Our Staff
Dr. Mark W. Langewisch B.ScH, M.A, Ph.D, C.Psych
Dr. Mark Langewisch is a Certified Clinical Psychologist registered with the College of Psychologists of Ontario, and a member in good standing of the Canadian Psychological Association. He obtained a Bachelor of Science Honours Degree (B.Sc.H) at Queen’s University in 1995 and was subsequently accepted at the University of Windsor. At the U of W, he earned his Master’s Degree (M.A.) in 1997 and his Doctorate in Clinical Psychology in 2003. “Doctor Mark” (as he is cordially referred to by a number of his patients/clients) has worked in hospital settings, including The Ottawa Hospital and the Detroit Medical Center with his clinical experience beginning in 1997.
Over the past twenty two years Dr. Langewisch has been in private practice in the Quinte area. A substantial part of his practice includes conducting independent, objective psychological assessments, and providing psychological treatment for clients who have experienced trauma during service in the military, and for those that have been injured in motor vehicle accidents and work-related accidents. Dr. Langewisch employs an eclectic therapy approach incorporating aspects of Cognitive Behavioural, Experiential, and supportive/process based therapy for a variety of psychological struggles including depression, anxiety, addictions, interpersonal difficulties, and personal development and growth.
Dr. Langewisch has completed numerous assessments of children and adolescents (through contract) for the local school boards regarding identification of potential learning, intellectual, and behavioural difficulties and disabilities and continues to do so privately with repeated and ongoing referrals from respected physicians, pediatricians, and child psychiatrists.
Dr. Deanna L. Mayfield B.A., M.A., Ph.D., C. Psych.
Dr. Deanna Mayfield is a certified Clinical and School Psychologist registered with the College of Psychologists of Ontario. She is currently a member of the Canadian Psychological Association; Canadian Association of School Psychologist; and Association of Chief Psychologist for Ontario School Boards. She has a Bachelor of Arts Honours Degree in Psychology and Sociology; a Master’s Degree in Counselling Psychology; and a Ph.D. in Clinical Psychology.
Over the past fifteen-plus years, Dr. Mayfield has been in private practice settings in the Quinte area, and for the past several years has been employed as a Psychologist with the Hastings and Prince Edward District School Board. Her work has focused on children and adolescents, including psychological and psychoeduational assessments, as well as individual and group therapy. Her assessment and treatment of children and adolescents encompasses a wide scope, including: learning disorders, developmental delays and intellectual disabilities, pervasive developmental disorders (i.e., Autistic Disorder, Asperger’s, PDD NOS, etc.), behavioural disorders, as well as trauma, adjustment issues, and social/emotional difficulties. Dr. Mayfield also sees families, and provides services to adults, including individual therapy and couple/marital counseling.
Dr. Marjorie Hogan B.ScH, M.Sc., Ph.D., C.Psych (Retired)
Dr. Marjorie Hogan attained her Bachelor of Science Honours degree in Psychology in 1998 and her Masters of Science degree in Psychology in 2001 from Trent University. She completed her doctorate in Clinical School and Child Psychology at the University of Toronto in 2009. She became registered for autonomous practice with adolescents and adults by the College of Psychologists Ontario in 2010; and with children in 2013.
Dr. Hogan has worked in school board, community social service and clinical agencies, private clinic, university disability office and hospital settings. She has taught developmental and abnormal psychology in the Department of Psychology at Trent University.
Dr. Marjorie Hogan provides psychological and psychoeducational assessments. She has a focus on identification of learning disabilities; and psychological, social, emotional, and behavioural issues that interfere with functioning at home, in school, and/or in the community.
Dr. Marjorie Hogan is now retired.
Tessa VanDiggelen, RMT, Office Manager
Having 25 years experience working one on one with clients in the health professional field and running my own business for 20+ years I decided to transition myself to be an office manager and psychoeducational tester for adults and children where I can continue to use my greatest strength and passion, helping others. I have much compassion for anyone dealing with life’s struggles so during covid I took many extensive courses over zoom in self/care, depression/anxiety, mindset/perspectives, confidence and grief!
I promise to greet you with a smile!
Career Opportunities in Belleville:
Interested in joining our staff? View available job opportunities here.
