Dental Staff

Dentist in Marble Falls, TX

All our professionals at Highland Lakes Dental maintain the highest levels of accreditation and pursue ongoing education to stay abreast of the latest trends in dentistry.


Margaret Cowling, DDS

Dr. Margaret Cowling is originally born and raised in San Antonio, Texas. She went to UTSA and UTHSCSA for her undergrad and graduate studies of dentistry. She lived in Houston for two years as a public health provclasser for the National Health Service Corps in a federally qualified health center provclassing dentistry for underserved dental populations. After JT and Margaret got married they moved to Abilene so JT could serve his time in the Air Force. Abilene has a special place in Margaret's heart as that's where two babies were born: Conner, 3 and Zoey 18 months. Margaret likes to go on walks and play with her kid. Anything related to water is a great time for the family.


Jefferson Cowling, DDS

Dr. JT Cowling hails from Sulphur Springs, Texas where he was born and raised. JT graduated with a bachelor's in Biology from Texas A&M Commerce. Then he completed his Doctorate in Dental Surgery from UT Health Science Center in San Antonio. It was in San Antonio that JT was lucky enough to have met Margaret. After a lot of persuading, Margaret agreed to marry JT. He was one of the few applicants to get accepted into the Air Force Dental Corps. JT served all four years at Dyess Air Force Base in Abilene, Texas. JT and Margaret have two children, Conner who is 3 and Zoey who is 18 months old. The Cowling's are proud to be part of this community and are excited to meet you.


Shannon Coulson, Hygienist

Shannon is originally from Tenessee.  She is married and has 3 beautiful children.  She attented dental hygiene school in Temple, TX.


Jolee Hibler, Hygienist 

Jolee is a Mom of two teenage girls.  She is from Wyoming and has been in Texas for 9 years.  She is passionate about the dental industry and is excited to bring her knowledge to our practice.  She enjoys outdoor water sports and is a huge football fan so she is truly a Texan! She looks forward to meeting and serving the needs Highland Lakes Dental patients.