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Meet Our Team of Dental Experts

Team at Costello Dental Excellence posing and smiling

Office Manager and Front Office Team Leader Liz Liz, Office Manager and Front Office Team Leader

Liz has had a well-established career in dentistry, beginning with chairside assisting while working on her teaching degree at NEIU in Chicago. Her career has evolved over a 36-year span. Liz is our Office Manager and Front Office Team Leader and has been with our office for over 15 years. She is easily recognized by her cheerful voice and pleasant smile. Most of our patients look to Liz to accommodate all their scheduling and treatment planning needs. Liz has been certified through the Scheduling Institute in extraordinary telephone customer service, making her a true asset and leader in our office. She enjoys biking, traveling, reading, watching movies, visiting the botanical gardens, studying French and taking online courses. She is fluent in Polish and hopes to travel there one day. Spending time with the love of her life, Tyler (her 7-year-old grandson) takes precedence over all.

Dental Hygiene Team Leader Anne Marie Anne Marie, Dental Hygiene Team Leader

Anne Marie began her affiliation with Dr. John Costello as a high school sophomore working part-time as a Dental Assistant. Her interest in dentistry led her to Dental Hygiene school where she completed all coursework at Harper College and now presents to our patients the experience of a 23-year career in Dental Hygiene. She is the Director of Hygiene Care and Periodontal Instruction in our practice as well as our Dental Hygiene Team Leader. She is certified in local anesthesia and nitrous oxide sedation. In this capacity, she is better equipped as a Dental Hygienist to provide professional services for even the most sensitive patient procedures. Anne Marie is a certified Auxiliary in the Invisalign tooth alignment system. Most recently, Anne Marie was certified through the Scheduling Institute in extraordinary telephone customer service. She enjoys spending time with her family and friends.

Dental Hygienist Mary Mary, Dental Hygienist

Mary has been a Dental Hygienist for 30 years and still loves what she does on a daily basis. She states “It is so very rewarding helping patients and getting them motivated to care for their mouths, which then improves their general health.” Mary has also been certified through the Scheduling Institute in extraordinary telephone customer service. Originally from Lincoln Nebraska, she graduated from the University of Nebraska where “Yes, they really do know and love football!” She has been married for 15 years to her husband and best friend, Larry. They have two daughters. Emily is a Senior at the University of Nebraska and Katie is a Sophomore at the University of Nebraska. Mary loves to read and travel.

Dental Hygienist Carla Carla, Dental Hygienist

Carla is a Dental Hygienist and has been providing hygiene services for Costello Dental Excellence for almost 10 years. She first came to our office as a patient.   She has over 20 years of dental hygiene experience, with a strong background in Periodontics and Implant Dentistry. Carla is certified in local anesthesia as well as nitrous oxide sedation, making her a very knowledgeable asset to our team. Most recently, Carla was certified through the Scheduling Institute in extraordinary telephone customer service. Her pleasant nature and extreme competence have been a wonderful enhancement to our full-time staff. She lives in Arlington Heights, with her husband and three children. She enjoys spending her time with family and friends.

Dental Hygienist Laura Laura, Dental Hygienist

Laura is a Dental Hygienist who began her dental career with Dr. John as an assistant back in 2006.  His enthusiasm and love of his work got Laura interested in learning more about the dental field.  After a few years of dental assisting, she went on to get her degree in Dental Hygiene and graduated from Harper College in 2010.  With her gentle touch and calm chair side manner, Laura provides exceptional care while making patients feel as comfortable as possible.  She is certified in both local anesthetic and most recently through the Scheduling Institute in extraordinary telephone customer service.  In her free time, she likes spending time with family, friends, and her dog, Jenna.  Laura is a huge Chicago Blackhawks and San Francisco Giants fan. During baseball season, you may overhear her giving Dr. John a hard time about the Chicago Cubs.

Dental Assisting Team Leader Margaret Margaret, Dental Assisting Team Leader

Margaret is one of our full-time dental assistants and is our Dental Assisting Team Leader. She has been affiliated with Dr. John Costello for over 18 years, serving as his chairside assistant. She is proficient in all phases of general and cosmetic dental assisting and also serves as the person responsible for the beautiful enhancements that result from her assistance in tooth whitening and shade selection. She has completed coursework to enable her to perform tooth polishing and sealants as a hygiene assistant and has been certified through the Scheduling Institute in extraordinary telephone customer service. Margaret is also bilingual, speaking fluent Polish, and brings her pleasantness to the workplace all the way from Lake Villa, Illinois.  Margaret is married to Peter and has twin daughters, Michelle and Paulina, who are in college. Her family plays a large role in her life. Margaret enjoys going on vacations with her family, especially to warm sunny places like Florida. In her free time, Margaret likes going to the health club to enjoy some Zumba and talking walks with her husband.

Dental Assistant TerriTerri, Dental Assistant

Terri has been in the dental arena for over 40 years.  After completing the Dental Assistant Program at Loyola, she was a chairside assistant for 25 years.  Terri has enjoyed working alongside Dr. Trumfio for 15 years and has long lasting relationships with our patients.  Terri has also been an integral part of the Office Team and has been a key element to helping our patients receive excellent care. She has a passion about helping others and volunteers her time at various local ministries.  In her free time, Terri loves to spend time with family & friends and enjoys gardening.

Dental Assistant Renee Renee, Dental Assistant

Renee has been of a part of Costello Dental Excellence since 1970.  Under the guidance of Dr. Costello and Dr. Trumfio, Renee learned Chairside Assisting and worked full & part time in this practice for 46 years.  She is a seasoned and experienced Dental Assistant in all aspects of general dentistry.  Renee is an artist and has been known to draw pictures for the children in our practice. In her free time, she enjoys writing poetry and spending time with her husband, grown children and her 9 grandchildren.

Dental Assistant Carly Carly, Dental Assistant

Carly is a dental assistant and has been with Costello Dental Excellence since July of 2016.  She enjoys working our patients and being part of a family-oriented practice. has An Arlington Heights native, she attended Wheeling High School and Harper College. Though Carly has been with the team for just a short while, she has been a part of some amazing cases. "Being a part of the case from day one, and seeing the end result months later is the most rewarding thing about my position." She loves her very outgoing, sarcastic family, and when she’s not working she enjoys spending time with the people she cares about and making the most of every moment with them. Carly likes to sing and dance in order to make everyone around her smile.