Our Doctors

After growing up in a small town in West Texas, Dr Sims is finding Clarksville a natural fit.  His parents still own and operate the cattle ranch and farm he worked on as a kid, and he occasionally returns to help out when he can.  He knew he wanted to be a dentist at 17 years old, and to achieve that goal, he attended college at West Texas A&M and then graduated from Baylor College of Dentistry in 2005.  

Dr Sims spent the first 12 years of his career both practicing dentistry in Hendersonville TN, and teaching for the largest provider of dental services in the world.  After spending several years as Program Director for dentist education, he decided to slow down on traveling and focus on practicing dentistry and raising his 2 kids.  “I have always enjoyed giving back to the profession through teaching, and I hope to return to it someday.”  Dr Sims took over as the owner of Hillcrest Dental in 2018.  “I am thankful I get to carry on the legacy started here in 1983 by Dr. Garrett.”  During his spare time he enjoys playing sports with his kids as well as competing in triathlons and participating in CrossFit classes.

Dr. O’Rourke was born in Knoxville, Tennessee and graduated from Webb High School in 2008. After high school, Dr. O’Rourke attended The University of Tennessee in Knoxville and graduated with a Bachelors of Science in Biochemistry in 2012. Dr. O’Rourke then attended the Temple University Kornberg School of Dentistry in Philadelphia, Pennsylvania. Upon graduation he moved to Nashville to be closer to family and friends and began practicing at Hillcrest Dental.

Dr. O’Rourke continues to live in Nashville and enjoys attending Nashville sporting events and concerts, going out to eat with friends, and cheering on the Tennessee Volunteers! Since moving back to Tennessee he continues to love treating, helping, and caring for the great people of our great state.

When it became time for Dr. Darwin to look for work opportunities, she wanted to experience a new state and a slower pace - Tennessee with its natural beauty and kind people seemed like the perfect fit. Being married to a Marine Corps veteran, Dr. Darwin appreciates the unique community in Clarksville.

In her free time, Dr. Darwin loves finding a new hiking trail, cooking with her husband, or singing a little karaoke. While she’s a true Dallas Stars fan at heart, she loves cheering on Smashville during hockey season.