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 Chief Medical Officer
Lin Long, BC-FNPFamily Nurse Practitioner
Malcolm John Wehrle, MDAddiction Medicine Physician
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.
Amal Bolis Tanagho, MDConsulting Psychiatrist
Jeanette Ponce, MDPhysician
Phil Kosanovich, MBAChief Executive Officer
Phil has a senior leadership profile that spans from entrepreneurial ventures to global corporations. His experience includes consulting, operational, and executive-level roles in the behavioral health and addiction treatment industries that include co-founding and growing two residential and outpatient treatment centers. Phil is an inclusive and transformational leader with a reputation for building strong client/patient-centered teams focused on clinical excellence. He has an extensive record of success in leading companies through transitional periods of growth and creating and maintaining strong external partner relationships. Phil’s expanded healthcare industry experience was with Landauer, where he started two subsidiary companies and led company operations in Australia and China.
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.
Samantha Stone, BAPresident
“Samantha (likes to go by Sam) graduated from California State University, Fullerton with degrees in Psychology and Sociology. She has been with Cornerstone since its conception in 1984. She started in the Business office sending out insurance claims and collections. After that she moved to Admissions and Intake. She has spent most of her career in Intake/Admissions talking to potential patients and families about the programs at Cornerstone and what to expect. From Intake she moved into Management with becoming the Senior Vice President then President in 2019.
Personal Life: Sam has love for all animals especially dogs and cats. She loves hiking, road-biking, movies, theater, traveling, and different cuisines. She is currently assisting in helping Cornerstone start an LGBT (short for LGBTQIA2+) program.”
Simon A. Stone, BASenior Vice President, Safety Officer, Corporate Business Development and Court Liason
Timothy Stone, BASenior Vice President
Tim Stone has been part of the Cornerstone Team since 1999. He began his career assisting with the upkeep of the Recovery Residences that he now oversees. Tim’s responsibilities include ensuring that Cornerstone’s Recovery Residences are following the California DHCS, Joint Commission and CCAPP regulations at all times. Tim is also responsible for Cornerstones IT, SEO and overall on-line presence, working as the company liaison with our external expert partners in these areas. Tim is also responsible for our ‘Environment of Care’ team, which is accountable for all the on-going maintenance, repair, improvement and housekeeping needs of the company.
Tim enjoys surfing, reading a good book and playing guitar. He was the Lead Singer/Songwriter for the music group The Goodkind (for those interested, find them on Spotify).
Tami K. Campbell, CADC-CASDirector of Operations
Lesley Nolen, RADTMarketing and Outreach
Marquise Johnson, BAHuman Resources
Aryan Monroe, BA, MA, LMFT, CSClinical Director
Monnaye Bernal, ASWTherapist
William Dexter, MA, AMFTTherapist
Maria Carter, CADC IIResidential Program Coordinator
Dane Jones, CADC IOutpatient Program Manager
Diane Shaw, CADC IILead Case Manager
Crystal Melms, CADC, CATCCase Manager
Montana Dellinger, BA, RADTCase Manager
Victoria Scott, BSHS, MS, LAADCCase Manager
Bill Carney, MS, SUDCC IVCase Manager
Samuel David Michael, RADTCounselor Tech
Octavia Macklin, MS, RADTCase Manager
Marlys Wood, MS AMFT, 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.