Our Staff

Physical Therapists

Greg Mackenzie, Owner and Physical Therapist

Greg was born in Pietermaritzburg, South Africa.  He was raised on a farm in the midlands of Natal, riding horses and was competitive in showjumping, cross country and Dressage. He graduated from Hilton College where he also played rugby, cricket and ran track. He then went on to study for his Bachelor of Science in Physiotherapy at the University of Stellenbosh, near Cape Town and thereafter his Master’s of Sports Science at the University of Natal, Durban.

Greg owned and operated a Sports Medicine clinic, Kings Park Sports Medicine Centre, in South Africa for 14 years. Greg also spent many of these years as the  official Physical Therapist and Trainer for the Natal Sharks Rugby team and the international Springbok Sevens Rugby team. He traveled extensively all over the world, including multiple trips to New Zealand, Australia, Japan, China, Hong Kong, Paris, London, Dubai, Malaysia, Fiji and also many South American countries including Chile, Argentina and Uruguay. He brings to Xcel a wealth of orthopedic, manual and sports physical therapy experience.

After moving to the USA permanently and becoming a US citizen, he gained much experience working in various clinics and hospitals in the greater Dayton area and Indiana. Xcel Sports Medicine was established in 2006, with the core principle being the ‘hands-on’ approach to PT which defines  the philosophy of the clinic. This is the fundamental basis of the clinic’s approach to the management of orthopedic, and sports injuries that constitute the bulk of the patient population at the clinic.

An avid marathon runner, Greg has run in many area races, including the New York, Columbus, Cincinnati Flying Pig, Air Force, and Boston Marathons and he has run the 56 mile Comrades in South Africa 8 times. He enjoys sharing the benefits of this sport with as many people as possible. Greg is married to Celeste, a master Pilates instructor and owner of Peak Personal Pilates. They have 2 grown children; Brett, a graduate of the University of Louisville and competitive swimmer and Sarah, an NYU graduate currently pursuing a career in the arts in New York City.

Andy Schulze

Clinic Director
Anna, OH
Physical Therapist

Andy, of Maria Stein, is a 2004 graduate of Marion Local.  He attended Bowling Green State University for his undergraduate coursework, majoring in Applied Health Science.  Andy graduated from The University of Findlay in 2011 with his Doctorate of Physical Therapy.  He started his physical therapy career as a travel physical therapist, which took him from California to Washington D.C. with several stops in between.  Andy has experience working in various settings and his specialties include orthopedic sports medicine and manual therapy.

Andy’s wife is also a 2011 graduate of UF’s Physical therapy program.  They reside in Anna, Ohio.  Andy enjoys golfing, being outside, and spending time with his wife Lindsay.

Kevin Royce

Clinic Director
Vandalia, OH
Physical Therapist

Kevin was born and raised in Grand Rapids, MI. After attending Central Michigan University for his undergraduate degree in Health Science, he attended the University of Dayton, achieving his Doctor of Physical Therapy in May 2016.

Kevin joined Xcel in June 2016, and brings a passion for both orthopedic and neurological populations. He continues to work on publishing work, utilizing screening tools to predict injury in NBA players, but is also interested in concussions and balance disorders. In his free time, Kevin enjoys running, any outdoor activities, and watching Baltimore Ravens, Detroit Red Wings, and Notre Dame Football.

Christian Lament

Clinic Director
Beavercreek, OH
Physical Therapist

Christian is an Indian Lake native and 2010 graduate of Waynesfield- Goshen High School. He attended Mount St. Joseph University while completing his undergraduate degree in General Studies and then furthered his education as a Doctor of Physical Therapy, completing his degree in May of 2017.

Christian completed a 10 week rotation with Xcel in the spring of 2017 and joined the team of therapists following graduation. He currently continues to live in the Indian Lake area and enjoys outdoor activities such as skiing and hiking. Along with these activities Christian likes to spend time with his friends and family during his spare time.

Kayle Quinter (Smith)

Physical Therapist

Kayle is originally from Piqua, Ohio. She obtained her Bachelors of Science in Allied Health from Otterbein University, where she also played varsity Lacrosse. She then went on to earn her Doctorate of Physical Therapy from Ohio University in May 2017. While at Ohio University, she was very involved with the DPT program’s annual Quad Rugby tournament. This wheelchair rugby tournament raised money for The Buckeye Blitz, an adaptive sports team based out of Columbus for those who had suffered spinal cord injuries.

After graduating from Physical Therapy school, Kayle worked in south central Ohio for two years, primarily in an outpatient orthopedic setting, but also spent time working with neurologic and pediatric populations. She started with Xcel in June 2019, and she and her husband now live in Beavercreek. In her free time, she enjoys spending time with her husband and their dachshund, Apollo.

