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About Our Staff

  Daniel J. Newton, CP, President   Certified Prosthetist/Orthotist

For 36 years, Daniel J. Newton has served the communities of Bakersfield and the Central Coast by providing high-quality and compassionate medical care to patients in need of prosthetic and orthotic services.

In 1978, Daniel and David A. Wegner, CPO, co-founded Achilles Prosthetics and Orthotics, Inc., in Bakersfield, CA. Two years later they expanded the business by starting a second office in Santa Maria to serve the orthopedic needs of the Central California Coast. In 2008, the pair continued to develop the reach of Achilles, opening a third office in San Luis Obispo.

Daniel attended UCLA, earning a bachelor’s degree in zoology in 1975. Immediately after graduation, he enrolled in the prosthetics and orthotics program at the UCLA School of Medicine. In 1978, he was certified by the American Board for Certification in Orthotics, Prosthetics and Pedorthics. Most recently, Daniel became a Fellow of the American Academy of Prosthetics and Orthotics.

In addition to overseeing the strategic planning and daily operations for all of the Achilles clinics, Daniel’s love for children has drawn him to concentrate on pediatric orthotics, specifically for children suffering from cerebral palsy.  "It's a very humbling experience working with disabled children, but at the same time, I can think of no greater reward than helping a child gain their mobility."


  Logan Newton, CP/ BOCO, Vice President   Certified Prosthetist/Orthotist

Logan Newton has worked at Achilles Prosthetics and Orthotics , Inc. since 2004. He is a second-generation prosthetist, following in the footsteps of his father Daniel Newton, CP, and uncle Donald Newton, CPO, since childhood.

Logan started his professional career as an O&P technician, focusing on fabricating and constructing above-knee, below-knee and upper-extremity prosthetics. After deciding to pursue the career path, he studied prosthetics and orthotics at California State University Dominguez Hills. In 2007, he received his bachelor’s degree in health science with honors, an emphasis in prosthetics, and a certificate in orthotics. After completing formal education, he apprenticed under David A. Wegner, furthering his expertise in prosthetic care.

Logan's mission is to treat each patient as an individual, helping them achieve their maximum potential through the use of the latest technology and techniques. His commitment to care for his patients has been forged by his personal experiences and values. “When I began thinking about what I wanted to do for a career, I knew I wanted to do something that blended artistic and technical proficiency with the chance to help people in need,” Logan said. “Our field is truly amazing. I mean, I have the ability to build an artificial limb that gives someone the chance to walk again or a brace that helps relieves pain. There’s nothing better than going to work every day knowing I’m going to make a difference in someone’s life.”

Outside of work, Logan is active in the Bakersfield community. For the past four years, he has organized a Tuesday night homeless ministry in conjunction with the Bakersfield Rescue Mission.


 Nathan Whiting, CPO   Certified Prosthetist/Orthotist

Nathan Whiting started working for Achilles Prosthetics and Orthotics, Inc. in 2012 as a resident in orthotics and prosthetics and became a Certified Prosthotist and Orthotist in 2018.  In the short time that he has been here, he has brought a strong and knowledgable personality that makes this company more complete to bringing patients quality and caring services. "I consider myself a perpetual student, constantly learning and taking in information. Through my career, I will strive for more complete patient care, and I will hold myself to the highest standards in our industry."

Nathan attended California State University Bakersfield to receive his bachelor's degree in Liberal Studies, with a concentration in liberal science. He decided to pursue a career in science, and so he attended graduate school at California State University Dominguez Hills, and he graduated in 2012.

In his spare time, Nathan's favorite hobby is road cycling. He also has encouraged a men's bible study group to go to the rescue mission to lend helping hands on Tuesday nights. Currently, he and his wife lead a couples' bible study group.



  Rachel Quezada, CMF   Office Manager

In 1997, Rachel Quezada joined Achilles Prosthetics and Orthotics as a receptionist and eventually progressed to office manager. Rachel’s enthusiasm for the medical field began when she was just 15 through a student program provided by her high school. As she’s advanced in her career, her passion to serve others has continued to grow.

