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OSOS Physical Therapy Staff

Niel Visser, PT, DPT
Physical Therapist

Niel Visser was born and raised in South Africa. From a young age he was passionate about sports, and excelled in rugby, track and field, tennis and surfing. His love of sports, and a sustained back injury, would introduce him to physical therapy and lead him to pursue it as a career. After two years in the military and a gap year in Europe, Niel enrolled at the University of Stellenbosch, graduating in 1994 with a Bachelor of Science in Physiotherapy. Seizing an opportunity to work and travel, Niel came to the USA in 1995, and worked in various settings across the country as a PRN therapist. He gained experience working in in-patient rehab facilities, acute/sub-acute care, nursing homes, home health, outpatient orthopedics, sports medicine and work hardening. In 1999 Niel took a position in Spartanburg and became the clinical area coordinator overseeing four outpatient facilities. He co-founded Advanced Therapy Solutions, Inc. in April of 2003 and, with his business partner, Dillen Hartley, has seen their business grow from one clinic and two staff members to 5 locations and 50 employees. Niel received the Butch Buchanan Award for Clinical Excellence from SCAPTA in 2007, in recognition of his contributions and outstanding performance in the practice of physical therapy. In 2014 Niel completed his Doctorate in Physical Therapy with emphasis on Executive Practice Management through Evidence In Motion. He and his team also received the Faculty Favorite Award in the Business Plan Competition. Niel has a special interest in treating spine patients pre- and post-operatively, as well as sports injuries. He enjoys staying up to date on the latest therapy related research. When he is not at work, Niel enjoys playing racquetball, hanging out with family and friends, and following his favorite sports teams.


Danni Moss, PT, DPT
Physical Therapist

Danni Moss graduated with a Biology degree from Wofford College in 2004. She received a Masters in Rehabilitation Science Physical Therapy from MUSC in 2007. In 2012 Danni graduated with a Doctorate of Physical Therapy from Shenandoah University. She has been with ATS since 2007, working in her preferred outpatient clinic environment. She enjoys treating knees, shoulders and hips. Danni loves working with young female athletes as well as with geriatric post-op patients. In addition to her role as physical therapist with ATS, she is also the head coach of a competitive gymnastics team in a family owned business, working with gymnasts ages four to eighteen. Danni is a professional member of USA Gymnastics and is Safety Certified through USA Gymnastics. When she can fit it in, Danni enjoys spending time with friends and family tailgating and going to the lake.


Ranee Martin, PTA
Physical Therapist Assistant

Ranee Martin graduated as a Physical Therapy Assistant from the Greenville Technical College in 1996. She worked for Charlotte Institute of Rehabilitation at both Cleveland Regional Hospital, and Kings Mountain Hospital in North Carolina. Ranee has experience in inpatient and outpatient care, with an emphasis on wound care. At Kings Mountain Hospital she assisted in the establishment of a wound care protocol. Ranee spent eight years working in different settings in Upstate South Carolina, including home health, nursing home facilities, and outpatient clinics, concentrating on post-operative orthopedics. Early in 2006 she joined the team at ATS. Ranee enjoys the outdoors, and loves crafting and hanging out with her family.