Carrie Wise

Physical Therapist – Vestibular and Neuro

Carrie was born and raised in Tipp City, Ohio. After graduating from The University of Findlay in 2009, she took time to explore various career opportunities including Cancer research in Boston, MA. Ultimately her passion for neuro-medicine led her to physical therapy. A 2016 graduate from Thomas Jefferson University in Philadelphia, PA, Carrie began her career in acute care. She was exposed to a variety of clinical cases and diagnoses, however her passion has always been with neuro-based rehab.

In 2018, Carrie moved back to Dayton, Ohio where she currently works at Kettering Hospital. She continues to work with a diverse patient clientele in the hospital setting, and is excited to continue her passion with neuro and vestibular pathology at Xcel Sports Medicine.

In her free time, Carrie enjoys triathlons, hiking, and spending time with her family.

Mike Mahan

Physical Therapist

Mike Mahan was raised near St. Paris, OH in Champaign County and has lived in Tipp City since 1979.  He graduated from Miami University and received a Master of Science degree in physical therapy at Duke University in Durham, NC.  He devoted his interests and career in the treatment of young children with developmental disabilities, spending 32 years with the Montgomery County Board of Developmental Disability Services in Dayton as a PT and administrator.  He retired from that program in June 2008, then began working on his second career at XCEL in July 2010.  Mike is married with four daughters.  He enjoys cycling and refereeing youth soccer.

Ashley Harrod

Physical Therapist Assistant

Ashley is a 2001 graduate of Fort Loramie High School. After completing four years in the United States Air Force, Ashley moved back to the local area where she pursued the career path of a PTA. Ashley attended Edison State Community College in Piqua, Ohio and earned her PTA degree in May 2011. In her spare time, Ashley is involved in coaching track-specializing in distance.  Ashley  resides in Fort Loramie, OH with her husband and daughter, Kiera. She enjoys spending time with her family and friends as well as doing Crossfit.

Anna Weni

Physical Therapist Assistant

Anna is a 2013 graduate of Miami East High School. She completed two years at Urbana University, where she played soccer and studied Sociology. Anna then transferred to Grace College in spring of 2015 and continued in Sociology. In fall of 2015, Anna changed directions and decided to pursue becoming a PTA, which landed her at Edison State Community College in Piqua, Ohio. She graduated from the program in May of 2018 and started her career at a skilled nursing facility in Cincinnati until October of 2019, when she joined the Xcel team.

Anna resides in Troy, Ohio with her husband, Nakilee. In her spare time, she can be found taking pictures, on a bicycle, in her garden, or on a soccer pitch with Nakilee, giving back to the game.

Jessica Miller

Physical Therapist Assistant

Jessica has lived in the Tipp City and Troy area almost her entire life, with a few years in Colorado and Florida.

She graduated with her PTA degree in 2006 from Sinclair.

Jessica joined Xcel in November of 2019 and really enjoys working in the outpatient setting. She is also certified in the Delay the Disease program, exercising with Parkinson’s patients.

In her spare time she enjoys spending time hiking, outdoor gardening and hanging out with her husband and two little dogs.

Scott Morris

Physical Therapist Assistant

Scott was born in Springfield and now resides in Miamisburg with his wife and two children. He graduated from Clark State’s PTA program in the Spring of 2018 and joined Xcel in March of 2019.

In his free time, Scott enjoys CrossFit and spending time adventuring with his kids. Scott also enjoys coaching our  agility class for young athletes and improving patients’ movement patterns.

Shae Goubeaux

Physical Therapist Assistant

Shae was born and raised in Russia, Ohio, where she graduated high school in 2017. She received her PTA degree from Rhodes State College in May 2019 and was hired shortly after graduation as a PTA in our Anna clinic. In her free time, Shae enjoys running, spending time with her fiancé, and coaching track and field.

Melissa Mitchell

Physical Therapist

Melissa was raised in Canton, OH but fell in love with the Dayton area while earning her Bachelor’s degree in Biology at The University of Dayton. She graduated in 1996 and went on to obtain her Master’s in Physical Therapy in 1998 and Doctorate of Physical Therapy in 2008, both from Wheeling Jesuit University.She has spent the first part of her physical therapy career in geriatric settings such as Home Health and Extended Care Facilities.

Her passion for physical fitness and sports, including running and CrossFit, is shared with her husband and 2 sons. It was her interests in sports and helping athletes that brought her to Xcel Sports Medicine in 2015.

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Celeste Mackenzie

Pilates Instructor

South African born Celeste Mackenzie studied Classical Ballet from a young age and danced professionally for 12 years in London, and South Africa and briefly in the USA. Celeste achieved Principle status and danced the lead roles in most of the Classical Ballets, Balanchine and many original pieces until her retirement in 1992.

Her Pilates Journey started soon after retirement due to the many injuries she endured throughout her professional career. Celeste studied to become a Pilates instructor and completed her Comprehensive training with Power Pilates in NYC and Chicago. Celeste established her own studio, Peak Personal Pilates in 2002 as well as at her husband’s clinic, Xcel Sports Medicine focusing on Rehab and Functional Pilates.

Do you need physical therapy?