At Hearing Unlimited, our team is the heart of everything we do. Each member of our staff is committed to providing compassionate, personalized care to help you achieve better hearing and a better quality of life. With a blend of professional expertise and genuine dedication, we work together to ensure every patient feels comfortable, supported, and confident throughout their hearing journey. Get to know the friendly faces who are here to serve you every step of the way.
Your Hearing Health Specialists at Hearing Unlimited
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Mike Smith, HIS
Hearing Instrument Specialist
Mike Smith is a hearing care professional with over 35 years of experience in the hearing industry. Throughout his career, Mike has built a strong reputation for his deep product knowledge, patient-focused approach and commitment to improving quality of life through better hearing. Mike says, “He fits people not hearing aids unlike most of his colleagues in the industry”.
Known for his integrity and calm educational style, Mike has helped thousands of individuals and families navigate hearing loss with confidence. His decades of hands-on experience allow him to tailor solutions to each patient’s unique needs, ensuring comfort, clarity and long-term satisfaction.
In his spare time, Mike loves the outdoors whether it be hunting, fishing, snow skiing or spending time with family and friends.
Mike remains passionate about expanding awareness, reducing stigma around hearing loss and bringing cutting-edge hearing solutions to the communities he serves.
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Celia Martinez
Hearing Instrument Specialist
Hi, my name is Celia or Ceci as most call me. I am originally from California and made the big move to Iowa with 3 of my 4 children over the summer of 23′. So far we are enjoying it, but we’ll see how our first winter goes. In my free time I like to spend time with my kiddos and find new fun places to explore.
I have been in the medical field for 12+ years working in both in-patient and outpatient facilities as a phlebotomist. My experience in this field has strengthened my compassion and empathy towards my patients and gave me the ability to understand patients on a different level. I am also working on my Associates degree in Health Science to further my knowledge. Although I am new to the hearing aid industry, I am certain that this shift in careers will be a positive one. And I am excited to see what the future holds.
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Sandee Borer
Patient Care Coordinator
Sandee Borer is a Sr. Patient Care Coordinator. Sandee is originally from Ames, Iowa. Sandee started working at Hearing Unlimited in 1997. Sandee began working in the hearing industry in 1997 and was drawn to the profession because she finds fulfillment in providing services that benefit people’s lives.
What Sandee loves most about saving hearing lives is the ability to improve patients’ hearing and improve their quality of life. Sandee strives to treat each patient with compassion and understanding as each person’s situation is different in her everyday work with patients.
Outside of saving hearing lives, Sandee loves hobbies such as gardening, cooking and baking.
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Andrew Nelson
Hearing Instrument Specialist
Andrew is a licensed Hearing Instrument Specialist serving patients in the Central Iowa area. With an undergraduate degree in audiology and several years of experience in consultative service and client support, he brings a patient-first approach to every appointment—taking the time to listen, explain options clearly, and help people find the right solution for their hearing needs.
Outside the clinic, Andrew enjoys spending time with his wife and son, working in his backyard garden, and playing in local volleyball leagues. He’s passionate about helping people reconnect with the sounds and conversations that matter most to them.
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Mikayla Monahan
Mikayla grew up on a farm outside of Churdan, Iowa. She studied Agricultural Business at Iowa State University and earned a Bachelor of Science degree. In her free time, Mikayla enjoys spending time with friends and family, going on walks, and cheering on the Cyclones.

