Dr. Juli Wemmer has practiced dentistry in Grand Rapids since graduating from the Ohio State University College of Dentistry in 1978. Dr. Jon Feinauer joined Stonecastle Dentistry upon his graduation from the University of Michigan School of Dentistry in 2008. Both are members of the American Dental Association and its associated regional and local organizations; Dr. Wemmer is a Fellow in the Academy of General Dentistry.

While they bring to the practice different allegiances (Buckeye and Wolverine respectively), Dr. Wemmer and Dr. Feinauer share a commitment to ongoing education so they can offer their patients the most effective innovative techniques and materials.

Ashley completed her dental assistant certification in 2012. She enjoys meeting and caring for Stonecastle’s patients in a fun and relaxing atmosphere. Outside of the office she has one canine child named Skylar. She enjoys golf, tennis, bicycling and camping.
Cara has been assisting since 1996. She joined Stonecastle Dentistry in 2009. She really enjoys working with the doctors who strive to provide the newest and comprehensive restorative procedures. She loves meeting and working with patients and assisting with the creation of a beautiful and healthy smile. She is married with two beautiful daughters, and has a loyal labrador. As a family they enjoy camping at Silver Lake. Cara enjoys outdoor adventures, gardening, canning, crafting and sports.

Debbie graduated in 1991 from the Grand Rapids Community College Dental Hygiene Program. She cares for her patients on a personal and professional level. She believes in emphasizing the importance of beginning dental education and home care at an early age. Debbie has worked exclusively for Stonecastle Dentistry since becoming a licensed hygienist; she values Stonecastle Dentistry’s fun and compassionate nature. Debbie is married and has three beautiful children.

Heather is a Registered Dental Hygienist who began her career at Stonecastle Dentistry in 2016. She graduated from Grand Valley State University with her Bachelor of Science degree in Communication Studies. Heather furthered her education at Grand Rapids Community College, earning her Arts & Applied Sciences in Dental Hygiene degree. She is a licensed hygienist in Michigan and Florida with certification in local anesthesia and nitrous oxide. Heather enjoys meeting new patients, helping reduce dental anxiety, and enjoys promoting happy, healthy smiles. When she’s not at work, you’ll find her traveling, hanging out with family and friends, spending time outside, kayaking, reading or exploring new breweries.

Jill is our office manager and is responsible for the financial aspects of the practice. Her goal is to help patients through the maze of insurance benefits, and to help them find financial solutions to obtain necessary dental treatment. She considers it an honor to work in an atmosphere that values its employees, and works diligently to provide patients with individualized positive and professional care. Jill has two daughters; she enjoys walking, reading, and gardening.
JoAnn joined the Stonecastle office team in the spring of 2014. A graduate of Michigan State University, JoAnn spent several years in international grant making. Her favorite part of working at Stonecastle Dentistry is interacting with fun coworkers and patients. She has three children. In her spare time, JoAnn enjoys the outdoors, traveling, movies, music and spending time with friends and family.
Julie has been assisting since 1996. She had the pleasure of joining Stonecastle Dentistry in April of 2016. She loves working with a team that is very caring and compassionate. Dr. Wemmer and Dr. Feinauer work very hard at providing their team with all the essential tools to help our patients maintain beautiful and healthy smiles. We love new technology and continuing education. Julie has a husband, son and yorkie shitzu dog. She enjoys scrapbooking, antiquing, and baking. Their son keeps them busy with his traveling baseball and basketball teams.
Liz joined the team in 2010 and her favorite thing about our office is seeing the smiling faces that stop in to visit. She feels very proud to come to work every day to work with such professional doctors and coworkers. She enjoys spending time with her family and friends as well as with her wonderful daughter, Callie of whom she is very proud of. She enjoys traveling, antiques, photography, walking at the beach. Liz graduated from Comstock Park High School.
Mae is a licensed Registered Dental Hygienist and joined the Stonecastle dentistry team in 2008. She enjoys and appreciates working with Dr. Wemmer and Dr. Feinauer who create an enjoyable and caring work environment for patients and staff. The favorite parts of her job are meeting and working with patients of all ages, getting to know them personally, and providing them with excellent dental care. Mae graduated from Grand Rapids Community College with an Associates Degree in Arts & Sciences, Dental Hygiene major. She and her husband, Ron live in Wyoming. They enjoy spending time with their two grandchildren. Mae also enjoys sewing, cooking, gardening, walking, reading and sporting events.
Nadia, a graduate of Calvin College, is proud to work with a team so completely committed to compassionate and exceptional patient care. As the practice Treatment Coordinator, her goal is to assist in the understanding of your recommended treatment options, as well as to explain how your dental benefits participate in your financial investment towards complete oral health. She has a passion for organization, community, and the arts. When not busy working, she enjoys wandering the Castle on the hunt for that, ever elusive, Room of Requirement.
Sarah has been a dental assistant since 1984. She joined Stonecastle Dentistry in 2002. She was drawn to Stonecastle Dentistry because of its beautiful and relaxed atmosphere and its latest technological treatments. Sarah thoroughly enjoys assisting on a variety of advanced procedures, such as pinhole grafting, and surgical implants. Her goal is to calm her patients’ dental anxieties and help them understand the dental care they are receiving and the value of the treatment. Sarah is married to her highschool sweetheart and has two beautiful daughters and an adorable puggle. Sarah’s passion and hobby in life is cooking. She specializes in Korean cuisine, and enjoys interior design, art, nature and music.
Shannon received her Associates degree in Applied Biology from Ferris State University. She is a Registered Dental Hygienist in Michigan, Minnesota and Colorado as well as being licensed in Local Anesthesia. Shannon joined Stonecastle Dentistry in 2008. She is thrilled to be part of an amazing team who gets to work in an awesome, historic building. One of the best parts of her job is connecting with all of the fabulous patients every day at Stonecastle! Shannon is married with a daughter and loves spending time with family biking, walking or just reading a book at any of the beautiful lakes throughout Northern Michigan. Shannon currently holds the office record for longest rinser/swisher, loves all things chocolate and she is deathly afraid of clowns!
Tammy graduated from GRCC in 1994 with an Associates Degree in Dental Hygiene, then joined Stoncastle’s team in October of 1994. She considers it her personal mission to help each individual protect and improve their oral health. Along with her concern for each of Stonecastle’s patients, Tammy always has a smile and a laugh ready to help ease treatment anxiety. Tammy is happily married and has two adorable canine children. She enjoys aerobics, walking, and reading. She is also interested in holistic health and fitness and has a degree in fitness and nutrition from ICS.
William is a Registered Dental Hygienist through the State of Michigan and received his Associate’s degree in Arts & Science from Grand Rapids Community College. He is also licensed in Nitrous Oxide Sedation and Local Anesthesia. William joined Stonecastle in 2014. It is his personal goal to help patients achieve their best overall health through great patient care, and informative patient education. William is married and has two cats, Bianca and Bernard. In his free time, he enjoys watching movies, dining out, and spending time with his family on the lake.


Monday 8:00am - 6:00pm

Tuesday 7:30am - 4:30pm

Wednesday 9:00am - 6:00pm

Thursday 7:30am - 4:30pm


Call us at 616.458.8593 to schedule an appointment and become a part of our community!


455 Cherry Street, SE
Grand Rapids, MI 49503


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