Category Team

Matthew Tatum, PsyD received his Doctorate in Clinical Psychology from Rosemead School of Psychology. Early in his career, he played a key role in helping develop two integrated behavioral health departments for Federally Qualified Health Centers in Fresno County. In…

Kevin Murray received a BA from Notre Dame and an MS from the National Intelligence University. Following his commissioning as an officer in the United States Air Force, Kevin served as a Flight Commander in the 566th Intelligence Operations Squadron…

Jeffrey McCusker Jankovic is the Chief Financial Officer of Tatum Psychology Employment Group and affiliated practices. He has 42 years of operations, accounting, finance, and board member experience and has been a CFO, for 13 years.  He has a Master…

Meet Alicia Alva, our dedicated Vice President of Operations, a distinguished figure in the field of behavioral health with a wealth of experience and expertise. Holding a Master’s degree in Marriage, Family, and Child Therapy, Alicia’s passion for enhancing mental…

Stephanie Patrick-Calvillo, MSN, PMHNP-BC is a Board Certified Psychiatric Mental Health Nurse Practitioner, with training and experience treating patients with psychiatric disorders across the lifespan and across practice environments; including inpatient and outpatient settings. Her education includes a Master of…

Jason Christopherson, PsyD, MSCP, ABPP earned his doctorate degree in clinical psychology from the California School of Professional Psychology at Alliant International University. He is the only Board Certified Child/Adolescent Clinical Psychologist in Central California.  Dr. Christopherson is a neuropsychologically…

Kelly Sisowath is a dedicated Program Manager at Ascend Behavioral Health, bringing a wealth of experience and expertise to her role. With a Master’s degree in Counseling Psychology, specializing in Marriage & Family Therapy, Kelly possesses a profound understanding of…

Tiffany graduated from UC Riverside and Fresno State. She came to Ascend with extensive clinical experience as a Program Manager at Valley Recovery Center working with clients in an intensive outpatient setting for several years. She is passionate about working…

Aaron Vargas has earned his Master of Arts in Educational Counseling from National University and a Bachelors in Criminology from CSU Fresno. Aaron comes to Ascend as an experienced Facility Manager for Short Term Residential Therapeutic Programs, where he has…