Meet the professionals who combine expertise, empathy, and a genuine commitment to better hearing.

President / Owner
Josh has been part of the audiology field since 1999, beginning his postgraduate clinical work at Parker Hearing under the mentorship of his father, Dr. William Lee Parker. Growing up immersed in the profession, Josh developed an early appreciation for the science and impact of hearing care, which naturally led him to pursue a career in audiology. He earned his Master’s degree in Audiology from California State University, Los Angeles, where he graduated first in his class.
Inspired by his father’s legacy and guided by years of hands-on experience, Josh brings both deep expertise and genuine compassion to his work. He finds the greatest fulfillment in helping patients reconnect with the sounds that matter most and believes that meaningful hearing care starts with listening to each patient’s unique needs. For Josh, no academic achievement compares to the daily reward of improving someone’s ability to hear and engage fully with life.
Co-President / Owner
Andrea is a pediatric audiology specialist with more than 36 years of experience providing high-quality, patient-centered hearing healthcare. She earned her master’s degree in Audiology from California State University, Los Angeles.
Andrea dedicated more than two decades to Palm Springs Hearing Seminars, serving as Director of Logistics for 20 years before becoming Co-President, a role she held until her retirement in 2023. Throughout her tenure, she played a key role in the planning, coordination, and leadership of nationally respected educational programs for hearing healthcare professionals.
Her career reflects a strong foundation in clinical excellence, business operations, and practice management. Andrea’s primary areas of focus include business development within audiology practices and advancing patient-centered approaches to audiology and brain health. She is deeply passionate about supporting exceptional audiological outcomes that enhance overall brain health and quality of life.
Outside of her professional work, Andrea treasures time with her family, grandchildren, friends, and faith. She enjoys staying active through exercise and values the many rewarding experiences that come with a full and balanced life.


Doctor of Audiology
Kim Baldock-Mahloch, AuD, is a board-certified audiologist and licensed hearing aid dispenser with more than 25 years of experience in comprehensive hearing healthcare. She earned her bachelor’s degree from the University of Wisconsin, her master’s degree from California State University, and her Doctor of Audiology degree from the University of Florida. She holds the Certificate of Clinical Competence in Audiology and is a member of the American Speech-Language-Hearing Association and the American Academy of Audiology.
Dr. Mahloch specializes in adult and pediatric hearing evaluations, tinnitus and dizziness assessments, aural rehabilitation, and amplification solutions. Inspired by her father’s experience with profound hearing loss, she is deeply committed to providing compassionate, individualized care tailored to each patient’s needs.
Outside of work, Dr. Mahloch enjoys traveling and spending time outdoors with her husband and three children, with favorite activities including hiking, canyoneering, skiing, boating, and scuba diving.
Doctor of Audiology
Karina Romero is a dedicated audiologist committed to helping individuals improve their hearing health and overall quality of life. She earned her Doctor of Audiology degree from California State University, Los Angeles, where she developed a strong foundation in diagnostic evaluations, evidence-based practice, and patient-centered care. She also holds a bachelor’s degree in child development from the University of La Verne, giving her a unique understanding of communication and developmental needs across all ages.
Karina’s approach to audiology is rooted in compassion and education. She strives to empower patients and their families through guidance and personalized solutions for hearing challenges, with a particular passion for increasing access to hearing healthcare for Spanish-speaking communities. Her professional interests include pediatric audiology, emerging hearing technology, and preventive hearing care.
Outside of the clinic, Karina enjoys caring for her three dogs, exploring her creativity through crafting projects, and discovering new nature trails.


Doctor of Audiology
Lisa Gray is an audiologist dedicated to improving hearing health and overall quality of life through personalized, evidence-based care. She earned her Doctor of Audiology (Au.D.) from California State University, Los Angeles, and her bachelor’s degree from California State University, Dominguez Hills.
At Parker Hearing Institute in Torrance, Lisa provides comprehensive audiological services, including diagnostic evaluations and hearing aid fittings, and is leading the development of the clinic’s cochlear implant program. Her clinical experience includes advanced hearing and balance assessments, electrophysiological testing, and helping patients confidently navigate the process of selecting and adapting to hearing technology.
Outside of the clinic, Lisa enjoys rock climbing, caring for her ever-growing collection of plants, and getting lost in a good audiobook.
Doctor of Audiology
Alyssa Heisen is a dedicated audiologist who provides compassionate, high-quality hearing healthcare with a strong focus on patient-centered care. A South Bay native, she is deeply committed to serving the community she proudly calls home and strives to create a comfortable, welcoming environment for every patient. She is currently developing a specialized program to support patients with cognitive concerns.
Alyssa earned her undergraduate degree from the University of California, Santa Barbara, and her Doctor of Audiology degree from Washington University in St. Louis. With both personal and professional experience using hearing aids, she brings a unique perspective to hearing care and understands firsthand how life-changing amplification can be.
Outside of work, Alyssa enjoys trivia nights with friends and staying connected to music by playing instruments and attending concerts...always with hearing protection, of course.

Don’t wait to reconnect with the world around you. Schedule your consultation today and let our experts guide you toward clearer, more confident communication.
Have questions? Call us at (310) 540-4327 or fill out the form. Our friendly team is here to help you take the next step toward better hearing.
To make an appointment, just click the button below.

Copyright 2026. Parker Hearing Institute. All Rights Reserved.