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Practitioner Profiles

Bill Kearney

C.O. / Owner


Office: Riverside

Bill Kearney, C.O. opened Johnson's Orthopedic of Riverside in 1983. He has created a company where customer service and patient care is the trademark of his business. Bill directs and oversees the daily operation of all three offices. He received his education and training in orthotics from Cerritos College, Rancho Los Amigos Hospital and University of California, Los Angeles. He is a member of the American Orthotic and Prosthetic Association, California Orthotic and Prosthetic Association and American Academy of Orthotics and Prosthetics. Bill lectures yearly for the physical therapy department at Loma Linda University on Pediatric Orthotics and Prosthetics. Bill's experience includes providing custom orthotics for patients of all ages. He specializes in pediatric patients with cerebral palsy, spina bifida, osteogensis imperfecta and arthrogyposis.

Andy Lindberg



Office: Riverside, Pomona & Hesperia

Andy Lindberg, CP has over 30 years of experience in the field of O&P, and has been a Certified Prosthetist since 1997. He also spent 12 years with the VA providing the highest level of Prosthetic and Orthotic care to our Veterans.

Certifications Include:

  • ABC Certification

  • C-leg, Geniuum, X2 Microprocessor Knees

  • Propio Micropocessor Foot

  • Pile Microprocessor Knee

Andy brings a dedication and passion to providing the best patient care and we are excited to have him on the team. He'll be joining Hector Ruvalcaba, CP, who has been with Johnson's Orthopedic since 1990, and certified since 2009. Hector brings a dedication and loyalty to his patients that is second to none. You'll be in great hands with these two.

Jan Krzeminski



Office:  Hesperia

Jan Krzeminski, C.O. joined Johnson's Orthopedics in 1997. He is in charge of operations for our Hesperia Office. He began working in the orthotics field in 1976. He received his education and training in orthotics from University of California, Los Angeles and Long Beach VA Hospital. Entering the field he felt great satisfaction designing and developing systems to enhance patient function. Jan continues to develop new types of orthotic designs to work in neurological rehabilitation and is also working with state of the art orthopedic control systems (DBS). These DBS systems enable patients to walk, run and perform functional activities which otherwise would not be obtainable with conventional orthotics. Jan's scope of practice is adult and pediatric custom orthotics. He specializes in patients with spinal cord injury, stroke, partial paralysis, CMT, post polio and traumatic brain injuries.

Kevin Taylor



Office: Pomona & Riverside

Kevin Taylor, CO. joined Johnson's Orthopedic in 1998. He is in charge of operations for our Pomona Office. He began his orthotics career in 1993. He received his degree in Kinesiology from California State University Northridge. He received his orthotics education and training from Northwestern University. Kevin has experience working with pediatric, adult and geriatric patients. He specializes in working with children with cerebral palsy, spina bifida and other neurological conditions providing custom bracing for both the pediatric and adult population.

Melanie Berg

C.O., CPA, CFm


Office: Riverside, Pomona, & Hesperia

Melanie Berg, CO, CPA, CFm joined Johnson's Orthopedic in 2011. She received a BS degree in Physiology from California State University Fresno. Her orthotics and prosthetics education and training were completed at California State University Dominguez Hills. She began working in the field in 2000. Melanie's experience includes working with patients of all ages from pediatrics to adults and geriatrics. Her specialties include cranial helmets for babies with positional plagiocephaly, scoliosis bracing for adolescents and post mastectomy fittings for women. Melanie enjoys educating her patients to help them understand the process that they are going through as well as the benefits that they can expect.


Hector Ruvalcaba



Office: Riverside 

Hector Ruvalcaba, BOCP joined Johnson's Orthopedic in 1990. He has been working in the orthotic and prosthetic field for 31 years. He began his career in a technical position where he trained in fabrication and assembly of orthotic and prosthetic devices. The technical training inspired him to pursue the clinical aspect of the practice and he became BOCP certified in 2007. Hector has experience in orthotics and prosthetics with patients of all ages from pediatrics to adults and geriatrics. He is bilingual and assists our Spanish Speaking patients. *Se habla espanol

Fred Callihan



Office: Riverside

Fred Callahan, CO. joined Johnson's Orthopedics in 1986. He began his career in a technical position as a Bench Technician and Lab Manager. His technical training inspired him to pursue the clinical aspect of the practice. In 2004 he became American Board Certified in Orthotics. Fred's experience includes working with patients of all ages from pediatrics to adults and geriatrics providing a wide range of orthotic services.

Catia Bleck

O&P Clinical Resident


Office: Riverside & Hesperia

After performing excellently for her clinical rotations and externship, Catia is the newest member of our Clinical Team at Johnson's Orthopedic.  She graduated from Loma Linda University in March 2021 with a master's degree in Orthotics and Prosthetics and is working on her 18 month NCOPE Residency with us.

Catia received her bachelor's degree in healthcare Management from DeVry University Pomona in 2015.  She is fluent in English, Portuguese, and Spanish. 

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