Our Team


Rhonda – Orthodontic Office Manager

She joined our practice in 2000 after being in the dental field for five years. You’ll often find Rhonda staying busy around our office where she manages the front office and handles insurance and financial needs. Rhonda does her best to ensure that our practice runs as smoothly as possible for our patients so that they receive nothing but the most rewarding and hassle-free experiences here. Her favorite part of her job is interacting with our amazing patients and helping them navigate their time with us. Rhonda is a native of Cobb County. Her family includes a husband, John; a son, Brett; and a daughter, Kayla. When not at work, Rhonda enjoys spending time with her two grandchildren, Carter and Alyssa.

Kayla our Treatment CoordinatorKayla – Treatment Coordinator

Kayla joined our team in 2009 as an Orthodontic Assistant. She left us for a short time to finish her degree and returned in 2016 as our Treatment Coordinator. She lives with her husband, Jimmy, and son, Carter, in the Kennesaw area. Kayla is passionate about helping Build Better Smiles and educating our patients on every aspect of their orthodontic journey. In her free time, she enjoys watching her son play baseball and decorating her new home.


Brenda – Patient Care Coordinator

She is part of our front office staff. She has been with our team since 2014. Brenda has worked in the dental field for over 23 years. Her favorite thing about working in an orthodontic office is the change she sees in each patient’s self-esteem when they see their results. In her free time, she volunteers with Kingdom Hall, and she stays very busy taking care of her four children, Samantha, Jonathan, Nicholas and Rebecca. She also enjoys walking her dog, Zeik, at the park near her home.


Angela – Clinical Coordinator

Angela began working in the dental field in 1983 and joined our office two years after that. As our Clinical Coordinator, Angela oversees the clinical staff, orders supplies, and even assists at chairside during our patients’ appointments. Angela loves meeting new people while helping them improve their smiles. When Angela sees how happy our patients are, it really makes her job so easy and enjoyable. Angela also loves working for Dr. Sebastian because she finds him to be the best orthodontist in the area, and he is a perfectionist in every way! At home, Angela enjoys spending time with her wonderful husband. Angela is also a mother to three children. Two of them, Amber and Adonis, are twins, and Amber is currently in pharmacy school. Her eldest, Riquita, is married and has two children. When she has free time, Angela enjoys spending every free minute with her grandchildren.

Ashley is one of our orthodontic assistants

Ashley – Orthodontic Assistant

Ashley has worked in the orthodontic field for 12 years. She recently joined our practice in 2016 as an Orthodontic Assistant. She enjoys the opportunity to build relationships with each patient on their journey through orthodontics. She loves the challenge of the hands-on aspect of the field. Ashley has two girls, Kensley and Kennedy. They live in the McDonough area, and in her free time, Ashley loves to watch the Falcons and transport her daughters between softball and gymnastics.


Allison – Orthodontic Assistant/Invisalign Coordinator

She is an Orthodontic Assistant, and she has been part of our team since 2013. She has been in orthodontics for over 18 years. Her favorite thing about being an assistant is seeing the incredible transformations in each patient. In her free time, Allison enjoys hiking, and she is an avid George Michael fan. She recently celebrated the marriage of her son, Rodney, who lives in Florida with his wife. She also has a daughter, Paris, who is studying business at the University of West Georgia. 


Samantha – Orthodontic Assistant/Photography Coordinator

She is an Orthodontic Assistant with our team and has been with our office since 2013. Her favorite part of orthodontics is making each patient happy with a new smile. In her free time, Samantha enjoys volunteering at Kingdom Hall. She also loves to travel and do mission work in the Dominican Republic. She is currently learning how to speak Q’anjob’al, which is a Guatemalan dialect. This will help her speak with those she reaches out to in the mission field.


Penny – Lab Coordinator/Orthodontic Assistant

She is our Lab Coordinator and is also an Orthodontic Assistant in training. She has been with our office since 2014. She has worked in the dental field for over 16 years. One thing she loves about orthodontics is that this is a very hands-on field, and it keeps her challenged. She loves to read in her free time. She also has three children, Makayla, Ashden and Benjamin, who keep her very busy.


Theresa – Pediatric Dental Office Manager

A native from the Philippines, Theresa has lived in the United States for over 40 years. She met her husband in Baltimore and has two grown children, each busy in their own careers. A classical pianist, she has a Master's Degree in Piano and Performance from the Peabody Conservatory of Music, Johns Hopkins University. Last year, Theresa gave a concert at the Cultural Center of the Philippines. When not working, Theresa is involved in promoting Philippine culture; hence, she is one of the cultural leaders of the Filipino-American community in Atlanta. Currently the Office Manager for Dr. Powell, Theresa has been with the practice for 11 years.


MaryEllen – Dental Hygienist

MaryEllen has been a practicing dental hygiene for seven years after graduating from Clayton State University in 2009 with a Bachelor of Science in Dental Hygiene. She has been working at Dr. Powell's office for six years and loves specializing in pediatrics. She has also become known as the local tooth fairy around Atlanta. In her free time, she enjoys trying new restaurants with her husband, Britt, and hanging out with her fur baby, Cocopuff.


Devona – Dental Hygienist

Devona joined the practice in 2006. The highlight of her day is making kids feel special and working with them to make their dental visit pleasant and fun. When not at work, she stays busy with her two sons who play baseball and football.

Robin, one of our Dental Hygienists

Robin – Dental Hygienist

Robin has been a Dental Hygienist for six years and a pediatric dental hygienist for four years. After completing her degree from Central Georgia Technical College and starting her career, Robin quickly fell in love with the pediatric specialty. In her spare time, Robin enjoys traveling, spending time with her family, and going to Braves games.

Toni, one of our dental hygienists

Toni - Dental Hygienist

Elite Smiles Chastain

91 W. Wieuca Rd., Suite 300 • Atlanta, GA 30342Orthodontics: 404.303.7400 • Pediatric Dentistry: 404.252.5900

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