Staff Bios

Roberts Physical Therapy Bios

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Brett Roberts

Doctor of Physical Therapy
Brett Roberts, DPT, is the President of Roberts Physical Therapy and Inertia Solutions. Dr. Roberts received a Doctor of Physical Therapy from Evidence in Motion in 2011, a Master of Physical Therapy from the University of Wisconsin-Madison in 2002, and a Bachelor of Arts in Biology from Augustana College in 2000.

Dr. Roberts was one of the first physical therapists in the state who pursued advanced training in the technique of trigger point dry needling (TDN) from Kinetacore. TDN is a technique that assists patients in overcoming chronic trigger points that feed into conditions such as low back pain and neck pain. Dr. Roberts has also pursued advanced training in the manual medicine track at Michigan State University-College of Osteopathic Medicine. Additionally, he has pursued training in aquatic therapy, industrial ergonomics, and various sports medicine techniques.

Professionally, Dr. Roberts serves as the Legislative Committee Chair for the Wisconsin Physical Therapy Association (WPTA). He also served as the Chair for the WPTA Private Practice Special Interest Group from 2015-2018. In 2010, he was named an ‘Emerging Leader’ by the American Physical Therapy Association (APTA). Dr. Roberts is also a member of the Private Practice Section of APTA.

Dr. Roberts is also one of the founding members of Kinexcare. Kinexcare is changing the conversation about muscular-skeletal health care. They are bypassing the complexity and cost of traditional medical models by building a trusted and affordable alternative delivery system that includes prevention, primary Physical Therapy care, rehabilitation and more. Whether you're at home, work, school or traveling, we provide convenient access to cost-effective, world-class services and that is worth talking about!

When not helping patients to maximize their ability to move, Brett enjoys spending time with his wife, Becky, and daughters, Grace and Kaelyn. He is a weekend warrior who enjoys bike riding, auto racing, contact sports, and cheering on the Badgers. Go Bucky! Since 2015, Dr. Roberts has ridden annually across the state of Iowa on his bicycle. RAGBRAI and other distance biking events help Dr. Roberts to “Get Moving, Keep Moving, and Enjoy Life”!

Jacob Brenner

 Doctor of Physical Therapy


Jacob joined our practice in May of 2020. Dr. Brenner is a 2020 graduate of Concordia University St. Paul Physical Therapy program. He graduated from the University of Wisconsin – Stevens Point, with a degree in Health Science in 2017.

He has particular interest in working with those who have difficulties with balance, knee, hip, low back, and shoulder pain. He also enjoys sports rehabilitation, whether the high school athlete or weekend warrior athlete and getting them back to the activities they enjoy. 

When not found in the clinic he enjoys spending time with family and friends. During the non-winter months, you will almost certainly find him spending his free time on a body of water either boating, fishing, or swimming.

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Devin Mattson

Doctor of Physical Therapy
Dr. Devin Mattson originally joined the practice in April of 2018 and rejoined again in August 2021. Dr. Mattson originally started his professional career as an Athletic Trainer graduating from UW - Stevens Point in 2011. After working in multiple settings as an Athletic Trainer it was time for him to focus on his true passion which was clinical care of the patients/clients that he served. It was at this time that he knew the pursuit of becoming a Physical Therapist was his calling. He attended UW - La Crosse for the Doctor of Physical Therapy program and graduated in 2018 with a return back to central Wisconsin.

His true interest as a physical therapist is to get to know his patients on an individual basis and develop a long-standing relationship with them and the community in which he serves. He has a strong interest in treating all musculoskeletal conditions and have additional training and specialization in the treatment of vestibular disorders along with concussions. Dr. Mattson also has a strong interest in working with patients with neuromuscular disorders ranging from spinal cord injuries, traumatic brain injuries, multiple sclerosis, Parkinson's disease, and cerebral vascular accidents (stroke).

When not treating patients in the clinic, Dr. Mattson has a strong interest in hunting and fishing, along with basically anything outdoor related. Dr. Mattson enjoys spending time with his wife (Nicole) and three children, Owen, Kinley, and Hattie. He enjoys working with his hands on both yardwork related jobs and projects around the house. There is something to be said about working hard and taking a step back to recognize what you accomplished. Dr. Mattson looks forward to being able to serve the Plainfield community and build long standing relationships with those in which he meets.

Nathan Brown

DPT, OCS
Nathan is an outpatient physical therapist at Roberts and Associates Physical Therapy. Nathan is originally from Sheboygan Falls, WI, and attended the University of Wisconsin - Madison where he obtained his bachelor’s degree in Kinesiology in 2013. Following graduation, Nathan married his wife, Jana, and they moved to the east coast while he attended the University of Delaware. He graduated with a master’s degree in Anatomy and Clinical Health Sciences and a doctorate in Physical Therapy in 2016. 


