Steven is a graduate of Texas A&M University. He has served in many roles throughout his life, including his time as a high school counselor, owning and/or operating ranching and construction businesses, counseling management, and much more. In 2011, he began working as Program Director for a counseling agency in Oklahoma. In 2012, he opened Cornerstone Counseling Service.
Amy Foster, M.Ed.,Chief Operations Officer, HR Officer, Site Director, New Programs Consultant, Drug Testing Director, BHCM II
Amy is a graduate of Paris Junior College and Texas A&M University-Commerce. She graduated in August of 2023 with her masters degree in Clinical Mental Health Counseling from Lamar University. She served in Texas and Oklahoma as a teacher for many years. In 2009 while teaching in Oklahoma, she began working as a Behavioral Health Rehabilitation Specialist for a local counseling agency. In 2010, she left her teaching career and began working for them as Program Director of after-school programs. In 2012, she and her father, Steven Foster, opened Cornerstone Counseling Service where she has served as Chief Operations Officer, New Programs Consultant, Drug Testing Director, and as a Behavioral Health Case Manager. Amy is also certified in DOT and non-DOT Drug and Alcohol Testing, is a DOT Qualified Specimen Collector Trainer, as well as a Breath Alcohol Technician Instructor. She is currently serving as the Site Director for offices at Idabel and McAlester, OK, and Paris, TX.
Susan is the Site Director of Cornerstone Counseling Service. She is a Hugo native and a graduate of Southeastern Oklahoma State University with a Master's Degree in Elementary Education.
Cory has been with Cornerstone Counseling since the opening of the McAlester office in 2012. He serves as our Chief Financial Officer, as well as the Milan Trainer and the Private Insurance Representative. He is an asset to those he serves at Cornerstone.
Rea Mackenzie, Administrative Assistant, HR Officer, Medical Billing and Insurance Specialist, Site Director
Rea is the Administrative Assistant in Hugo, OK. She is also the HR Officer, the Medical Billing and Insurance Specialist, and a Site Director for the McAlester, OK office. When she isn't studying or working, Rea enjoys traveling with her two dogs, spending time with loved ones, or relaxing with a book. With over a decade of collective experience in customer service, sales, registration assistance and laying the foundation for business start-ups and filings, Cornerstone welcomes Rea Mackenzie to the team!
Sydney Miller, Administrative Assistant
Sydney is joining the Cornerstone Counseling Service LLC family as the new Administrative Assistant for the Idabel, OK location. She is Mom to one son, and spends her free time with her loved ones. Having spent over a decade in the customer service and sales industry, we are excited to welcome Sydney to our team.
