John Brandt

LPO, CPO, Clinical Director

John Brandt is an American Board Certified and Ohio Licensed Prosthetist/Orthotist. He earned his BA in Biology from Wright State University in1990 and a post-graduate Certificate in Orthotics and Prosthetics from Northwestern University in 1991. John has provided prosthetic and orthotic care in the greater Dayton area for over 20 years and is the owner of Optimus Prosthetics. As a prosthetist, he loves working with his hands to create a device that helps people return to an independent life. In his free time, John camps and hikes with his family plays competitive soccer and snowmobiles. 


Sara Goldberg

CP, LP, Clinical Manager

Sara Goldberg is an American Board Certified and Ohio Licensed Prosthetist. Sara earned her BS in Exercise Science and Sports Medicine from California Lutheran University in 2008 and a post-graduate Certificate in Prosthetics from California State University, Dominguez Hills in 2010. Sara pursued a career in the prosthetics field because she felt it was the perfect combination of art, science and helping people. She has a background in physical therapy and uses that experience while working with her patients. Outside of work, Sara enjoys spending time with her family and her 2 dogs, playing board games and exploring the outdoors.


Randy Daniel

Certified Orthotist Prosthetist–Practice Manager

Randy graduated from Lebanon High School in Lebanon, Ohio in 1982. He was involved in several clubs including art and sciences. In his junior year, his best friend was involved in a motorcycle accident which resulted in a loss of his limb below the knee. This was Randy’s introduction to the field of Prosthetics. He took prerequisite courses at Sinclair College then transferred to Shelby State in Memphis, Tennessee. There he obtained his degree and certificate program in Prosthetics and Orthotics in 1987. Randy began his career in Florence, Alabama where he completed his residency. From there he moved back to Ohio so his children could be with their grandparents. He worked at Orpro, a large company in Dayton, Ohio that treats a variety of patients. They include multidiscipline clinics at the Children’s Hospital. After a few years, he took his family south to New Bern, North Carolina where he met Shane Coltrain. He managed that facility for a few years then returned to Ohio due to illness in the family. While there, he was taught the business side of Prosthetics and Orthotics. He managed several offices in the Ohio area with the focus on providing the best possible cost-effective care for their patients. In addition, Randy was very involved in providing education to physician groups, patients and being a mentor in the residency program he helped establish. Teaching has always been an interest in his life and is a great way to give back to the profession.  


Megan Albury


Megan Albury is an American Board Certified and Ohio Licensed Prosthetist/Orthotist.  She earned her BS in Biomedical Engineering from Wright State University in 2006 and a post-graduate Certificate in Prosthetics in 2007 and Orthotics in 2009 from Newington Certificate Program.  After job shadowing her junior year of high school, she knew immediately this was the profession she wanted to pursue.  Outside of work, Megan enjoys being outdoors, crafting, cooking, and spending time with her family. 


Derick Schmidt


Derick Schmidt is an American Board Certified and Ohio Licensed Prosthetist/Orthotist.  He earned his BS in Kinesiology from Pennsylvania State University in 2009 and his Master’s in Prosthetics and Orthotics from the University of Texas Southwestern Medical Center in 2011.  His background and interest in mechanical systems and CAD/CAM, combined with his degree in kinesiology, led him to become a prosthetist.  Derick’s favorite thing about prosthetics is creating unique ideas and solutions that help amputees improve their quality of life.  Outside of work, Derick enjoys spending time outdoors with his wife, Rachel, and their three dogs, as well as doing DIY home and vehicle projects.


Rachel Schmidt


Rachel Schmidt is an American Board Certified and Ohio Licensed Prosthetist.  She earned her BS in Kinesiology from LSU in 2009 and her Master of Prosthetics and Orthotics from UT Southwestern Medical Center in 2011.  After working in Atlanta and Pittsburgh, she joined the Optimus prosthetic team.  Interested in architecture and physical therapy, she was drawn to the field of prosthetics because of the opportunity to combine creativity and design with the rehabilitation process.  She enjoys customizing devices and helping patients of all activity levels accomplish their goals.  Outside of work, Rachel enjoys anything outdoors, road trips, working on home renovation projects, and hanging out with her husband and their 3 dogs.


Amy Yates

LPO, CPO and Patient Advocate

Amy Yates is an American Board Certified and Ohio Licensed Prosthetist.  She earned her BE in Exercise Science from the University of Toledo in 1990 and a post-graduate Certificate in Prosthetics in 1990 and Orthotics in 1993 from Northwestern University.  Amy serves as a Practitioner Patient Advocate for the Dayton office. She is able to answer questions for our patients and their families not only from a clinical perspective but also from personal experience.  


