1981, Westat moved to its location in
Rockville, Maryland. In May 2011, James E. Smith, became president and CEO of the company. Graham Kalton, stepped down as chairman of the board in 2019, and was replaced by Smith. Scott Royal, became the CEO and President of the company in March 2020. In June 2023, Renee F. Slobasky succeeded Smith as board chair. On December 1, 2025 Westat moved to its current location in
Bethesda, Maryland.
Acquisitions Westat acquired Geostats, a research and technology company, in November 2012. and information technology solutions company Fenestra. Healthcare data analytics firm, JEN Associates, was acquired in February 2018. The acquisitions were for an undisclosed amount. In June 2022, the company acquired Insight Policy Research (Insight) which operates as a wholly owned subsidiary of Westat, known as 'Westat Insight'. ==Research activities==