Dr. Steve Morrison, D.O.
Dr. Steve Morrison
D.O.  ·  Doctor of Osteopathic Medicine
Founder & Medical Director

Dr. Morrison grew up in Snohomish, Washington, just outside Seattle. He obtained his undergraduate degrees in Cellular Biology and Spanish from the University of Washington, where he lettered in football as a wide receiver.

Steve attended medical school in southern California at the Western University of Health Sciences of the Pacific, and completed his residency at the University of Southern California. It was there that he met his future wife, Julie, who was studying dental hygiene at USC. They met on a blind date and were married a year later.

After they both graduated in 2003, they moved to Colorado. In 2007, Dr. Morrison founded 20 Mile Urgent Care and Family Medicine to bring something Parker didn't have — a clinic that could handle both urgent walk-in care and ongoing family medicine under one roof.

Outside the Clinic

Steve and Julie live in Parker with their three children. They love spending time with their kids riding bikes, skiing, fishing, and enjoying all that Colorado has to offer.

Ali Jackson, FNP-C
Ali Jackson
FNP-C  ·  Family Nurse Practitioner – Certified

Ali Jackson was born and raised in Waukee, Iowa. She attended Metropolitan State University and obtained her Bachelor's of Science in Nursing in 2014. She has spent most of her nursing career in pediatrics: case management for pediatric home care, working in the Neonatal ICU, on an inpatient pediatric unit, and in pediatric hematology and oncology.

Ali has always had a passion for health promotion and disease prevention, and decided to pursue her dream of becoming a family nurse practitioner. She obtained her Doctor of Nursing Practice from the University of Colorado, Colorado Springs.

Outside the Clinic

In their spare time, Ali and her fiancé enjoy traveling, spending time with their pup BamBam, hiking, and spending time with family and friends.

Tom Sittig, FNP-C
Tom Sittig
FNP-C  ·  Family Nurse Practitioner – Certified

Tom grew up in Baltic, South Dakota, just outside of Sioux Falls. He attended Augustana University where he earned his Bachelor of Science in Nursing. He obtained his Masters of Science in Nursing from Maryville University in 2024 with a family nurse practitioner focus.

Tom has been working as an internal medicine NP in Broomfield, CO, and as an urgent care NP at 20 Mile Urgent Care and Family Medicine, bringing a strong foundation in both primary and acute care.

Outside the Clinic

Tom and his wife welcomed their first child in October 2024. Outside of work, he enjoys spending time with family and friends, hiking, golfing, and cheering on the Denver Nuggets and Chicago Bears.

Grant Michalak, PA-C
Grant Michalak
PA-C  ·  Physician Assistant – Certified

Grant grew up in McKinney, Texas, about an hour outside of Dallas. He earned his undergraduate degree in Biology and Biochemistry from Hardin-Simmons University, where he also played baseball.

He graduated from the University of North Texas Health Science Center in Fort Worth with a Master of Physician Assistant Studies. While in school, he met his wife, Blair, and after getting married, the two relocated to the Denver area. Grant has clinical experience in Hospital Medicine, Emergency Medicine, and Primary Care.

Outside the Clinic

Outside of work, you can find Grant somewhere in the mountains taking advantage of everything Colorado has to offer.