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Kelsey MacDonald (she/her) is so thrilled to be a part of the FlySpace team. Kelsey is a graduate of Boston Conservatory at Berklee with a BFA in Musical Theatre and an emphasis in Songwriting. When she isn't answering your emails or communicating with your doctors you can find her writing music, picnicing in the park, or perfecting her overnight oats recipe. Having worked with both Marissa and Jessi on a chronic back injury, Kelsey can confidently say that there is no better place to seek physical therapy, especially specific to the performance world, than here at FlySpace! 


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As a NYC-based choreographer, dancer, and teacher for 20+ years, Jessi Patz has taught, choreographed and performed for dance venues, film, theater, and comedy shows all over the world. Jessi utilizes her extensive background in dance and movement to assist performers (and all patients) in building long careers with a deeper understanding of their body/anatomy, pain science, and the importance of maintaining a strong foundation. A passionate Doctor of Physical Therapy, Jessi has also dedicated herself to a lifelong study of Pilates and Rehab. She has worked for Physioarts and Function First PT clinics, as well as provided PT treatment backstage to the Broadway performers and crews of Hamilton, Book Of Mormon, Chicago, Head Over Heels, The Prom, Be More Chill, Aladdin, Mean Girls and has worked with dancers from Mark Morris, Alvin Ailey, American Ballet Theater, Boston Ballet, Nathan Trice, Radio City's The Rockettes, and many more. Jessi hosts workshops and is a frequent guest lecturer to dance students in grade schools and universities, and to Physical Therapy Doctoral Candidates.

"I have not met anyone I trust more with my physical and my emotional well-being than Jessi Patz!"​

– S.W.

"I truly cannot say enough good about Jessi."

- J.D.

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Marissa T. Schaeffer, PT, DPT, CSCS, is a graduate of the SUNY Purchase College Conservatory of Dance and earned her doctorate in physical therapy from Columbia University. She works with the students and company members of Alvin Ailey American Dance Theater, and has worked with Limón Dance Company, HopeBoykinDance, as well as several Broadway shows, including Freestyle Love Supreme. Her expertise covers contemporary dance, ballet, musical theater, jazz, tap, and more. Marissa specializes in identifying issues at the root of a performer’s pain, rehabilitating the injury, and adjusting movement patterns to achieve longevity. Like so many dancers, she has experience with long-term injury, which for her culminated in an extensive back 

surgery and year-long recovery. Marissa strives to help performing artists and athletes—both professional and not— feel confident, comfortable, strong, safe, and respected as they transition quickly from FlySpace back to normal activities. For more information on Marissa, click here.

"Having worked with Marissa as trainer and physical therapist, results is the best word to describe my experience. She is effective, thoughtful and dedicated! Can't recommend her more highly!"​

– J.L.

"Marissa's expertise and winning personality are good for the body and soul."​

– Lynn F.


As a lifelong member of the performing arts community, Ashley Houck, PT, DPT (she/her) brings passion and professionalism to her work at FlySpace Physical Therapy with specialties in dance movement and those with scoliosis. She is trained in jazz, ballet, contemporary, tap, hip-hop, Afro-Caribbean, and house styles.  As a doctor of physical therapy, Ashley has worked backstage for Broadway shows, dance companies, and musicians from The Juilliard School. Ashley has received training from the Barcelona Scoliosis Physical Therapy School and works with individuals to obtain their best 3D posture. She is a graduate of the University of Pittsburgh and Touro College School of Health Sciences and was awarded the Maimonides Award for demonstrating the highest professional ideals of a healthcare professional.  Ashley fosters a safe, inclusive, and transformative space for the folks she cares for and is a partner in her clients' healing and wellness.

"Ashley's comprehensive, compassionate care gave me my life back."

– K.M.

"Ashley is wonderful and incredibly well versed in what she does.  is very difficult to trust others with your body, especially when you experience injuries, but I feel extremely comfortable and safe at FlySpace."

- G.Y.


Ashley Houck, PT, DPT


As a lifelong member of the performing arts community, Ashley brings passion and professionalism to her...

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Marissa Schaeffer, PT, DPT, CSCS


Marissa is a graduate of the SUNY Purchase College Conservatory of Dance and earned her doctorate in physical...

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Jessi Patz, PT, DPT, CKTP


As a NYC-based choreographer, dancer, and teacher for 20+ years, Jessi Patz has taught, choreographed, and performed...

Marissa Schaeffer

Jessi Patz

Ashley Houck