Diana L. Knaebe, MSW, serves as the President and Chief Executive Officer of The Brien Center for Mental Health and Substance Use Services. Appointed on July 1, 2024, she has over 35 years of experience in the behavioral healthcare sector, having held leadership roles in both nonprofit and governmental organizations. Her previous positions include President of Memorial Behavioral Health and System Administrator of Behavioral Health at Memorial Health System in Springfield, Illinois, as well as State Director of the Illinois Division of Mental Health and President/CEO of Heritage Behavioral Health Center in Decatur, Illinois. Knaebe began her career as a therapist in Michigan, where she and the organizations she led received numerous state and national awards for excellence in behavioral health. Knaebe holds a Bachelor of Arts in Psychology from San Diego State University and a Master of Social Work degree from Western Michigan University.