Meet the Great Plains Recovery Team

Dr. Van Doren is an Addiction Medicine and Chronic Pain Specialist at Advanced Pain of Tulsa. He received his B.S. degrees in Chemistry and Biology at Newman College in Wichita, Kansas and his M.D. degree from the University of Kansas School of Medicine in Kansas City, Kansas. Dr. Van Doren completed his Internal Medicine Residency and Fellowships in Medical Oncology and Hematology at the University of Oklahoma Health Sciences Center in Oklahoma City, OK. He worked for over 15 years as a Medical Oncologist & Hematologist in private practice in Oklahoma before pursuing a Fellowship in Addiction Medicine at the University of Oklahoma School of Community Medicine.

He remained as a Faculty Assistant Professor of Internal Medicine at the University of Oklahoma providing and teaching Addiction Medicine and non-interventional chronic pain management. Dr. Van Doren moved into private practice in July of 2016 where he has worked to develop Addiction Medicine programs and provide non-interventional chronic pain management through Pain Management specialty practices.

He was a previous Medical Director for the Mission Treatment Center and is the current Medical Director for the Tulsa Comprehensive Treatment Center. Dr. Van Doren is Board Certified and maintains certification in Internal Medicine through the American Board of Internal Medicine, Addiction Medicine through the American Board of Preventive Medicine, and as a Medical Review Officer through the American Association of Medical Review Officers. He is an active member of the American Medical Association, American College of Physicians, American Association of Medical Review Officers, and is a Fellow of the American Society of Addiction Medicine.

LaWanda Singleton brings over 12 years of experience in the Health Information Management field. She currently serves as the Human Resource Manager, Health Information Management, Credentialing, and HIPAA/Compliance Officer at Great Plains Recovery Center, a Drug and Alcohol Recovery Center dedicated to restoring hope, healing families, and rehabilitating futures. In this role, LaWanda leads human resources operations and ensures rigorous compliance with regulatory standards. Additionally, LaWanda implements policies and procedures for the preparation, maintenance, completion, privacy, and retention of medical records. LaWanda is a dedicated mother of five and holds four degrees in Health Information disciplines.

Ruby Thomas APRN-CNP is a nationally certified Adult Gerontology Primary Care Nurse Practitioner who is specialized in addiction treatment through SAMSHA. She received her Bachelor’s degrees from Oklahoma Wesleyan University and her Master’s degree from the University of Cincinnati. She is a member of the ANCC.  She has over 10 years’ experience with substance abuse, particularly in Opioid Use Disorder. She has been practicing in Tulsa for over 25 years and besides being an NP , she has served in various roles including ER , ICU and several management positions. When she is not at work, she enjoys to spend time with her family and volunteers at community events. She is married and has a daughter that is a physician and a son that is studying to be a CRNA.

Michael Foust serves as Executive Director of Great Plains Recovery, bringing extensive leadership experience in behavioral health and healthcare operations. Prior to joining Great Plains Recovery in late 2025, he served as Chief Administrative Officer for Avita Partners in Flowery Branch, Georgia, and Chief Executive Officer of the Guidance Center of Lea County in Hobbs, New Mexico.

A native of Durham, North Carolina, Michael is a graduate of East Carolina University, where he earned his Master of Social Work, and he is a Licensed Clinical Social Worker. Throughout his career, he has been committed to advancing access to quality behavioral healthcare, organizational excellence, and community impact. Michael is passionate about social justice and creating a world where all people have the opportunity to thrive.

Rhonda serves as Clinical Director at Great Plains Recovery Center and brings 27 years of experience as a substance use and mental health therapist. She earned a Master of Science in Counseling and Human Resource Development from South Dakota State University and is a Licensed Professional Counselor (LPC), Licensed Alcohol and Drug Counselor (LADC), and Board-Approved Supervisor in Oklahoma.

Rhonda’s experience includes residential and outpatient treatment, crisis services, private practice, clinical training, and program leadership. Drawing from more than 29 years of personal recovery, she combines professional expertise with lived experience to support those seeking lasting change. Rhonda’s purpose is to help individuals achieve lasting recovery by fostering hope, wellness, and personal growth.

Anthony Casian is a behavioral health professional with more than 14 years of experience serving adults and children in psychiatric, behavioral health, and substance use treatment settings. As Behavioral Health Technician Supervisor at Great Plains Recovery, he provides leadership, staff development, and operational oversight while promoting a safe, supportive, and recovery-focused environment. His experience includes crisis intervention, behavioral stabilization, patient advocacy, and collaboration with multidisciplinary treatment teams to support positive client outcomes.

Known for his calm leadership style and strong communication skills, Anthony is dedicated to fostering accountability, compassionate care, and professional excellence. His purpose is to help individuals achieve stability and long-term recovery while empowering staff to deliver exceptional behavioral health services.

Ginger serves as Nurse Manager at Great Plains Recovery, bringing more than four decades of nursing experience and healthcare leadership to the organization. Prior to joining Great Plains Recovery in March 2025, she served as Nurse Manager at Claremore Regional Hospital in Claremore, Oklahoma, where she provided clinical oversight and support to both patients and staff. A native of Oologah, Oklahoma, Ginger earned her nursing degree from Rogers State College and has been a Registered Nurse since 1984.

Throughout her career, she has remained committed to delivering high-quality patient care, fostering professional excellence, and supporting positive health outcomes. Ginger is passionate about caring for others and helping individuals achieve lasting wellness, stability, and recovery.

Brandie Herren serves as a nurse manager at Great Plains Recovery, bringing more than 20 years of behavioral healthcare experience and over a decade of nursing leadership and administrative expertise. Specializing in addiction medicine, she is dedicated to delivering compassionate, evidence-based care that supports individuals throughout their recovery journey.

Throughout her career, Brandie has focused on improving patient outcomes, leading multidisciplinary teams, and promoting excellence in behavioral health services. Her leadership approach emphasizes collaboration, clinical quality, and a patient-centered culture of care. Brandie is passionate about helping individuals achieve lasting recovery while supporting healthcare professionals in providing exceptional treatment and service.

Jill Galloway serves as Alumni Coordinator at Great Plains Recovery, where she is dedicated to helping clients remain connected to recovery after treatment. In her role, she provides ongoing support, coordinates alumni engagement, connects graduates with community resources, and works to strengthen long term recovery through meaningful relationships, continued encouragement, and community.

Originally from Washington State, Jill earned her Bachelor’s degree from Warner Pacific University in Portland, Oregon and is currently pursuing her Master’s degree in Mental Health at Cameron University in Lawton, Oklahoma. She has experience in behavioral health, case management, housing services, and recovery support, serving individuals with substance use and mental health challenges throughout Oklahoma.

Jill is passionate about helping people build stable, healthy lives in recovery and believes that lasting success is strengthened through connection, hope, and a strong support network.