Allison Seim


Allison Seim is an American Board Certified and Ohio Licensed Prosthetist and Orthotist. She earned a B.S. in Biomedical Engineering from The University of Cincinnati in 2014, and a M.S. in Prosthetics and Orthotics from Northwestern University in 2016. Allison pursued a career in prosthetics, because it combined her engineering background and technical mindset while allowing her to help people first-hand. Allison enjoys spending her free time reading, hiking, traveling, and spending time with her friends and family.


Tim Arnold


Tim Arnold is an American Board Certified and Ohio Licensed Orthotist and Prosthetist. He graduated with a Master of Science in Orthotics and Prosthetics from Eastern Michigan University. Tim’s personal experience as an amputee led to his interest and pursuit of prosthetics. Outside of work he enjoys spending time with his wife and 2 kids, being outdoors, hunting, fishing, and mastering the BBQ. 


Andrea Kinsinger

Physical Therapist

Andrea Kinsinger is a licensed Physical Therapist. She received her BS in Physical Therapy in 1986 from Bowling Green State University and the Medical College of Ohio.  Andrea has worked with lower extremity amputee patients throughout her career and loves coaching amputees through the process to return to an independent and active life. She also works with area therapists offering expertise and education in gait biomechanics and rehabilitation to facilitate an optimal outcome for our patients at Optimus. Outside of work, Andrea enjoys life with her husband and 4 children bicycle touring, wilderness canoeing, cooking, gardening and mentoring high school girls. 


Erin McGraw

Certified Prosthetist

Erin McGraw is an American Board Certified and Ohio Licensed Prosthetist. She earned her BS in Exercise Science from Eastern Michigan University in 2016 and MS in Prosthetics and Orthotics from the University of Pittsburgh in 2019. Erin’s enthusiasm for being active lead her to pursue a career in prosthetics to help others do the same and accomplish their goals. She appreciates being able to work with her hands, be creative, and build a special rapport with each patient. Outside of work, Erin enjoys golfing, traveling, hiking, trying out new restaurants, and spending time with family.

Christian Arnold

Prosthetic Resident

Christian Arnold is a board-eligible orthotist and prosthetics resident. Christian earned his BS in Biology from William Penn University in 2018 and MS in Prosthetics and Orthotics from Alabama State University in 2020. Christian is a transtibial amputee and pursued a career in prosthetics to help other amputees achieve their goals. Outside of work, Christian enjoys golfing, fishing, and spending time with his girlfriend.

Samuel Mitchell

Prosthetic Resident

Sam graduated from the University of Cincinnati in 2011 in exercise physiology. He then began work as a technician in orthotics and prosthetics for a short time before attending Northwestern for an orthotics graduate degree. He graduated from Northwestern in 2013 and has been working as a Certified Orthotist since that time. In May 2021 he completed a master's degree in both prosthetics and orthotics from the University of Hartford. He is passionate about continuing his career in prosthetics and working to develop long-lasting relationships with prosthetic patients to provide the best treatment possible.  In his free time, he enjoys spending time with family, friends, and his girlfriend.  Hobbies outside of work include sand volleyball, indoor soccer, and hiking with his dog Murphy.  

Douglas Oaks



Christine Giesting

Community Outreach Coordinator:

Christine graduated from Central Ohio Technical College in 1990 with a major in Physical Therapy. Since then, she has also become a Board of Orthotics Certified Orthotic Fitter as well as an American Board Certified, Ohio Licensed Pedorthised.  It was while working with Pedorthic patients that she realized her interest in Prosthetics. As a Community Outreach Coordinator, her goal is to help transition both the patient and family through their prosthetic journey. Outside of work she enjoys, cooking, gardening, traveling, and spending time with her family.

Anita Curtis

Office Manager

Amanda Doolin

Shared Services/Compliance Manager

Shanda Browning

Medical Biller

Meka Edwards

Authorization Specialist

Maribeth McClure

Compliance/Front Office Specialist/Dayton

Sheila Fiedler

Front Office Specialist/Dayton

Tammy Patton

Accounts Receivable Specialist

Russell Hawkes

Technical Advisor

Jamie Stidham

Prosthetic Technician

Nick Collinsworth

Prosthetic Technician

Chyler Hastings

Prosthetic Technician

Hannah Sherrill

Promotional and Media Coordinator

Carla Printup

Front Office Specialist/Cincinnati

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