Meet Our Dedicated Team
Cornerstone prides itself on being a family-run, community-focused business. Understanding the importance of community means we truly understand the importance of quality staff, for these people form the heart, the cornerstone of our community. As such, we aim to offer outstanding employee benefits to our staff, as we know we get back what we put in.
Cornerstone is proud to boast a team of the most highly skilled experts in the Substance Use and addictions field. Our staff are all fully trained in treating chemical dependency and related addictions. We also employ many people with experience of substance use disorders or addiction themselves, as we understand that those who have been through the recovery process are well equipped to help another recovering addict get to where they are. We are exceptionally proud of our 90 employees and affiliates.
Over the years we have attracted some of the most senior members of Orange County’s medical and psychological team. Many wanting to work for us because of our exceptional working conditions, camaraderie and sense of community.
Michael Stone, MD, FAAFP, ABAM, FASAMFounder and President
Malcolm John Wehrle, MD
Dr. Wehrle is a Diplomat of the American Board of Anesthesiology and of the American Board of Addiction Medicine. He is a graduate of the USC School of Medicine and completed his internship and residency at Los Angeles County USC Medical Center. Dr. Wehrle is a member of the California Societies of Addiction Medicine and Anesthesiology as well as the American Society of Addiction Medicine and Anesthesiology.
Dr. Wehrle has extensive experience in the substance abuse and addictions fields having worked in addiction treatment since 1991. Throughout his career he has treated thousands of patients with poly-substance abuse and co-existing disorders needing pain management and pre-operative, intra-operative and post-anesthesia care.
In addition, he has worked as an expert Anesthesia witness in over 50 medical malpractice plaintiff and defense cases.
Dr. Wehrle is happily married to Mrs. Jacqueline Wehrle and is the proud father of four sons.
Jessica StoneCo-founder Executive Assistant
Since Cornerstone’s inception, Jessica Stone has been an integral component of the family business. Co-founding it in 1984 with Michael, she has tirelessly dedicated her life to the improvement of recovery outcomes for thousands of addicts.
Born in India, she grew up in the UK where she met and married Dr. Stone in 1967.
Jessica is extremely proud of her three children, Simon, Samantha and Tim, who have also dedicated their lives to Cornerstone and the treatment of addictive disorders. Like her husband, she is a doting grandmother of her five grandchildren.
Phil KosanovichChief Executive Officer
Samantha Stone, BAPresident
Samantha graduated from California State University, Fullerton, with a BA in psychology and a BA in sociology. She has been with Cornerstone since its conception in 1984. Her main role at Cornerstone has been to coordinate all of our client admissions. If you need assistance in checking your insurance benefits or learning more about Cornerstone’s programs, do not hesitate to give Sam a call.
Sam, like her mom, loves all animals and currently has a cute little dog named Henri. She loves sushi, road-biking, going to the movies and traveling. Sam is also a triathlete.
Simon A. Stone, BA, JDSenior Vice President, Safety Officer, Corporate Business Development and Court Liason
Alongside his duties as Senior Vice President of the company, Simon acts as Cornerstone’s Safety Officer. His main role addresses continuous quality improvement and management of the Cornerstone estate. He ensures that the property is continuously well managed and that the facilities are up-to-date, comfortable and safe for our many clients, staff, and visitors.
Simon also assists in our Alternative Sentencing Program, where he passionately advocates for treatment in lieu of jail time in conjunction with criminal defense attorneys, public defenders, district attorneys, judges, and commissioners.
He enjoys surfing, traveling in his “sports mobile” and raising his four beautiful children, four turtles, five fish, one dog, one cat, and one hamster, always with the constant support of his wife, Kari.
Timothy Stone, BASenior Vice President
Tim Stone has officially worked at Cornerstone since 1999, although he has grown up within the company and it has always been a part of his life. Professionally he has also grown up inside the company, starting out as a maintenance man cleaning the pools and helping around the houses, he now runs and cares for over 20 recovery homes, ensuring they are in compliance with the California Department of Alcohol and Drug program regulations.
Tim enjoys surfing, trying new restaurants, and taking care of his two dogs and two cats.
Tami K. Campbell, CADC-CASDirector of Operations
Anya Chernitskaya, BSHS, CADC-CASSr. Intake Manager
Lesley Nolen RADT-iMarketing and Outreach
Clinical and Case Management Team
Maria Carter, RADT-iSenior Case Manager
Mary Fritz, CADC-CASSenior Intake Specialist
Diane Shaw, CADC II, ICADCLead Case Manager
Octavia Macklin, MS, RADT-ICase Manager
Darla Simons, CADC-IUtilization Review Specialist
Tamika CarrollHead Intake Specialist
Roberto Palacios, CADC-CASIntake Team Specialist
Environment of Care
Michael WahlEnvironment of Care
Scott BallardEnvironment of Care
Rachel CorcoranClient Care Advocate
Marlys Wood, MS, MFTi, MT-BCMusic Therapist
Marlys Woods is a board-certified music therapist who has extensive experience supplying music therapy to substance abuse facilities. She has performed and taught music her entire life.
Marlys graduated from Chapman University in 2011 with a degree in music therapy and a minor in psychology, and she graduated from Vanguard University with an MS in clinical psychology. Marlys is in the process of becoming a marriage and family therapist and enjoys using her knowledge of relationships, people and music to help those who are struggling with addiction.
Marlys brings a variety of interventions such as active music making, songwriting, and lyric analysis, as well as relaxation techniques and art paired with music to her sessions. Marlys has successfully used these interventions to facilitate Cornerstone clients’ finding healthy coping skills as they move forward on their journey of sobriety.