Sierk Children's Dentistry

Meet the Teams at Our Locations

We Believe in Quality over Quantity

We have deep respect and care for our patients and their families, and we value the relationships we’ve cultivated over our 15 years of practicing children’s dentistry in Colorado. Our team is experienced and skilled with children’s dental care, and we always enjoy meeting new patients and getting to know their families. It’s our greatest joy to watch children grow into young adults and know that we helped make them smile. 

We Love Our Community

Whether it’s providing breakfast for local teachers, supporting our friends with The Harmony Dance Team or sponsoring Autism Awareness and Down Syndrome Awareness events, we are here for you and your family. We take pride in our community, and we consider caring for our community’s oral health a joint effort. Because of our unending efforts to improve children’s oral health, we work with local pediatricians and specialists in Castle Pines, Highlands Ranch, Lone Tree, Castle Rock, Parker, and Littleton. 

To learn more about our team, we invite you to read our bios or give us a call at (303) 865-4066.

We can’t wait to speak with you and help your child on their path to great oral health!

Dr Jonathan Sierk | Pediatric Dentist

Dr. Jon Sierk

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

"I am humbled by the trust our patient families have in the care that my team provides. When a child is in our care, they are treated as if they are one of our own.”

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 then on to complete an extensive three-year residency at the University of Iowa specializing in the dental care of children, and patients with special health care needs.

Dentistry is a family affair for Dr. Jon. His father and two brothers also proudly graduated from the University of Iowa’s College of Dentistry. Dr. Jon is on staff at the Children’s Hospital of Colorado and served as an adjunct professor in the training program there from 2005–2011. He is also certified in Advanced Cardiac Life Support (ACLS) as well as Pediatric Advanced Life Support (PALS).

Dr. Jon volunteers time and resources to support Colorado families through community outreach programs.  Dr. Jon has participated in medical mission work in many locations within the Dominican Republic, extracting teeth for underserved families in remote areas.  

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. Telluride, Bandon Dunes, and London are a few of his favorite places. 

Dr. Jon truly loves working with his child patients and is proud to have been named to "Denver's Top Dentists" by 5280 Magazine yearly since 2011.

Practice Administrator for Sierk Children's Dentistry


Practice Administrator

A Colorado native, Kim has recently returned from Austin, Texas in 2018. She brings over 20 years of dental experience to our practice.  Her insurance experience comes from years as a dental assistant, consultant and dental practice manager. She is our “go-to” person when patients have insurance questions or need assistance choosing their yearly dental plan.  

Kim earned an Associate’s Degree in Dental Assisting as well as a certificate in Human Resources. These degrees and experience allow her to utilize her Medical and Dental knowledge to benefit our patients and team.  

You will often find Kim at her beloved Broncos games, fishing, camping, and hiking with her two dogs, Bug and Lady. 

Kim P | Pediatric Dentist Highlands Ranch

Kim P.

Expanded Functions Dental Assistant

Our newest team member, Kimberly, is a well-traveled Colorado native. She has recently returned home from living in Florida, France, Hawaii, Oregon and Washington. Kimberly has extensive dental assisting experience as well as practice development in general dentistry.

Kimberly holds an Associate of Arts Degree in Health Administration and certificates in expanded function dentistry. She has seen apprehensive adult patients, and Kimberly now takes great pride in making an impact by creating positive lifelong dental patients by starting kids off in a positive, warm environment. In her free time, Kimberly loves to travel with her husband, Paul.

When they are home, Kimberly and Paul love to relax and spoil their dogs Pepe and Bella and their cat, Kitty Kitty.

Healthy Teeth Lead to Happy Smiles!
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