During his tenure as president and CEO of Memorial Hermann Health System, Dr. Callender led the organization through a period of transformation. In 2021, Memorial Hermann began the evolution to a service line operating model, which led to standardizing the processes across its many hospitals and clinics. This helped to optimize individual care for each patient through their entire hospital and recovery time. He was named to Houston Business Journal’s “Most Admired CEOs” list in 2021. He also sits on the board of directors for the American Heart Association-Houston and United Way of Greater Houston.
