Our Staff


Diamond Jenkins

Diamond is a graduate of University of Phoenix and received her Masters in Counseling, Specialty in Mental Health. Diamond is a certified facilitator in the Duluth model for Batterer’s Intervention since 2019. She has extensive experience as a probation/parole agent as well as has experience in adult well-being services. Diamond has also worked as a youth counselor.

Nina Jackson MA, LPC, SCL

Nina Jackson is a Licensed Professional Counselor & Licensed School
Counselor.  Holding a Masters Degree in Counseling Education, and a
Bachelor’s Degree in Business Administration. She has over 20 years of
experience in the education and counseling fields. Having worked in
higher education as an Academic Advisor and Learning Specialist and as a K-12 Program Developer,  School Counselor, and  Mental Health Therapist. Nina owns a counseling consultant business and operates as the Executive Director of her nonprofit mentoring organization.

Ann L. Webster

Ann is a Licensed Professional Counselor, a Certified Advanced Alcohol and Drug Counselor and a Certified Clinical Supervisor. She holds a Master’s in Professional Counselling from Central Michigan University. Ann also has a Masters in Administrative Science from Saginaw Valley State University, a gradate certificate from Western Michigan University’s Special Program in Alcohol and Drug Abuse and a Bachelor’s degree in Criminal Justice from Ferris State University. Ann has 8 years of experience working as a substance abuse counselor in various settings including the Michigan Prison system, detox, short term and long term residential and outpatient with adolescent, families and adult clients.  Ann also has 4 years of experience working as a Clinical Supervisor with experience overseeing a program in the Michigan Prison system and currently as Program Supervisor of an Adolescent Outpatient program.

Sarah Claxton, MSW

Sarah is a graduate of Wayne State University and received her Master’s in Social Work. She also holds a Bachelor’s degree in Sociology from Grand Valley State University.  

Sarah has over 10 years of experience in serving various populations, resolving conflict and providing guidance for those in need. She has worked in clinical, hospital, non-profit and rehabilitation settings, working within the health and human services sector.

Sarah is a certified facilitator in the Duluth Model for Batterer’s Intervention since 2021. She is also ASIST (Applied Suicide Intervention Skills) certified and trained with the Suicide 2 Hope; Zero Suicide Initiative.

Margaret A. Costello, LLP

Margaret (“Peggy”) Costello is a psychologist (LLP) with more than 30 years of experience in the field of behavioral and cognitive psychology. An honors graduate of Penn State University, Ms. Costello holds master’s degrees in Rehabilitation from Southern Illinois University and in Clinical Psychology from the University of Michigan. She has worked in various settings, including rehabilitation facilities, private clinics and the Michigan prison system. In addition to her training and experience in psychology, Ms. Costello is an attorney, and has practiced law for 25 years. She currently is a law professor at the University of Detroit Mercy School of Law, where she was instrumental in establishing the nationally recognized Veterans Law Clinic.

Catherine A. Zoss, M.A., LPC

Katie Zoss is a graduate of Oakland University and received her Masters of Arts degree in 1994 and is a Licensed Professional Counselor (M.A., LPC.). She is also a Certified Advanced Alcohol and Drug Counselor (CAADC). She has over 25 years of experience in the criminal justice system working as a classification agent, a deputy in the jail, a probation officer and as a group facilitator for court ordered programs.


Bryan Weinstein, D.O.

Medical Director / CEO

Dr Bryan Weinstein is a practicing psychiatrist with board certification from the American Board of Psychiatry and Neurology. He has been board certified since 1999 and has been practicing psychiatric pharmacology as well as psychotherapy since 1997.

Dr Weinstein has extensive knowledge in the fields of chronic pain, traumatic brain injury, psychopharmacology and general psychiatry. Dr Weinstein received both his undergraduate, and Osteopathic Medical Degree at Michigan State University. He attended the residency programs of Detroit Psychiatric Institute and Wayne State University and received a mini fellowship in electroconvulsive therapy at Duke University.

Dr Weinstein is a successful lecturer for a number of pharmaceutical companies including Forest, Wyeth-Ayerst, GlaxoSmithKline, Cephalon, and Takeda pharmaceuticals. He is a member of the Osteopathic Medical Society, the Psychoanalytic Society and the Brain Injury Association of Michigan.

Dr Weinstein currently owns and practices in two private psychiatric clinics. Additionally, he has founded and operates Advanced Behavioral Rehabilitation LLC, which provides behavioral treatment for people involved in the judicial system, as well as Peak Pharmacy. He is an avid sportsman and musician as well as a loving husband and father of 3 children.

Michelle Cantea


Michelle Cantea has worked for ABR for 12 years. She started with ABR as a full-time Intern while attending Wayne State University as a full-time student; where she received her Bachelor of Arts degree in Psychology and her minor in Criminal Justice. Michelle’s passion and zeal for helping probationers transform their lives aided in her quick rise to a managerial position with ABR. Michelle is an integral part of the ABR team. She is currently the Director of Operations where she oversees the financials, administration and daily operations of the company. She also serves as a Court Liaison.

Building Insight. Improving Lives.

One step at a time