Our Team

Meet Our Team

Experienced Dentist in Herrin, IL

We’re here to serve you! At the office of Donald G. Guebert, D.M.D. our friendly and dedicated team cares deeply about making sure you have a positive dental experience with us at every visit and that your needs and goals are being met. Whether you’re here for a routine cleaning or are getting a whitening treatment, our talented team is with you every step of the way.

For more information about us, or to schedule an appointment, please feel free to contact us today. We can’t wait to welcome you to our practice!


Donald G. Guebert, D.M.D.

Dr. Guebert is a native of Steeleville, IL and a graduate of Southern Illinois University School of Dental Medicine. Prior to dental school he received his bachelor’s degree in biology from the University of Illinois. Dr. Guebert and his wife Barb chose to make Herrin their home because their roots run deep in Southern Illinois. “Southern Illinois is a great place to live and we are happy that our kids grew up near their grandparents, aunts, uncles, and cousins.”

Growing up in a family of five boys Dr. Guebert recalls always being busy with basketball and baseball teams. That connection has stayed a large part of his life. His favorite pastimes remain a variety of sporting activities with his family. He stays active in sports by keeping score and statistics at the Herrin High School football and boys and girls basketball games. He also enjoys spending time hunting and taking exquisite care of his lawn.

As a dentist, Dr. Guebert is thankful that he can make a difference in his patients’ lives. “I love helping people achieve smiles that are healthy, functional, and beautiful. I am extremely honored to know that my work can be life changing for someone; whether it is relieving pain or anxiety, allowing someone to smile with confidence, or simply helping someone to enjoy eating again.”

Dr. Guebert is a member and past-president of the Southern Illinois Dental Society. He is also a member of the Illinois State Dental Society, American Dental Association, Pride Institute of Dental Practice Management, and GROWS Implant Study Group.

Dr. Guebert has a strong commitment to staying up-to-date with the newest advances, technologies, and changes in the world of dentistry. Because dentistry is a field that is constantly changing and developing Dr. Guebert and his team frequently attend continuing education courses and conferences.



Registered Dental Hygienist

Deanna’s favorite part about being a hygienist is getting to know her patients and helping them improve their smile. “The most exciting part of dentistry for me deals with aesthetics. Teeth whitening, all-porcelain crowns, and Lumineers that we offer can really change a person’s outlook on life.” Deanna enjoys spending her free time with her family, caring for her pets, and enjoying the summer sun.


Registered Dental Hygienist

Jen’s top motivation in dentistry is to help her patients feel comfortable and motivated to take care of their smile. “I’m a people person at heart and so I naturally enjoy the time spent getting to know our patients and making them feel at home. Its great catching up with our patients at their recall visits while still providing a valuable service. “ Most of Jen’s free time is spent with activities involving her three amazing daughters.


Registered Dental Hygienist

Debbie’s favorite quote is from Martin Charnin: “You’re never fully dressed without a smile.” Helping patients achieve a healthy smile is Debbie’s primary professional goal. Debbie says that one of the most rewarding aspects of her career has been patient interaction. “I strive to develop a rapport with my patients so that I may provide the best care possible and effectively educate our patients.” Debbie and her husband enjoy spending time with their family and whitewater kayaking in Southeast Missouri and North Carolina.


Registered Dental Hygienist and Dental Assistant

Amanda came to our office with five years of experience as a dental hygienist and a desire to learn more about dental assisting. “Becoming proficient at assisting has broadened my appreciation and knowledge of the restorative side of dentistry.” Amanda’s cheerful disposition puts her patients at ease and her proficiency in both assisting and hygiene enables our office to offer more flexibility in accommodating our patients’ busy schedules. Amanda and her husband Max enjoy traveling, going to St. Louis Blues games, and spending time with their family.


Dental Assistant

With several years of experience in dental assisting Crysta has become passionate about helping patients overcome their anxiety toward dental procedures. “Answering questions and having respect for each patient’s individual circumstance, without judgment, goes a long way in relieving anxiety.” Crysta and her husband spend most of their time raising their three children. During free time, they enjoy boating, swimming, and spending time together.


Office Manager & Treatment Coordinator

As the office manager Barb spends most of her day “behind the scenes” taking care of business operations and making sure that the office runs smoothly. She is happiest though when she spends time with our patients. “In my role as treatment coordinator I enjoy listening to our patients and then discussing with them all of the available treatment options so that together we can create a customized plan that is right for them.” She and Dr. Guebert are married and have three children. In her time away from the office she loves doing home improvement projects, quilting, gardening, and spending time with family and friends.


Business Administrator

Terri’s ten years of experience as a dental assistant prior to joining our front office team in 1990 has proven invaluable when she is helping our patients with their questions and concerns. “I understand the clinical side of dentistry and that helps me be a better advocate for our patients when helping them maximize their dental insurance benefits.” Terri and her husband enjoy traveling to Colorado to visit their son and his family which includes their two adorable grandchildren. Terri’s hobbies include enjoying the outdoors and looking for bargains at yard sales and on Ebay.


Appointment & Insurance Coordinator

With her workspace near the welcoming window, Nicole is likely to be the first one who greets you as you enter our office. She enjoys the opportunity to provide some conveniences for her patients: “ I always try to schedule appointments that are efficient and convenient for our patients’ busy personal schedules. Patients often tell me that they really appreciate the option to confirm their appointments with our email and text confirmation system.” With a husband, two young sons, and three dogs Nicole welcomes all added conveniences. She enjoys spending her free time decorating, doing craft projects, going to sporting events, and spending time with family and friends at the lake.