Since beginning practice, he has dedicated himself to further education and specialization in the physical therapy profession. He is a Board Certified Orthopedic Clinical Specialist and obtained his OCS in 2021. Nathan is also certified by the Movement Performance Institute in movement, gait, and running evaluation and treatment. Nathan enjoys working with all orthopedic and sports-related injuries, with a particular interest in working with runners. In addition to his expertise in sports injuries, his unique skill set also includes the treatment of vestibular dysfunction and vertigo. 


Nathan also has a passion for investing in physical therapy education and has served as a Clinical Instructor since 2018. Currently Nathan is attending UWSP to obtain an Ed.D. in Educational Sustainability to continue educating future physical therapists.


Nathan is also a Senior Contributor for Doctors of Running (doctorsofrunning.com), a group of Doctors of Physical Therapy who produce running shoe reviews and articles on running gait, rehabilitation, and injury prevention. He enjoys delving into the latest evidence-based training techniques to improve running performance and remaining healthy in his spare time. 


Nathan enjoys spending time with his wife, Jana, and their sons, Henry, and Raymond. In his free time, he enjoys running, hiking, playing board games, and watching the Badgers, Bucks, and Packers (and The Office). 

Heather Carter

Chief Operations Officer
Heather joined our practice in June of 2017. She is a 2012 graduate from the University of Wisconsin–Milwaukee with a Bachelor of Business Administration Degree in Marketing. She also has a Minor in Journalism and Mass Media Communication with an emphasis in Strategic Communication. Heather brings to the practice eight years of knowledge and experience in human resources and recruiting.  In 2022 Heather became our Chief Operations Officer which was a well deserved honor due to her hard work and care for our patients and offices. 

In addition, she is the President of the Stevens Point Area Human Resource Association and has sat on the board for three terms prior as the Secretary and President-Elect. She is also a graduate of the 2017-2018 Leadership of Portage County class.

Outside of the practice, Heather enjoys spending time with her husband, Donald, children Evelyn, Malaya, and Brekken, and living a healthy lifestyle through good diet, exercise, and laughter.

Michelle Carlson-Waggoner

Centralized Benefit Coordinator
Michelle is our Centralized Benefit Coordinator and assists with all scheduling and insurance benefit verification for all our clinic location. Michelle joined our practice in December 2021 and brings a great deal of insurance knowledge to the practice. Outside of the clinic, Michelle enjoys spending time with her husband, bowling, golfing, and kayaking. 

You may reach Michelle at (715) 245-5773

Sharon Bannach

Patient Care Coordinator

Sharon joined our practice in September of 2017. She is our patient care coordinator in our Amherst clinic. During her off time, Sharon enjoys bowling, golfing, and looking for treasures such as hand-thrown pottery and artwork.


You may reach Sharon at our Amherst clinic at (715) 803-7617.

Brandy Footit

Billing Specialist

Brandy joined our practice in February of 2018. Outside of the clinic, Brandy enjoys spending time with her husband, Wayne. On Brandy’s spare time she lets her creative juices flow while refurbishing furniture and antique shopping.


You may reach Brandy at our Plainfield clinic at (715) 803-7617.

Karen Piper

Patient Care Coordinator 

Karen joined our practice in January 2023 and is our Patient Care Coordinator at our Wisconsin Rapids clinic. When not in the clinic, Karen enjoys long walks and tries to get in two to three miles each day. She has proudly lost 100 pounds by walking is an activate for moving your body. While not walking, she enjoys crafts, specifically completing crystal paints. Karen has two daughters and one grandson who she spends her free time with. She is an avid traveler and has traveled to 47 of the 50 states. 


You may reach Karen at our Wisconsin Rapids clinic at (715) 803-7617. 


Allison Livernash

Physical Therapy Technician

Allison joined our practice in May 2023 and is a recent graduate of Carroll University with a Bachelor of Science Degree in Exercise Science. She intends to continue her education to become a Doctor of Physical Therapy and is utilizing her transitional time with us to help broaden her knowledge in outpatient rehab. She became interested in physical therapy after going through many rounds of physical therapy after many sports-related injuries in high school. In Allison's free time, she likes to be outside golfing, hunting, or just enjoying nature; along with spending time working out, reading, watching sports, or spending time with friends and family.


Marie Quimby

Physical Therapy Assistant

Marie joined the practice in March 2024. She is a 2001 graduate of Western Wisconsin Technical College in La Crosse. Marie has over 20 years of experience as a PTA working in outpatient care, acute care and long-term care facilities. 

She enjoys spending time with her husband Patrick and two children, Chester and Oscar. Marie's favorite activities are camping, kayaking, volleyball, crafts and teaching Sunday School. 

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