Meet Our Team

Greg Doerr, Owner, CPO, LP

Greg Doerr is one of the initial founders and owners of Premier Prosthetics. With over 20 years of healthcare and prosthetic experience, Greg and our other owner Manny have worked together for 18 years developing a strong professional relationship and friendship. Greg attended college at the University of Missouri Columbia where he received his Bachelors of Science. He then completed the Prosthetics Program at Northwestern University Medical School in Chicago, IL. Greg is an American Board Certified Prosthetist, a member of AOPA, and a member and supporter of Big Brothers Big Sisters of Eastern Missouri. “I love that I get to help people walk again. I love having the opportunity to not only help my patients, but to meet their families and become a part of their lives. At the end of my career, I will remember the moments I helped influence and was lucky to be a part of; a bride walking down the aisle, a father walking his Prom Queen across the football field, and a 9 year old gymnast winning top honors at her competition. These moments are why I chose to become a Practitioner.”

Manny Rivera, Owner, CP

Manny Rivera is one of the initial founders and owners of Premier Prosthetics. His friendship with Greg and experience in the prosthetics and healthcare industry both span 18 years. Manny graduated from the University of Illinois-Champaign-Urbana in 1998 with a Bachelor of Science degree in Biomechanics. His prosthetic training was completed in 2001 at the University of Northwestern Medical School in Chicago-NUPOC. Manny is an American Board Certified Orthotist and Prosthetist, a member of AOPA and OPGA and has provided his knowledge in prosthetics as an expert witness for local law offices. Manny is proud of the fact that Premier is able to provide a turnkey process for our referral sources and patients. “I get the most enjoyment from having a direct impact on the patients’ quality of life. Being able to see them regain their independence is priceless.”

Matt Ruengert, CP, LP, Cped

Matt joined the Premier Prosthetics team in June 2013, and has been practicing prosthetics locally since 2006. As a St. Louis native, Matt received his education from the University of Missouri-St. Louis with a degree in Biology, and then he attended the University of Connecticut to receive his degree in Prosthetics. Matt is an ABC certified prosthetist and pedorthotist, who regularly attends conferences to gain knowledge on the latest technology in the prosthetic field. He enjoys working with patients and hearing their story, in order to gain a better understanding of their needs and goals. Matt is a member of AOPA, OPGA, and also serves as a Board Member for DASA (Disabled Athletes Sports Association.)

Brad Wanko, CP

Brad Wanko is an ABC Certified Prosthetist. Brad joined the Premier Prosthetics team in May 2015 as a prosthetic technician. He then pursued a career as a prosthetic practitioner and graduated with his Master in Orthotics and Prosthetics from Northwestern University in 2018.

Brad is committed to learning, understanding and applying the latest technologies for the benefit of the patient. He has volunteered with many organizations, including Go Baby Go! DASA, American Academy of Orthotics and Prosthetics as student ambassador. He is also an active member of VFW Auxiliary.

Richard Doerr, CFO

Richard serves as our company’s Chief Financial Officer. A now retired automotive executive, Richard’s desire to improve our company processes makes him a key part of the team. Richard obtained his Master of Science in Engineering Management from Missouri University of Science and Technology, and he has used his expertise and knowledge to design our facility with the techniques he mastered in the automotive industry. By utilizing the applications of lean manufacturing, Six Sigma, and 5S, Richard has positioned Premier Prosthetics as a benchmark leader in the Prosthetic Industry.

Thomas Bankston, Prosthetic & Orthotic Assistant

Thomas attended Baylor University from 2002 to 2007 where he graduated with a BBA in Business Management and a Minor in Biology. Thomas has over 16 years experience fitting shoes and orthotics for people with foot pain and ailments. He has over 7 years experience in the medical field assisting in patient care and treatment. Thomas enjoys the social interaction with the patients and helping them achieve and maintain their independence in daily living. He couldn't ask to be part of a better company than Premier P&O.

John Runde, Prosthetist Assistant

John joined our team in 2019. He attended Saint Louis University from 2009 to 2014 where he graduated with a Bachelor’s Degree in Exercise Science and a Master’s Degree in Athletic Training. John has over 5 years of experience in the medical field assisting in patient care and treatment. He loves providing quality patient care allowing patients to regain their independence.

Dave Liebich, Prosthetist Assistant

Dave joined the Premier Prosthetics team in December 2018. He attended Missouri State University where he graduated with a BS in Health and Wellness. He has 12 years of experience in the medical field, including 7 years in mental health and 3 in EMS. Dave enjoys interacting with Patients, getting to know them, and helping them achieve their goals.

Tom, Production Manager

Tom has been with Premier Prosthetics for over 6 years, and brings over 20 years of industry experience. As a Registered Prosthetic Technician, Tom is able to use his creativity to produce works of art. The motivation behind each prosthesis Tom fabricates is the patient’s desire to live life to the fullest. Tom serves as a leader in the production shop and enjoys being able to customize and manufacture artificial limbs for our patients.

Amy, Billing Manager

Amy joined the Premier Prosthetics team in April of 2018. She is accompanied by 12 years of billing experience within the prosthetics industry and customer service skills since she was 16. While directly working with insurance companies, Amy has every patient’s best interest in mind to ensure each patient receives the benefits and care they deserve. Her hard-work, determination, and outgoing personality keeps Premier Prosthetics an efficient and enjoyable workplace.


Christy joined the Premier Prosthetics team in July 2016. She brings with her over 20 years of experience in customer service, and over 9 years of experience in Healthcare. As an Administrative Assistant to our Practitioners, Christy also emphasizes patient care and patient experience. Christy works with insurance companies verifying benefits as well as directly with our patients and physician’s offices to ensure an efficient prosthetic process. Seeing our patients regain a measure of their independence motivates Christy to do her best for them. She is an active member of the VFW Auxiliary.

DeVonne, Business Manager

After working with Premier in a consulting capacity for nearly 10 years, DeVonne joined the organization in January 2019.

With over 20 years of expertise providing leadership development, human resources, business. operations management, talent and performance management, she is dedicated to guiding a culture that believes people are your most valued asset.

She is focused on providing the resources and environment that allow our talented professionals to continue to deliver patient care that differentiates us as the benchmark leader in the Prosthetic Industry.

Angie, Administrative Assistant

Angie joined the Premier Prosthetics family in February of 2019. She is a graduate of Fontbonne University with a degree in Special Education. As an Administrative Assistant in the office, Angie welcomes the challenge of learning new strategies to elevate patient care. Her dedication to patient success, coupled with a background in education makes her a great resource for our patients and practitioners.

Premier Prosthetics And Orthotics LLC

343 S. Kirkwood Road,

Suite 200,

Saint Louis, MO 63122

Phone. 314-262-8900