Meet the Doctor

20 years in Business!!!!


Dr. William M. Sonak, DC

Dr. Will was born and raised in Front Royal, VA.  He graduated from William and Mary with a BS in Kinesiology in 1992.  After 3 years of “soul-searching” and volunteer work which included youth ministry and teaching high school, he entered chiropractic school in Marietta, GA.  Dr. Will graduated with honors from Life University in 1999.  He worked in two different chiropractic offices before opening Sonak Family Chiropractic in Sterling  in April 2002 and Western Loudoun Chiropractic in Purcellville in June 2014.

Dr. Will’s first experience with chiropractic was in Front Royal at age 5.  He suffered from asthma and took medications and inhalers for years.  A local chiropractor helped him breathe better which allowed him to be medication and drug free and no longer experience asthmatic symptoms.  Thus, he was destined to be a chiropractor at a young age.

Dr. Will married Alison after meeting her during his youth ministry days.  They met and wed at St. Mark’s in Vienna.  With Alison being a dietitian, they were a perfect fit.  Dr. Will and Alison have 2 children, Nathaniel, and Mackenzie.  Both were born naturally, and both have been under chiropractic care since birth.

Dr. Will is a Family Chiropractor and has a certification in pediatrics and pregnancy, which includes certification in the Webster Technique.  Dr. Will has been named:  Chiropractor of the year for Virginia, Provider of the Year for the Loudoun Free Clinic, and Top Chiropractor for the Northern Virginia Magazine.  He is a member of the Loudoun Chamber of Commerce, Knights of Columbus, International Chiropractic Pediatrics Association, Virginia Chiropractic Association, and is a parishioner at St. Francis in Purcellville.  When Dr. Will is away from the office, he enjoys spending time with family and is an exercise fanatic by participating in:  running, biking, tennis, basketball, hiking, swimming, and racquetball.


Meet the Staff


Alison Sonak, RD 

Alison is Dr. Will's wife of  20 years and a graduate of Virginia Tech.  She is a registered dietitian and a mom of two children, Nathaniel & Mackenzie.  She has been involved with Sonak Family Chiropractic from the beginning as both the business owner and resident nutritional expert.  She works out of this office as well as other offices providing Nutrition counseling.  She can be reached at


Kelly DeMarce

After graduating from MCV in 1995 with a B.S. in Rehabilitation Counseling, Kelly moved to England in 1996 and began studies in holistic therapies and complementary medicine.  Kelly started coursework to become a hypnotherapist in London and completed the certification program through the NGH once she returned to the US in 2001. Her interest in energy medicine guided her to Reiki and became a Reiki Master Teacher in 2007. 

Kelly works with clients using a combination of counseling, hypnosis and energy healing.   Her specialties include anxiety  disorders, stress, behavior and habit change, depression, phobias and pain management.  She also works with children as young as 6 and has had wonderful results addressing childhood anxiety, enuresis/encopresis and helping children adapt to change.

She has lived in Reston since 2001 and loves the community, diversity and the beautiful nature. To schedule an appointment, contact her at