Doctor of Physical Therapy
Haley Gierszal
Front Desk Coordinator
Haley graduated from the University of South Carolina in 2020 with a Bachelor’s Degree in Exercise Science. She has her CF-L1 and has been the early morning CrossFit coach at Carolina CrossFit for a year and a half. She is also certified in CrossFit Gymnastics.
Haley is passionate about competitive CrossFit and makes frequent showings to local competitions around the state and has even competed at some larger competitions such as Wodapalooza.
When she is not coaching, working, or training, Haley likes to relax with her boyfriend, Bobby and their two cats, Encie and Wayne.
cayce@vertexpt.com
803.973.0100
Quinton McQueen
Front Desk Coordinator
Quinton is from Spartanburg South Carolina, and is pursuing his undergrad in 
Mechanical engineering. He has his CF-L1 and coaches Saturday classes at Carolina CrossFit. He is passionate about spending time with his dog Cashew, competing in local CrossFit competitions, and Elton John’s music.
cayce@vertexpt.com
803.973.0100
Dr. Mara Argyriou
PT, DPT, CSCS
Mara grew up in Limassol, Cyprus – a small island in the Mediterranean. She started playing tennis at the age of five and competed on the international junior tennis tour and the Cyprus Fed Cup team before moving to the States to play Division I tennis for the College of Charleston. In each of her four years she earned CAA All-Conference Team honors and for two consecutive years she was named Team MVP. Mara graduated from CofC in 2017, receiving her Bachelor of Science degree in Exercise Science with magna cum laude. She then earned her Doctor of Physical Therapy degree from the University of North Carolina at Chapel Hill in 2020.
Mara is a Certified Strength and Conditioning Specialist through the National Strength and Conditioning Association, and is passionate about injury prevention and performance. She enjoys working with athletes and active individuals of all ages with the goal to not only return to sport/activity but to enhance performance and quality of life.
Within the last few years Mara took a strong interest in long-distance running and began training and competing in marathons. In her spare time, she enjoys spending time with her boyfriend, Tom, and their dog, Chuck. They particularly enjoy taking Chuck swimming and paddleboarding. Yes, Chuck is a pro paddleboarder!
mara.argyriou@vertexpt.com
803.973.0100
Dr. Aimee Depelteau
PT, DPT, OCS, CSCS, Pelvic Health Specialist
Aimee grew up in Atlanta, GA, living there for 18 years until moving to Tennessee for both undergraduate and graduate school. She received her B.S. in Rehabilitation Science from the University of Tennessee at Chattanooga and a Doctorate in Physical Therapy from East Tennessee State University. After graduating from physical therapy school, she moved to Lexington, Kentucky where she completed an orthopedic residency program to improve her clinical skills in treating musculoskeletal conditions. During her time in the residency program, Aimee had the opportunity to treat local high school and collegiate athletes, developing a strong interest in treating female athletes.
Aimee has been an athlete her entire life, playing several sports throughout high school and college such as softball, basketball, rowing, soccer, and long distance running. Within the past few years Aimee has taken up a strong interest in fitness sports such as Powerlifting and CrossFit. In addition to specializing in treating female athletes as a physical therapist, Aimee is also a coach for women of all ages through Vertex Performance Training.
Aimee is the oldest of 6 girls, which includes a set of twin sisters and a set of triplet sisters. She enjoys spending time with her family and friends, attending church, enjoying the outdoors, playing the guitar, and cooking. She can be found on social media as @ironladydpt.
aimee.d@vertexpt.com
803.973.0100
Dr. Josh Jeffery
PT, DPT, MS, CSCS
Chief Operating Office
Josh grew up in Cincinnati, Ohio and completed his undergraduate work at the University of Dayton in 2012, graduating with a B.S. in Business Administration. He moved to Columbia, SC in 2013 to begin graduate school at the University of South Carolina, earning a M.S. in Exercise Science in 2015 and his Doctor of Physical Therapy in 2019. He is a Certified Strength and Conditioning Specialist through the NSCA, an OPEX coach and a CrossFit Level 2 trainer.
Josh began his career in the strength and conditioning field and has experience working in multiple settings. He has worked with the athletes at USC, NFL players, Olympic athletes, elite level CrossFitters, weightlifters, powerlifters and everyone in between. As a former college baseball player, Josh enjoys working with throwers and other overhead athletes as they work to get back to their sport. He also enjoys working with functional fitness athletes and has coached Crossfitters to the CrossFit Games, regionals and sanctional events.
In his spare time, Josh enjoys spending time with his wife and their two dogs, traveling the country to teach continuing education courses, and training and competing in CrossFit and weightlifting.
josh@vertexpt.com
803.973.0100
Dr. Brandon Vaughn
PT, DPT, OCS, CSCS, Full Body ART®
Chief Executive Officer
Brandon is the co-owner of Vertex PT Specialists and is a Board Certified Orthopedic Clinical Specialist (OCS). A graduate of The Citadel, he received his Bachelor of Science Degree in Exercise Science in 2007 with high honors. He then completed his graduate work at The University of South Carolina where he earned his Doctor of Physical Therapy in 2010. Brandon furthered his specialized training by earning certifications in Spinal Manipulation and Dry Needling through the American Academy of Manipulative Therapy. He is also an NSCA Certified Strength & Conditioning Specialist (CSCS), is certified in the Functional Movement Screen (FMS), certified in concussion management through the American Institute of Balance, certified Pose Method running technique specialist, and most recently certified Full Body Active Release Technique® certified.
Brandon specializes in combining advanced manual therapy skills with dry needling, functional movement, and mobility restoration. Brandon has utilized these techniques while rehabilitating several world-class athletes including NFL players, Olympians, and CrossFit Games athletes at the highest level.
In his spare time, Brandon enjoys spending time with his wife and two children as well as training and competing in Ironman triathlons and local CrossFit competitions.
brandon@vertexpt.com
803.973.0100