Meet Our Team


Practice Manager

Kim has been an integral part of Dr. Helfner’s team since 2009.  She’s been very successful in creating a warm and welcoming environment for patients and for those who work in the office. Kim works closely with Dr. Helfner and Dr. Curro to stay connected to the Commack community. Kim serves as an annual volunteer at the Commack Coalition for Caring 5K, she’s organized & hosted our Halloween Candy Buy Back events, she’s helped Helfner’s Heroes raise over $100,000 for cancer research & she’s organizing our incredible Patient Appreciation days. Kim spends most of her time helping patients. She discusses treatment plans and finances with patients to help make treatment understandable and affordable.  For those with insurance, she’s worked with patients to develop a plan to maximize annual benefits.  She works as the liaison between Bonnie Helfner DDS & the specialist offices to which we refer patients. She serves as an advocate on the patient’s behalf when dealing with insurance companies. Many patients take advantage of her insurance knowledge and experience when it’s time for open enrollment. Kim is always expanding her knowledge base whether it be attending workshops & conferences, participating in study groups, or taking webinars. Leading the team at Bonnie Helfner DDS PC has been an amazing opportunity and she is so grateful for all of the wonderful people she has met along the way. When Kim isn’t in the office you can find her spending time with her husband & two children. She enjoys the beach, yoga & entertaining family and friends.


Administrative Assistant

Lori grew up in Commack and has lived in the Commack area for 45 years. She has been married to her wonderful husband Ronnie for over 20 years and they have two amazing children. Lori was a meeting planner for a pharmaceutical advertising agency in the city for many years until she started her family. After being a stay-at-home mom for 14 years, she decided to work for a local preschool, where she has been able to share her love for children for the past 7 years. Lori’s warm and friendly demeanor along with her strong work ethic, will add to our already top-notch staff and wonderful front desk. Lori loves spending time with her family, connecting with her friends, walking her dog Roxy and reading a great book.


Administrative Assistant

Sherry Grew up and lives in Smithtown and joins the team with 25 years of dental experience. She is happily married to her husband Will and has 2 Children Ashley and Jeffrey. She also has 2 crazy dogs named Louie and Lorenzo! She and her husband enjoy the time spent with them and the kids.  She is a team player through and through and truly loves connecting with the patients. Sherry has always been known as a hard worker and her amazing work ethic will make her an integral part of the team. She looks forward to building relationships with her team mates and continuing to make patients time at the dentist as pleasant as possible. In her free time Sherry enjoys going out to dinner, baking at home and taking the dogs on long walks.  She and her Husband feel strongly about volunteer dog rescue and hope to devote more time to that in the near future.


Administrative Assistant

For the past 10 years, Dawn has been in the dental field, first starting out as a dental assistant, then branching out and expanding her knowledge to the financial end of dentistry at the front desk. Dawn’s consistent, nurturing personality drives her desire to be compassionate to the patients’ needs. For Dawn, true satisfaction occurs when she’s exceeded the patients’ expectations.  One of Dawn’s greatest assets is her expertise and knowledge of insurance plans. She loves helping patients with their insurance questions and benefit plans. In her free time, Dawn is an independent jewelry consultant for Swarovski Crystal where she enjoys party planning for her hosts.
Dawn is also a mom and loves spending time with her daughter, cooking, and spending time with her family and friends.


Administrative Assistant

Laura’s desire for helping others began while working with developmentally disabled preschoolers in 2001. With a background in computer technology, she transitioned over into the administrative medical field in 2009 before taking on the ever-changing dental field in 2018.  Laura’s compassion for helping others led her to work with FEMA in Puerto Rico in 2017 after Hurricane Maria and again in Florida after Hurricane Michael in 2018.  Laura grew up in Brentwood and is the proud mother of two amazing boys. In support of her sons, Laura completed two 5k races in 2018 and plans on continuing the newly acquired racing tradition. Her ultimate goal is to race in the NYC Marathon. Laura is an avid food lover and in her spare time, she enjoys music and dancing, sports and sleeping.


