Dr. Callender has served as president and CEO of Memorial Hermann Health System since 2019, overseeing a network of 34,000 employees, 6,400 affiliated physicians and 250 care sites, including 17 hospitals. He has implemented a multi-year strategy to enhance patient outcomes, optimize costs, foster health equity and create fulfilling work environments. Under his leadership, Memorial Hermann has advanced high-value care through service line transformations, facility expansions and strategic investments, while partnering with community stakeholders to address healthcare access barriers. A tenured professor of otolaryngology, Dr. Callender has previously held leadership roles at The University of Texas Medical Branch in Galveston, the UCLA Hospital System in Los Angeles, and MD Anderson Cancer Center in Houston. Recognized in 2021 as one of Houston’s “Most Admired CEOs” by the Houston Business Journal, he continues to contribute to the community through board roles with The United Way of Greater Houston and the University of Houston.
