Trevor Kuiper, DDS
Dr. Trevor Kuiper is a Northwest Iowa native. He was born in Spencer, IA and grew up in Sheldon. He completed his undergraduate studies at Northwestern College with a degree in Biology, and also took the mound as a southpaw for the Red Raider baseball team. Dr. Kuiper graduated from the University of Iowa School of Dentistry where he developed a strong passion for treating patients as an extension of his family.
Dr. Kuiper spent the first 5 years of his dental career administering gentle, personalized care to patients in Southeast South Dakota . He is a member of the American Dental Association, Iowa Dental Association, and the American Academy of Facial Esthetics. He has a dedicated commitment to continuing education and has completed advanced training in laser therapy, studied at the Wehrle Implant Immersion Clinic, as well as participated in specialized seminars at The Pankey Institute and Spear Education.
When he's not at the office, Dr. Kuiper enjoys staying active by chasing his kids around, volunteer coaching his son’s baseball and football teams, reading, and watching sporting events (especially Hawkeye Football). He has a heart for service and has participated in mission trips to the Dominican Republic and Jamaica, as well as volunteered at the Iowa Mission of Mercy. Dr. Kuiper is thrilled to get back to the area and establish meaningful relationships within the community. He resides in Sioux Center with his wife Kara and their children, Asher, Cohen, and Noa.
Abby Walth, Dental Administrative Assistant
Abby was born in Sioux Falls, SD and raised in Alcester, SD. She graduated from Alcester-Hudson High School. Abby is currently enrolled at the University of South Dakota where she is studying Dental Hygiene with a minor in addiction counseling. In addition to her school responsibilities, she is also working to become a licensed dental assistant.
In her free time, Abby enjoys being with family and friends. She likes to shop and spend summer weekends at the river. Abby is excited to keep building a future at Sioux Center Dental!
Haley Kelderman, Registered Dental Hygienist
Haley was born and raised on a farm near Inwood, IA. She attended the Netherlands Reformed Christian School in Rock Valley. After graduation, she pursued her passion for dentistry at the University of South Dakota and obtained her Bachelor's degree in Dental Hygiene in 2021.
In her free time, Haley enjoys spending time with her daughter doing various activities. They enjoy boating and camping in the summer and love being outside. She also enjoys spending time with her sisters and their children. Haley loves getting to know our patients and teaching them about the importance of dental health.
Heather Johnson, Insurance Specialist
Heather was born and raised in West Des Moines, IA, and she is a proud graduate of Dowling Catholic High School. After graduation, she pursued her education at Des Moines Area Community College and the University of Northern Iowa, where she majored in Psychology.
In 2009, Heather made a career change into the insurance industry and she’s been passionate about it ever since. She relocated to Northwest Iowa in 2024. Heather lives on an acreage just outside of Orange City with her husband, Wade, their three daughters, and two furbabies.
In her free time, Heather enjoys going to Sandy Hollow Beach and spending summers at Okoboji. She cherishes her evenings and weekends filled with friends and family. Heather is excited to help our patients navigate the complicated world of dental insurance. She is knowledgeable and always does her best to make sure you understand your insurance coverage.
Jadynn Riebeling, Dental Administrative Assistant
Jadynn was born and raised in northeastern South Dakota. She graduated from Webster Area High School and went on to attend Southeast Technical College in Sioux Falls, SD. Jadynn studied nursing and earned her Associates Degree in Business Administration.
Jadynn and her husband Dylan live in the country outside of Sioux Center with their daughter, Eleanore and two dogs, Rosie and Nelli. In her free time, she enjoys being outdoors, doing house projects, cleaning, shopping, and spending time with her family. Jadynn excels at managing our busy office schedule and will always greets patients with a warm welcome and smile.
Karlee Schiff, Registered Dental Hygienist
Karlee was born and raised in LeMars, IA. She graduated from LeMars Community High School in 2021. After graduation, Karlee attended the University of South Dakota where she studied Dental Hygiene. She finished her Bachelor’s degree in the spring of 2025 and moved to Sioux Center.
Outside of the office, Karlee enjoys spending time with family, her boyfriend, and her dogs. She also enjoys golfing with her boyfriend Brock, traveling, and going for walks with their puppies, Maverick and Cooper. Karlee is excited to bring her dental knowledge and expertise to Sioux Center Dental. She looks forward to developing relationships with our patients and helping you achieve your best oral health.
Kayla Visser, Registered Dental Assistant
Kayla was born and raised in St. Paul, MN. She completed the Dental Assisting program through Herzing University in St. Louis Park. Kayla started her dental assisting career at an Orthodontic clinic and has now expanded into general dentistry. She moved to Sioux Center, IA in August of 2022 to marry her husband, Logan.
Kayla and Logan have a Cockapoo named Lacey that keeps them quite occupied at home. In her free time, Kayla enjoys traveling, reading, and spending time with family. She also has a passion for clothes and home decor. Kayla specializes in making your visit comfortable and relaxed.
Lori Heim, Registered Dental Hygienist
Lori makes her home in Sioux City, IA. She attended the University of South Dakota where she studied Dental Hygiene. Lori completed her Bachelor’s degree in 2007 and has been working in the dental field ever since.
Lori has a daughter named Kelsey and 2 pups, Addie and Toby, that she adores. In her free time, Lori enjoys spending time outdoors staying active hiking, biking, and kayaking. She also enjoys reading and traveling. Lori brings a wealth of experience to Sioux Center Dental and she excels at helping our patients understand how to achieve their best dental health.
Mallorie Yeske, Registered Dental Assistant
Mallorie was born and raised in Orange City, IA. After high school, she attained her Associates of Science degree through Northwest Iowa Community College. She worked locally in the field of radiology for a while before discovering her love for dentistry. Mallorie became a registered dental assistant in 2016. She began her dental career in Endodontics and has expanded her knowledge and skills in general dentistry while working with Dr. Kuiper!
In her free time Mallorie loves spending time with her husband, daughter, and dogs. Her hobbies include walking, golfing, reading, and shopping. Mallorie is excited to bring her love of patient care and dentistry to Sioux Center Dental to make your visit as easy as possible.
Kara Kuiper, Business Manager
Kara (Dr. Kuiper's wife) was born and raised in Pierre, SD. She graduated from T.F. Riggs High School and went on to study at Minnesota State University, Mankato. Kara has a Bachelor's degree in Accounting and a Master's degree in Sport Management. She has previously worked in both governmental and private accounting, most notably as the Controller for nation-wide fitness retailer, Push Pedal Pull. Kara handles all of the business/financial/HR functions for Sioux Center Dental. She works out of her home office while also caring for their three children.
When she's not crunching numbers, Kara enjoys working out, spending time outdoors, shopping, reading, and watching sports. Her favorite place to visit is Lake Oahe and she can be found there often throughout the summer months. Kara is excited to be living in such a vibrant community and is looking forward to creating long-term relationships here.