The practitioners at Diabo Prosthetics & Orthotics combine nurturing care and professional expertise with our patients to create an orthotic brace or prosthetic limb that will help them conquer life’s daily struggles. To learn more about our compassionate professionals, see their bios below.

Richard Sire, C.P.O.

Richard Sire, C.P.O.

Richard Sire, C.P.O., graduate of Northwestern University in Chicago, has been treating amputees for the past 23 years, specializing in prosthetics for active amputees. He has fit several types of computer knees and designed prostheses that meet the specific needs of each individual. Richard works with amputees of all ages and deficiencies including double and multiple limb amputations as well as congenital deficiencies. He also trained to fit upper extremity myoelectric prosthesis and is one of the few practitioners in the country to fit several I-limb hands. He has also spent the past 22 years with Ohlone College, where he has instructed in the Physical Therapy Assistant program.

Kyle Sullivan, C.O.

Kyle Sullivan, C.O.

Kyle Sullivan, C.O. has been practicing Orthotics in the East Bay for over 10 years. Kyle is our pediatric and spinal specialist. He has been attending weekly orthopedic clinics with Lucille Packard’s Children’s hospital. He also works with various C.C.S clinics in the East Bay, providing custom bracing for the pediatric population. His background encompasses trauma bracing for spinal injuries as well as scoliosis. Kyle has several specialized certifications including: Boston Brace, Charleston, Walk Aide and Phat braces to name a few. Kyle also has an interest in treating patients with complex neurological conditions. Kyle is always eager to take on challenging cases.

Sean Boatright, C.P.

Sean Boatright, C.P.

Sean Boatright is an ABC certified Prosthetist that has been practicing orthotics and prosthetics in the East Bay for over 10 years. He continues to provide exceptional care for a variety of patient populations. He has been at the forefront of 3D scanning for custom prosthetic and orthotic devices and continues his education to stay up to date with emerging technologies. Sean approaches everyday as an opportunity to make a positive impact on his patients lives. Sean currently is seeing patients in our Berkeley and Walnut Creek locations. Outside of the clinic, Sean looks forward to traveling with his wife, BBQing and landscaping.

Patrick Crowley, C.P.O.

Patrick Crowley, C.P.O.

Patrick Crowley, C.P.O. has been working as an O & P professional for the past 17 years, splitting his time between the Bay Area & the Central Valley. Pat received his orthotic training at Northwestern University in 1999 & his prosthetic training in Newington, Connecticut, a hospital based program, in 2007. Pat is a C.C.S. paneled provider and has provided pediatric services to local clinics throughout his career. He is certified in the majority of all of the new technologies out today. Mr. Crowley is now managing our Antioch office while still maintaining C.C.S. Clinics in the Central Valley. Pat is a professional that enjoys treating patients of all ages & disabilities to help them restore a more functional quality of life.

Jack Soulis C.P.O.

Jack Soulis C.P.O.

Mr. Soulis started his career in orthotics and prosthetics in 2010 by working as a technician and assisting with patient care in the Department of Rehabilitation Services at the University of California Los Angeles. He then proceeded to the California State University Dominguez Hills Orthotic and Prosthetic Program, graduating with a Master’s of Science in 2015. Prior to his matriculation from CSUDH, Mr. Soulis’ research, “Utilizing Pattern Recognition to Improve Myoelectric Control: A Case Study” was published in the Academy Today.

Jack relocated to Northern California and began working with Diablo P&O in 2021. Before joining the company, Jack’s practice included orthotic and prosthetic care for clients of California’s Children’s Services at many medical treatment units throughout Los Angeles. Moreover, he was a privileged practitioner able to participate in many of the clinics of Children’s Hospital Los Angeles. In addition to his clinical practice, Mr. Soulis has served as a part-time instructor of orthotic and prosthetic theories for the California State University Long Beach Physical Therapy program and has also been a guest lecturer at West Coast University Center for Graduate Studies.

Kathleen M. Pelz, C.O.

Kathleen M. Pelz, C.O.

Kathleen Pelz, C.O. is our lower extremity orthotic specialist. She has worked for over 20 years in this field, with extensive experience in foot and ankle conditions. Kathleen works closely with local Orthopedic Surgeons and Podiatrists to provide comprehensive care for their patients. Kathleen is certified in scoliosis bracing as well as the newest technology including stance control knee componentry. Kathleen’s specialty involves brace design for management of challenges due to Trauma, pediatric or congenital pathologies, neurological and sport injury conditions. As a Walk Aide certified practitioner she is able to offer the state of the art technology for drop foot.

Matthew Chen, C.O.

Certified Orthotist and Board eligible Prosthetist