
Mark Sadler
Executive Director
Mark is a passionate and compassionate individual who brings a wealth of experience to the treatment centres from various facets of his life.
Formerly involved in managerial roles in the fast paced corporate world, when blessed with the opportunity to play a major part in helping others to a new and much better life, he jumped at the chance. Mark understands the importance of making the decision to attend treatment and the serenity that comes with the knowledge that you have chose the treatment center that is right for you. Mark has vowed since the inception that Top of the World Treatment Centers will conduct it self in all aspects with the utmost integrity. He feels when you talk with us on the phone and view our website you will get an immediate sense of that integrity. Mark’s number one goal has been to find the best staff available and he sincerely feels that not only has that goal been met but has exceeded his high expectations.
Dr. Ronald Lim, BSc, MD, CCSAM, CASAM, CISAM
Medical Director
Ron combines his passion for addiction treatment with his experience and expertise to help maximize the effectiveness of our programs at Top of the World Treatment Centres. Dr. Lim attended the University of British Columbia where he obtained a Bachelor of Science in Biochemistry as well as a Doctor of Medicine degree. Over the last 7 years he has been practicing Addiction Medicine. He is certified by the International Society of Addiction Medicine, American Society of Addiction Medicine and the Canadian Society of Addiction Medicine. He is presently Clinical Lecturer for the Faculty of Medicine, Department of Psychiatry at the University of Calgary. He is Medical Director for the Addiction Network and consulting physician for the Chronic Pain and Addiction Service and Concurrent Disorders Program of the Foothills Addiction Centre in the Calgary Health Region. He also is consulting physician to AADAC"s (Alberta Alcohol and Drug Abuse Commission) Opiate Dependency Program and AADAC's Renfrew Detoxification Centre. He is also involved in the Alberta College of Physicians and Surgeons' methadone guidelines committee and is one of the presenters for the college's methadone workshops. He regularly gives presentations for the University of Calgary’s Faculty of Medicine Continuing Medical Education on topics related to Addiction, Chronic Pain and Methadone Maintenance.
J.P. (John) Streukens, Ph.D.(c), M.Ed., R.Psych., ICADC
Clinical Director
Mr. Streukens comes to us with over 20 yrs experience in the Substance Disorders field. Mr. Streukens has his Ph.D. candidacy and he is finalizing an additional piece of research in the area of alcoholism and spirituality. His work experience has included employment within detoxification and inpatient treatment facilities, EFAP consulting, and private practice. He initiated the term SAE (Substance Abuse Expert) as a Canadian response to the SAP (Substance Abuse Professional) and he continues to provide development and direction to this essential industry process. Mr. Streukens has extensive experience in the development and delivery of Psychological Disability Management Programs. Beyond his academic credentials, he is a current Board Member of DACSAW (Drug & Alcohol Council for Safe Alberta Workplaces). Upon meeting John there is an immediate sense of his commitment and his passion for the wellbeing of others through his work in the field of addictions and mental health. We are excited to have him as part of our team.