Meet Dr. Jon

My child patients amaze and inspire me, and in turn, I strive to serve them with tireless enthusiasm and positivity. I love enjoying every day because each day is a gift. It is an honor that parents entrust me with their children’s care. I try to make a personal connection with every child, every time.

Dr. Jon Sierk

Dr. Jon Sierk has been serving the children and families of Colorado since completing his pediatric specialty training in 2003 and is proud to be a diplomat of the American Board of Pediatric Dentistry.

He loves spending time with his fiancée Stacy.  Together they enjoy hiking, baseball games or just walking around the park.  He also loves spending time with his extended family in Iowa and Oregon, especially his nieces and nephew.  Other interests Dr. Jon enjoys include reading and travelling, with Telluride, Bandon Dunes Golf Resort and London being a few of his favorite places.

After growing up in Bettendorf, Iowa, Dr. Jon graduated from Northwestern University in 1996 where he divided his time between studies and the varsity soccer team. He then returned home to attend dental school and complete his three-year pediatric dental residency at the University of Iowa.

Dr. Jon comes from a family of dentists, his father and two brothers also graduated from the University of Iowa’s College of Dentistry. Dr. Jon has participated in medical mission work in many locations in the Dominican Republic, extracting teeth for underserved families in remote areas. Dr. Jon is on staff at the Children’s Hospital of Colorado and served as an adjunct professor in the training program there from 2001–2011. He is also certified in Advanced Cardiac Life Support (ACLS) as well as Pediatric Advanced Life Support (PALS).

He volunteers time and resources to support Colorado families through local programs. In his free time, he loves to travel and hike with his fiancée Stacey, golf, read, keep up with his nieces and nephew, and cheer on the St. Louis Cardinals. Dr. Jon truly loves working with his child patients and is proud to have been named to "Denver's Top Dentists" by 5280 magazines yearly since 2011.

Professional Affiliations

American Board of Pediatric Dentistry
American Board of Pediatric Dentistry


About Us

Sierk Pediatric Dentistry is a pediatric dentistry office for children all ages in the Highlands Ranch area. We take kids dental hygiene seriously at our dental clinic.