MEET OUR STAFF

Owner - MARK DE JONG, PT, DPT, SFMA

Mark graduated from the University of the Pacific in 2006 with his Doctoral Degree in Physical Therapy.   He has always been interested in orthopedics and sports physical therapy.  During his schooling, he had the privilege of working with Athlete’s Performance and training the highest level of athletes in the world.  He loves working with whatever level athlete, from the weekend warrior to the college athlete, to improve their movement patterns and build the necessary foundational strength that is needed for their situation.  He has been certified in the SFMA by functionalmovement.com to help people move and play more efficiently.

He also has a strong manual therapy background, completing a year-long manual therapy class in Grass Valley shortly after graduating from Pacific.  This helps him significantly in treating the post-surgical patient to the person with pain from sitting at a computer all day every day.   He states his joy comes from getting people back to their normal activities, whatever that may be. 

Mark also practices what he preaches as he loves staying fit, whether it be running, cycling, hiking, or rock climbing.  He makes sure he is able to do anything that he asks his patients do, as he feels it is important for everyone to stay strong and move well, because we all have a life to live.
MICHAEL LUCAS, PT, CSCS, SFMA

Michael was born and raised in Manteca and has been with Tokheim-Corbett since 2005.  He has a BA in Sports Medicine from the University of the Pacific in Stockton, CA, and went on to attend physical therapy school at Robert Gordon University in Aberdeen, Scotland.  He has been practicing since 2001 and, in addition to serving as a rehab director at a local hospital, he has worked in skilled nursing facilities, as well as outpatient clinics.

Michael is also a Certified Strength and Conditioning Specialist and has assisted local high school athletic programs.  He currently serves as an Army Physical Therapist in the Reserves and has contributed time to local high school JROTC programs.  He has also been certified in the SFMA by functionalmovement.com which helps assess movement patterns and dysfunction.

His outside interests include snowboarding, hiking and entertaining his two young sons. He and his wife enjoy weekend outings to the beach or to the mountains.
JESSICA SONKE, PT, DPT, SFMA, FMS

Jessica graduated from the University of the Pacific with her Doctoral Degree in Physical Therapy in 2005.  She is passionate about her work and is continually seeking to improve her skills and give high quality care to her patients.  Jessica has specific training in functional movement, manual therapy, and vestibular disorders. 

After graduating from Pacific, she furthered her education by completing the Folsom Long-term Orthopedic Manual Therapy course.  She has also taken numerous other continuing education courses including becoming FMS and SFMA certified (functional movement.com), which allows her to better assess dysfunctional movement patterns.   She is also certified in IASTM (instrument assisted soft tissue mobilization) with Smart Tools.  Her training helps her to treat a wide variety of patients, from the athlete looking to return to their sport to the post-surgical patient wanting to return to their daily activities.   She believes in helping people move better and in treating the cause of their problems so they can reach their fullest potential. 

When not working, Jessica enjoys running, waterskiing, staying fit, and spending time with her husband and 4 children.
HAL CORBETT, PT, Co-Founder

Hal has been a physical therapist for 45 years.  He was a Medic in Vietnam prior to attending physical therapy school.  He then graduated Cum Laude with his Bachelors in Physical Therapy from Loma Linda University in 1973.  Hal was a rehab coordinator in Southern California until he formed a partnership with Joel Tokheim in Manteca, CA in 1979. 

Hal has over 42 years of experience and has taken many continuing education courses over the years.  He has served mainly orthopedic, industrial, and sports patients, but also provides care for TMJ, CVA’s, amputees, and motor vehicle accident injuries.

Hal says he likes to treat seriously, but with humor.  He is usually found spending time on the golf course when he’s not in the clinic. He retired from daily operations of the clinic in 2017.
JOEL TOKHEIM, PT, Co-Founder

Joel has been providing quality physical therapy care to the residents of Manteca for over 40 years.  He has been a resident of Manteca for 50 years, graduating from Manteca High in 1969, and then continuing his education at Loma Linda University where in 1975 he earned his Bachelor’s Degree in Physical Therapy. 

Joel is co-owner at Tokheim-Corbett Physical Therapy, which he started in 1979.  He is passionate about the type of care he gives his patients and seeks to help them reach their highest recovery possible.  His experience, along with his continuous education courses, have enhanced his knowledge and skill to be able to treat a variety of patients, including geriatrics, orthopedics, and industrial injuries.

Joel has also been active in helping the community with his skills by working with the Manteca High Football team as well as speaking to the community about the importance of fitness and health.  He had the honor of being inducted into the Manteca Hall of Fame in 2009 for his contribution to healthcare in the community. 

Outside of work, Joel enjoys backpacking, rock climbing, biking, and playing tennis with his wife, 4 children, and 11 grandchildren. He retired from daily operations of the clinic in 2017.