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Meet the Dentists

Dr. Murray Knebel - Sierra Dental

Dr. Murray Knebel

Dr. Knebel was born and raised in Edmonton, and graduated from the University of Alberta in 1981. After gaining experience working in the military, he set up his practice in 1983. Dr. Knebel is passionate about dentistry and getting to know his patients and their families… Read More

Dr. Adriana Sopruniuk - Sierra Dental

Dr. Adriana Sopruniuk

Dr Adriana Sopruniuk was born and raised in Edmonton, Alberta and attended the University of Alberta, graduating with both her Bachelor of Science and Doctor of Dental Surgery degrees. She is fluent in Polish and Ukrainian.Dr Sopruniuk is a member of the Calgary and District Dental Society, Alberta Dental Association and College and the Canadian Dental Association… Read More

Dr. Meggan Herd - Sierra Dental

Dr. Meggan Schiffner

Dr. Schiffner’s passion in dentistry is treating families and developing a lasting relationship centered around her patients’ comprehensive dental health with a focus in prevention and education, starting at a patient’s young age of 1.She enjoys all aspects of general dentistry, and is specifically experienced in children’s dentistry, crowns, bridges, fillings, sedation… Read More

Dr. Jessica Thomas - Sierra Dental

Dr. Jessica Thomas

Dr. Jessica Thomas wanted to be a dentist from a young age, and continues to enjoy learning more about her chosen field. While Dr. Thomas practices general dentistry, she has particular interest in pediatrics, restorative, and cosmetic dentistry. She enjoys developing relationships and getting to know her patients. Through communication and sharing personal experiences, she endeavors to make a visit to the dentist less stressful…Read More

Dr. Sonja Tosic - Sierra Dental

Dr. Sonja Tosic

Dr. Sonja Tosic completed her Bachelor of Science and Doctor of Dental Surgery degrees in 2013 at Dalhousie University in Halifax, Nova Scotia. She practiced in Ottawa before moving to Calgary and joining the team at Sierra Dental. Dr. Tosic believes in building trusting relationships with her patients to create a comfortable environment and to help patients achieve and maintain their oral health for life. It is important to her that patients… Read More



Dr. Ben Thomas was born in Calgary and raised in Crossfield, Alberta. After high school, he spent two years abroad before moving to the United States to pursue further education. He completed his undergraduate education at Brigham Young University, where he majored in Neuroscience and minored in French. He then earned his Doctor of Dental Surgery degree, Master of Public Health degree… Read More



Dr. Poorvi Brahmania was born and raised in Regina, Saskatchewan. She moved to Saskatoon, where she completed her Bachelor of Science in Anatomy and Cell Biology and subsequent Doctor of Dental Medicine at the University of Saskatchewan. She spent two years practising in her hometown prior to moving to Calgary.Dr. Brahmania enjoys all aspects of dentistry, with a particular interest in pediatric… Read More



Dr Tristan Ocampo is a graduate from the University of Sydney, Australia, where he completed his Bachelor of Science and Doctor of Dental Medicine degrees. Dr Ocampo was born in Los Angeles and moved to… Read More


DR. Juhee Ko

Dr Juhee Ko was born in South Korea and moved to Canada for her education at a young age. She completed her high school and tertiary studies in Canada, obtaining both Bachelor of Arts and Science at McMaster University… Read More

Dr. Tom Shackleton

Dr. Tom Shackleton

Dr. Shackleton graduated from Northwestern University Dental School and is a practicing General Dentist.

He is a member of The Alberta Dental Association & College and the Canadian Dental Association… Read More


Dr. Rod Herchak

Dr. Rod Herchak was born and raised in SW Calgary. He graduated from the University of Alberta Faculty of Dentistry in 1980. He has maintained a high-quality dental practice in SW Calgary for 36 years… Read More

Dr. Jared Zeggil - Sierra Dental

Dr. Jared Zeggil

Dr. Jared Zeggil is a graduate of Dalhousie University in Halifax, where he completed both his Bachelor of Science and his Doctorate of Dentistry. He grew up in the Maritimes with his two brothers, who both now reside in Edmonton… Read More

Dr. Mostafa Altalibi - Sierra Dental

Dr. Mostafa Altalibi – Orthodontist

Dr. Altalibi received his D.M.D from the prestigious McGill University, graduating with the highest honor as the valedictorian of his class and having won numerous other awards including the American Association of Orthodontists Award… Read More


Dr. Curtis Westersund

Dr. Curtis Westersund earned his DDS from University of Alberta in Edmonton in 1979. He has practiced as a general dentist in Calgary for 37 years.
Dr. Westersund’s practice is focused on the treatment of Temporo Mandibular Disorders (TMD) with a physiologic approach to diagnosis and treatment as a general dentist… Read More


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