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.)

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.

Tom, Lead Technician

Tom has worked for Premier Prosthetics for over two years, and he has been in the industry for over 18 years. 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.

Christy, Front Office Admin

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 for our front office, 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.


Marquitta joined Premier's team in September 2017. With eleven years of experience in the healthcare industry and a recent bachelor's degree in Business Administration in Healthcare, she brings knowledge and experience to all aspects of front office operations. She is enjoying learning about the specifics of prosthetic care and has hopes of one day earning her master's degree in Business Administration in Healthcare.
Marquitta is eager to be a part of helping every client receive care that makes them feel comfortable and at ease. Her friendly personality, enjoyment helping others and willingness to support Premier Prosthetics in running smoothly make her a welcome addition to our staff.


Brad joined the Premier Prosthetics team in 2015 as a prosthetic technician. Born and raised in St. Louis he has been in the healthcare industry for over 8 years. Brad received his undergraduate degree from Lindenwood University St. Charles where he received his bachelors in Biological Science. He successfully attended Northwestern’s Masters in Orthotics and Prosthetics program in Chicago in 2016 and graduated in 2018.

Currently working on his prosthetic residency at Premier, Brad plans to learn the day to day clinical aspect of the profession and how to best serve patients. He loves providing quality patient care allowing patients to regain their prior independence. Brad is a member of the AAOP student ambassador program, a Go Baby Go volunteer and a Disabled Athletes Association volunteer.


Adam is one of Premier Prosthetics’ newer team members, but he comes to us with 12 years of experience in the healthcare industry. He works in our fabrication department as a technician supporting our lead technician with prosthetic construction and assembly. He is enjoying furthering his skills related to all aspects of prosthesis fabrication.

Adam attended the University of Missouri‐St. Louis graduating in 2015 with a Criminal Justice degree. He is a member of the Pi Kappa Alpha Fraternity, enjoys reading, landscaping and taking care of his three dogs.

It is rewarding for Adam to use his abilities to help others reach their ambulatory goals.

Premier Prosthetics And Orthotics LLC

343 S. Kirkwood Road,

Suite 200,

Saint Louis, MO 63122

Phone. 314-262-8900