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Practicing Orthodontist

Dr. Siu grew up in Toronto, Canada and completed his Bachelor of Science degree in Life Sciences at the University of Toronto. He then pursued his dental career by earning a Doctor of Dental Surgery Degree at the University of Western Ontario, followed by a post-graduate General Practice Residency at the University of Rochester’s Eastman Institute for Oral Health. During Dr. Siu's training, he developed an extremely strong interest for orthodontics and strived to pursue further education to provide his patients with the highest standard of orthodontic care. Dr. Siu went on to complete his specialty training with a Master of Oral Science degree along with a Certificate in Orthodontics at the University of Illinois at Chicago.


Outside of the office, Dr. Siu enjoys playing badminton, basketball, soccer, and music. He also loves traveling and exploring local coffee shops. 


"Orthodontics is my life’s passion and I love helping to create beautiful smiles!"
- Dr. Harrison Siu


  • American Association of Orthodontists

  • American Dental Association

  • Wisconsin Society of Orthodontics

  • Wisconsin Dental Association

  • Illinois Society of Orthodontists

  • Chicago Dental Society

  • Ontario Dental Association


Financial Coordinator

Stefanie has been with Shawano Orthodontics since 2014 as the Financial Coordinator. She has lived in Shawano for over 20 years with her husband, Matt. Stefanie looks forward to working with you on your financial and insurance needs.


Treatment Coordinator, CDA/COA

Diane has been part of Shawano Orthodontics for over 30 years as the Treatment Coordinator. She lives in Shawano with her husband and 4 children.

Diane makes sure that your experience with your appointments are pleasant from start to finish.


Orthodontic Assistant, BA/CDA

Keri has been at Shawano Orthodontics for 13 years as an orthodontic assistant. Keri lives in rural Pulaski with her husband and son.

She enjoys talking with and making each patient comfortable during their adjustments.