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Meet Our Team

joseph hegarty

Joseph Hegarty, M.D.

Joseph L. Hegarty, MD is a board-certified physician who specializes in skull base surgery, otology, and neurotology. He attended Cornell University to complete his undergraduate studies and graduated with honors. Dr. Hegarty then graduated with honors from Jefferson Medical College, followed by a five-year otolaryngology residency and two-year cochlear physiology fellowship at the hospitals and clinics of the University of Iowa. After his residency, he completed a two-year fellowship in neurotology and skull base surgery at the University of California, San Francisco. This fellowship was under Robert Jackler, MD’s direction. Since 2001, Dr. Hegarty has practiced in Colorado, and his practice is limited to hearing and balance systems diseases.

michael illiff

Michael Iliff, Au.D.

Michael Iliff, Au.D, is a clinically certified audiologist who obtained his Communicative Disorders bachelor’s degree from the University of the Redlands in California. After that, he went to San Diego State University and earned his master’s degree in Audiology. Dr. Iliff completed his Doctorate in Audiology at the Arizona School of Health Sciences. He started Castle Rock Ear Associates in 2021 with Dr Hegarty as an extension of Colorado Springs Ear Associates, and his services include comprehensive hearing rehabilitation, which includes assistive listening devices, hearing aids, and surgically implanted devices, such as BAHAs and cochlear implants. Dr. Iliff has served on multiple boards serving the hearing impaired, and he has served many major hearing aid manufacturers as a technology consultant. His own hearing loss for many years requires he uses hearing technology. “As someone who is hearing impaired and uses hearing technology, I’ve always felt the most satisfaction when I’ve been able to apply my experience and education to give someone the gift of hearing once again."

cassie iliff

Cassie Iliff, Au.D.

Cassie Iliff, Au.D is a Colorado native and Doctor of Audiology. She grew up near rural Yuma, CO on a cattle ranch. Dr. Iliff received her Bachelor of Arts degree in Communication Disorders and Doctor of Audiology Degree from the University of Northern Colorado in Greeley. Her specialties include tinnitus management, hearing protection, extended-wear Lyric fittings, and advanced hearing aid programming. After Dr. Iliff graduated with her doctorate, she has had a variety of professional experiences. She began her career as the winner of the James Jerger Award for Excellence in Student Research. Dr. Iliff has worked as a trainer and sales representative for a hearing aid manufacturer, and she has worked as a hearing testing equipment developer. She sees the importance of quality healthcare after growing up in a small town, and it gave her a specific passion for helping people hear. Dr. Iliff looks forward to helping you with your hearing needs with quality, individualized healthcare.

allison groninger

Allison Groninger, P.A.-C

Allison Groninger, PA-C, is a board-certified Physician Assistant who specializes in balance and hearing disorders. She attended Colorado State University and earned her Bachelor of Science in Biochemistry. After that, Allison went to the University of Colorado Anschutz Medical Campus, where she earned her master’s degree in Physician Assistant studies. Allison has prior experience as a nursing assistant and medical assistant, which taught her how important compassion and responsiveness are when dealing with patient concerns. She pursued her degree as a Physician Assistant because she wanted to combine advanced medical knowledge and technical skills with her caregiving background. Allison has worked at Castle Rock Ear Associates for more than four years before she became a provider, developing her passion for treating chronic and acute ear disorders. She enjoys providing quality, patient-centered care and developing relationships with patients. Allison is a Colorado Springs native and enjoys outdoor activities, including running trails and camping with family and friends.

Meet Our Staff



Arianna was raised in Anchorage, Alaska, and moved to Colorado to pursue her college degree. She enjoys the water and was a decorated college swimmer. When not in the water, Arianna likes to stay active, especially outdoors with her dog Mistletoe.



Breanna is a Colorado native who has worked in insurance and billing for eight years. When she is not at work, Breanna wins tabletop games and spoils her corgi.



Samantha grew up in Montana on an Air Force Base, and she recently moved from West Virginia to Colorado to be close to her family and for a new beginning. When she is not working as an Audiology Assistant, Samantha enjoys being outside hiking, camping, and volunteering.




Brittany is a Colorado native who recently moved back to the state after being an Air Force Medic for ten years. In her free time, Brittany enjoys gardening, hiking, and reading. She loves animals and has two cats and one dog, all of which are rescues.



As a Colorado native, Sydney loves to call this state her home. She recently graduated from the University of Denver with her Bachelor of Science in Biological Sciences. In the future, Sydney plans to go to medical school and become a physician. On weekends, she enjoys playing golf, spending time with her close friends, and exploring Colorado.



Born and raised in Ontario, Canada, Lydia has been in Colorado for almost six years. She likes to ice skate and hikes with her partner and small dog Watson. She adopted her mutt Watson from the Humane Society. Lydia is the first person who will tell you what a good Poutine tastes like.



Laney is a South Carolina native who recently got her Bachelor of Science degree in Biological Sciences and a Microbiology minor from Clemson University. In the future, she plans to go to Physician Assistant school. Laney spends her free time running, hiking, and cooking, and she looks forward to exploring Colorado.

Castle Rock Ear Associates

4344 Woodlands Boulevard, Suite 240
Castle Rock, CO 80104

Phone: 720-408-9118

Fax: 720-547-9180


Hours of Operation
Monday: 8:00 AM – 5:00 PM
Tuesday: 8:00 AM – 5:00 PM
Wednesday: 8:00 AM – 5:00 PM
Thursday: 8:00 AM – 5:00 PM
Friday: 8:00 AM – 5:00 PM

Contact Castle Rock Ear Associates Today to Schedule an Appointment