Meet the Team

Choosing your hearing healthcare provider is a critical component to proper diagnosis and management of hearing loss. Sometimes it can be confusing when deciding who to trust with your first appointment to have your or a loved one’s hearing tested. We believe that knowledge is power, and with so many hearing healthcare options, it’s important to understand the differences so you can make an educated decision that is right for you.

Dr. Geissler’s Hearing Center was established in 2003 by Dr. Gina Geissler. Her first office was next door to her father, Dr. Evan Geissler, and his family practice office. Over the years, Dr. Geissler’s Hearing Center, has seen tremendous growth. In 2008, the practice expanded and two more offices were opened to better service our patients.

Dr. Gina Geissler, Au.D., and Dr. Brian Waldman, Au.D., look forward to helping you on your journey to better hearing!

"Dr. Gina and Dr. Brian take interest in their patients. They try to fit care around patients' lives. In this busy world it is such a help to have such care and caring people to help me."

Marjorie E.

"I have been coming to Dr. Geissler’s Hearing Center for 12 years. The hearing aids get better all the time and the staff is so accommodating."

Mark M.

"I was referred to Dr. Geissler’s Hearing Center by my personal physician. I have received the very best treatment and care from Dr. Brian. Also, the office staff has been very helpful and cordial in dealing with me and my issues that have arisen. I would wholeheartedly recommend to anyone needed treatment for hearing issues."

Randy F.

"I was referred to Dr. Geissler by my doctor. Since, I have received very good service. I always get reminder calls about appointments. It is a nice place to visit. "

Harry A.

"Have great people working here and very nice to deal with. I never have to wait long to see someone. They also took care of my wife who had a plugged-up ear."

Henry M.

Gina E. Geissler, Au.D., FAAA

Dr. Gina Geissler is a board certified Doctor of Audiology specializing in amplification for hearing loss in the adult and pediatric populations. She evaluates and treats people with tinnitus (ringing in the ears) and vertigo (dizziness). She also evaluates and treats those with hearing loss related to illness, ageing, noise-exposure, chemotherapy and diabetes.

Dr. Geissler received her bachelor’s degree from Marquette University in Milwaukee, WI and her Doctor of Audiology degree from Central Michigan University in Mt. Pleasant, MI. Her clinical Internship included training at the Veteran Administration Hospital in Tucson, AZ and overseas in Guatemala, Honduras, and the Dominican Republic. Her residency training was completed at Illinois Masonic Medical Center in Chicago, IL.

At least once a year, Dr. Geissler participates in a medical mission trip to Guatemala, Africa, or the Dominican Republic. She volunteers her time and services as part of a medical team. Throughout the year, Dr. Geissler collects donations of used and broken hearing aids which are refurbished and provided to children she treats on these trips. Donations are accepted at each office.

Brian L. Waldman, Au.D., FAAA

Dr. Brian Waldman is a fellow of the American Academy of Audiology, holds the ASHA Certificate of Clinical Competence in Audiology, and is a Certified Occupational Hearing Conservationist. Dr. Waldman enjoys all aspects of audiology, but has a special interest in fitting adults with hearing aids and aural rehabilitation.

Dr. Waldman received his Bachelor of Arts degree from the University of Iowa in Iowa City, IA. While at the University of Iowa, he also obtained a Certificate in Aging Studies. Dr. Waldman earned his Doctorate of Audiology degree at Northern Illinois University in DeKalb, IL. He has conducted research on the impact of concussions in athletes Dr. Waldman completed his residency at Mercy Clinic Audiology – Surgery Center in Springfield, MO. He is excited to be back in the Chicago area. Dr. Waldman is a sports enthusiast who enjoys talking about Chicago teams.

Doctor Memberships & Associations

David Tolliver

David’s 20-year Naval career took him all around the world, but he is happy to call Munster his final duty station. He holds a Bachelor’s degree in Criminal Justice (University of Maryland) and a Master’s Degree in Human Relations (University of Oklahoma).

David's role as Executive Director started in 2014 and he has truly learned to wear a lot of hats in the day to day operations. His favorite moments at work is hearing his kids coming down the hallway to visit him.

In his spare time David enjoys running and bike riding; however, he is most happy when spending time with his wife and children.


Kelly Medina

Kelly joined Dr. Geissler's Hearing in the fall of 2015. She is the Audiologist Assistant at the Hammond office. She helps the doctors preform cerumen removal and all other hearing aid duties with maintaining hearing aids and keeping them in their best working order. Kelly graduated with an Associate's degree in Applied Science from South Suburban College in May of 2012.

When she is not working, Kelly loves spending time with her husband Michael, their kids Mikey and Olivia, her dog Monster, and close friends. Her favorite things to do are going to the movies, spending time at the beach (preferably in the Florida Gulf), and bingeing on her favorite TV shows, some of which include the Walking Dead, Game of Thrones and Law and Order SVU.


Francesca Bonarigo

Francesca graduated from Illinois State University in 2015 with her Bachelor's degree. While in school and after graduation, Francesca worked in the jewelry industry for five years before joining the office at Dr. Geissler’s Hearing Center in December of 2018.

Francesca grew up in Lansing, Illinois, and then moved to Northwest Indiana. She enjoys spending time with her husband and their son James. Francesca likes watching scary movies, going for motorcycle rides on her husbands Harley, and playing board games. Her favorite games are Farkle and Zombicide.

Francesca is a big dog lover, especially her two Labradors Shelby and Cooper. When she isn’t with her family or playing with her dogs, you can find Francesca in her craft room!



Rachael Waldman

Rachael started working for Dr. Geissler's Hearing Center in 2022. Rachael is a licensed clinical social worker. She received her undergraduate degree at Northeastern Illinois University and her Masters degree at Loyola University of Chicago. Before joining Dr. Geissler's Hearing Center, she was previously providing clinical counseling in nursing homes.

Rachael loves spending time with her husband Brian, daughter Rebecca, dog Lucy, and birds Harley and Iggy. In her free time, you will find Rachael at Orangetheory fitness, watching sports, making pens on her lathe, or just relaxing with family.