Rachel works closely with patients and their families to assist them in the navigation and understanding of insurance coverage for their specific treatment. Her patient and reassuring manner has served as a calming presence for her patients and their loved ones alike.

Although she was born in Los Angeles, Rachel has lived most of her life in Bakersfield. Outside of work, Rachel loves sports, reading, painting, and the company of her family and friends. 




  David Wegner, CPO   Certified Prosthetist/Orthotist

David A. Wegner is the co-founder of Achilles Prosthetics and Orthotics, Inc. An American Board for Certification certified Orthotist and Prosthetist, David completed his education at UCLA in 1977 and has more than 40 years of experience in the field – most of which has been at Achilles.

While serving in the Vietnam War, Wegner sustained a severe combat injury. Through that experience, he decided to pursue a career in the field of orthotics and prosthetics. “My injury in Vietnam really was the catalyst in leading me to get into the field of orthotics and prosthetics. After my injury, I relied a great deal on those around me. Every day, I live for the opportunity to help others in need.”

Wegner has experience serving both children and adults, while also working closely with Medicare, Veterans Administration, Medi-Cal, California Children’s Services and private patients.


  Donald F. Newton, CPO   Certified Prosthetist/Orthotist


  Zak Malzhan, CP   Certified Prosthetist

Zak has been around prosthetics as far as he can remember since his dad is an above knee amputee from way before Zak was born. Zak shares, “I was always fascinated with the prosthesis and enjoyed testing out ways to make my dad’s prosthesis better and more comfortable since I was a kid”.  Zak was raised in Paso Robles, where he graduated from Paso Robles High School. Zak attended Hancock College and worked part time in our Santa Maria Achilles office prior to leaving for more school. Zak attended Sonoma State and finished his grad school at CSU Dominguez Hills before returning to Sonoma County for his residency in Petaluma, CA. In 2004, he moved back to San Luis Obispo County and came back to Achilles Prosthetics to provide custom care as a Certified Prosthetist and Orthotist in both our San Luis Obispo and Templeton office locations.

"Being raised in the North County community, my passion is to bring the highest level of care and technology to our local amputees and orthotic users", explains Zac.

When not crafting prosthetics and orthotics, you will often find him enjoying time with friends and family with big barbeques and motorcycle rides.


Jerry Hartmann, CPO   Certified Prosthetist/Orthotist

Jerry was born and raised on the Central Coast and has successfully cared for amputee and physically challenged patients for 35 years. 

Jerry comes to our team as a seasoned professional.  Many of you are already familiar with Jerry in his previous role as the Clinical Director of a prosthetics and orthotics office in Santa Maria for 11 years.

Jerry first found interest in patient care through his uncle who began his craft treating patients during WWII. Jerry was fortunate to work side by side with him a short time after he left the Marines with honors. For Jerry, it is simple; “Helping patients achieve their new physical goals - physical independence, healing and gaining a more fulfilling life - is something I love” Notes Jerry. “My patients inspire me every day with their courage and determination.”

Outside of work, Jerry enjoys his time with his four children ranging in ages from 13 yrs. To 28 yrs. His latest venture is learning to ride the unicycle with his 3 youngest children. You will often find him riding his bike, hiking, camping, and recreational swimming. His favorite places to travel are Hawaii and Mexico, where he is working on his long term goal of becoming fluent in Spanish.


Christian “Chris” Meier, CPO

Chris grew up in Denver, CO. and received his undergraduate BA from the University of Colorado, Boulder majoring in Integrative Physiology.  After graduating from CU Boulder, Chris attended and received his post graduate degree in Prosthetics and Orthotics from California State University, Dominguez Hills. He has been a practicing CPO since 2011 and specializes in upper extremity prosthetics.

Chris first developed an interest in the prosthetics and orthotics field from his father who was a physical medicine and rehabilitation doctor who specialized in amputee rehabilitation. “I saw a career in orthotics and prosthetics as a way to give back to the community. I get inspired helping to restore function to those patients who have lost it” says Chris.

When not caring for patients, you will often find Chris enjoying his time going on short road trips and hiking with his wife Ana Carmina.


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