Rendon Orthodontics

Orthdontic Specialists for Children and Adults

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Meet the Team



Lisa Trejo


Treatment Coordinator / Insurance Coordinator

I was born in San Antonio, Texas and currently reside in Frisco.  I have had the pleasure of being in the orthodontic field since 1996.  Most of my orthodontic career has been as a chairside assistant, but made the switch to administrative responsibilities a few years ago.  It is truly rewarding to watch a patient who is insecure, shy and introverted (partly due to having crooked teeth) grow to become confident and outgoing.  It is an amazing transformation that will never cease to fascinate me.  I am the proud mother of two boys and have been happily married to my husband for 20 years.  My favorite hobbies are to do crafts and, of course, to shop.  I really enjoy working with both doctors because they are genuine, caring, and generous people that really love what they do.

Sonia Ponce


Scheduling Coordinator

When you come into our office, I am usually at the front desk scheduling your next appointment.  I really enjoy talking with each of our patients and their families. I am a registered dental assistant with certifications in Hospital Administration and Medical Records. I was born in Dallas, TX, and have been living in Little Elm since 2003. It is great to work near my home and with my neighbors. I have been married for over 20 years and am blessed with four children. When I’m not working, I enjoy going to the movies, to local sporting events and to church with my family. At Rendon Orthodontics, our patients enjoy a family atmosphere and we have the privilege of getting to know each family and giving them personalized care. I have been working at Rendon Orthodontics for several years now and as I have gotten to know the Doctors the thing I most admire about them is their dedication to our patients. They definitely go the extra mile!

Diana McElroy

Scheduling Coordinator

I was born and raised in Texas and happy to be back home after living in New York City for the last 14 years. My wonderful husband, Bill, and I love spending time with our two sweet dogs Cosmo and Starsky. We enjoy sports, listening to music, cooking, reading and traveling.
I have been working in general dentistry for over 20 years.   I am very excited to be the newest member of Rendon Orthodontics and to be part of a warm and friendly team of people that provides exceptional care while creating an excellent patient experience. I really  enjoy interacting with patients of all ages, connecting with them, and doing what I can to help them.  I love coming to work and seeing the progress patients make from visit to visit.  It's wonderful to see how changing a patient’s smile transforms their lives.


Ana Velasquez


Head Orthodontic Assistant

I was born in Dallas, Texas, and have been in the orthodontic field since 2003. I began working as a receptionist and became certified as a chairside orthodontic assistant soon after. Ever since, it has been a great experience learning so much about how to achieve beautiful smiles. I love working with children and adults and enjoy the rewarding experience of seeing their whole lives change during the time we see them. I have two amazing children with whom I love spending quality time. My favorite hobbies are to play sports and watch movies with my friends and family. Also, I absolutely love to sing! It's been an awesome experience to work at Rendon Orthodontics. The doctors are very professional and treat their patients very kindly.

Kimberly Rodriguez

Orthodontic Assistant

I am originally from Sunny, Florida and now live in Frisco with my fiancé and son.  I have been in the orthodontic field for over 20 years as an assistant.  I am blessed to have found such a fulfilling area of expertise to be a part of. When I’m not treating patients and helping them create their beautiful smile, I enjoy keeping busy with my family doing outdoor activities and crafts.  The Rendon family has made me feel very welcome, as I know they will you.    

Ellen Schandlbauer


Professional Relations Coordinator

In May 2012, I became Rendon Orthodontics' professional relations coordinator. I love marketing our practice both internally and externally to dentists in the community. My job takes me to many dental offices and allows me to interact with lots of interesting people. On the days I am working in our practice, I am blessed to be in the company of amazing coworkers. The staff at Rendon Orthodontics is kind, professional and completely dedicated to their patients. I am the proud mother of two children and am happily married to my wonderful husband of 13 years. When I am not working, I enjoy spending time with my family. My dream day would be exploring the wonders of nature with my loved ones in a Spanish-speaking country!