Jennifer Bollinger, PT, DPT

Jennifer has been involved with the field of physical therapy since suffering an injury during cross country at 14 years of age.  As a patient, she saw the positive effect that physical therapy can have on people's lives and used that motivation to reach her goal of becoming a physical therapist.  She went on to receive her doctorate in physical therapy in 2010 from Azusa Pacific University.  She joined Landswick Physical Therapy in 2011 until summer of 2014 when she opened PEAK Physical Therapy to further her professional goals.  Jennifer continues to strive to improve her functional manual therapy techniques with continuing education courses through the Institute of Physical Art and Redcord.  As an active individual, she enjoys snowboarding, wakeboarding, and playing soccer.  Jennifer lives with her husband and sons, Robert and Zac.


Lauren mar, PT, DPT

A strong, competitive attitude and passion for athletics are what paved the road for Lauren choosing a career as a physical therapist. A former athlete herself, she now dedicates her time to helping others achieve their goals. She graduated Long Beach State in 2004 with an undergrad in kinesiology, with an emphasis in exercise science, and continued at University of Southern California where she earned her doctorate in physical therapy in 2007. She has continued to expand her education through the Institute of Physical Art and Redcord. She is excited and enthusiastic to help serve her community in the rewarding field that is physical therapy. Her passion for sports and athletics keeps her active throughout a wide range of activities such as surfing, hiking, snowboarding, and martial arts.

Brad Hollingworth, Administration

Brad is our expert Administrator.  He is the "jack of all trades" who will help you with scheduling and billing.  He has a degree in mechanical engineering and uses his analytic mind to perfect the business side of things here at PEAK.  He cherishes the opportunity to see patients return to their life as they improve and feels rewarded to be a part of it.  Brad enjoys staying active playing all sports and spending time with friends and family.



Nate sikorski, Back office manager

Nate joined the PEAK Physical Therapy team in January of 2018. He is a graduate of Cal State Fullerton where he earned degrees in Kinesiology and Public Relations. He enjoys helping others to learn more about their bodies in order to achieve lifelong wellness and improve their quality of life. Nate takes care of a handful of duties in the clinic including documentation, marketing, various administrative duties, and instructs in our weekend lecture series. He is a big sports fan and lover of the outdoors who enjoys spending his free time going to Dodger and Kings games, camping, going to Disneyland, and BBQing with friends.


sam rivero, class instructor