Registered Dental Hygienist

Helen joined Dr. Helfner’s team in 2002. She holds a BS degree in Economics from NYIT and is a graduate of the Farmingdale State College School of Dental Hygiene. Helen is a New York State provider of infection control training for healthcare professionals in addition to writing a bi-monthly blog for, pertaining to the field of infection control in health care settings. As an American Heart Association Instructor, Helen teaches courses in basic life support to other health professionals. She is actively involved in continuing education, participating in numerous study groups to stay up to date in the latest research and clinical practices in dentistry. Helen is a passionate educator, instructing her patients about the benefits of optimal oral health and its positive effects on overall health. When she is not working Helen enjoys spending time with her family and being outdoors, biking, kayaking, running, and hiking.


Registered Dental Hygienist

Sarah has been in the dental field for more than fifteen years. After working as a dental assistant for ten years, Sarah graduated from the State University of New York at Farmingdale as a dental hygienist where she earned the prestigious Guggenheim award for excellence and proficiency in the profession of dental hygiene. Sarah was also an active member of the Student American Dental Hygiene Association where she was a historian and helped with organizing fundraisers & functions. Sarah joined our practice in 2009 and has been an instrumental team player ever since. She is very warm and compassionate, always putting the comfort of her patients before anything else. Having grown up on Fire Island, Sarah has a love for the beach and enjoys visiting there when she can. Sarah is married and has a beautiful son, Kyle, and just recently added a baby girl, Hailey, to their family. Sarah has a philanthropic side to her as well. She has participated in Relay for Life, Give Kids a Smile Day, and volunteered at the Cancer Walk in Farmingdale.


Registered Dental Hygienist

Lindsey joined Dr. Helfner’s team in 2018. She holds an AAS degree in Dental Hygiene from Hudson Valley Community College. While attending she earned membership in the Phi Theta Kappa Honor Society and earned the Otto V. Guenther Scholarship for overall academic excellence. She also participated in internships at The Center for Disability Services and St. Peter’s Hospital. While working in the field, Lindsey earned her bachelor’s degree in Dental hygiene from Farmingdale State College. While attending Farmingdale Lindsey earned membership in the Golden Key International Honor Society for overall academic excellence, and completed a 40-hour internship in dental sales with Long Island’s Territory Account Manager for Ultradent Products. Lindsey also sat as a representative of the Dental Hygiene BS degree program at Farmingdale’s Dental Hygiene annual advisory board meeting to help contribute to improving the BSDH program for future students. She plans on going on to complete her Master’s Degree. Lindsey is extremely passionate about dental hygiene, loves her patients and working as a team. Lindsey enjoys volunteer events and participates every year at the Parkinson’s Unity Walk in Central Park.


Dental Assistant

Doreen has been Dr. Helfner’s invaluable dental assistant since 1999. When Dr. Helfner first met her, she knew Doreen was talented. At a very young age, Doreen had already worked with many dental specialties including periodontics, oral surgery and orthodontics in addition to her extensive work with general dentistry. Doreen loves being a part of the team and she and Dr. Helfner have become like family. When Doreen is not working, she enjoys spending time with her beautiful family including her husband Nick, her adorable daughters, Ava and Bella, and her pet boxer, Roxie. Doreen also loves hanging out with friends and playing cards. Her favorite foods are Mexican and Italian, specifically foods with lots of cheese. Two of her favorite movies are Grease and Overboard. It’s no wonder that everyone who knows Doreen loves Doreen. She is genuine, compassionate and has such a big heart. A few years ago, Doreen donated nearly a foot of her hair to Locks of Love. In 2014, Doreen suggested to Dr. Helfner that the office participate in the Adopt-A-Family program during the holidays. It wound up being a tremendous success as the office “adopted” two families. She is a very special asset to this practice.


Dental Assistant

Yolanda started working for Dr. Helfner in January 2015. Yolanda may be new to the practice but not to the field of dentistry as she has been a dental assistant for the past twelve years and loves all aspects of dentistry.
When not at work Yolanda enjoys spending time with her husband Paul and her Puggle, Jax. She also enjoys cooking, taking walks, and travel. 

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