Meet The Team

Chiropractor Barrington NH Alex Marquignon

Chiropractor, Clinic Director

Alex Marquignon, DC, CCSP

Dr. Marquignon is a Doctor of Chiropractic and a Certified Chiropractic Sports Physician. He has advanced training in assessing and adjusting extremities (shoulder, hip, knee, etc), and TMJD. Dr. Marquignon is excited to serve patients of all ages at any point in their individual health and wellness journey.

Dr. Marquignon was born and raised in France near the beaches of Normandy. He has been a competitive athlete his whole life, focusing on Judo and, later, American football through High School. He went on to play College Football at The University of Sioux Falls in South Dakota, where he earned a Bachelor of Science Degree in Exercise Science, before attending Palmer College of Chiropractic in Iowa.

As a member of the Men’s Rugby Team throughout his time at Palmer, he continued experiencing the benefits of chiropractic with the reduction of injuries, increased performance, and recovery. This only further reinforced and enhanced his enthusiasm for choosing this career path.

Chiropractor Barrington NH David Rivera Team


David Rivera, DC, SpBAP

Dr. Rivera enjoys working with all types of patients by helping them realize the great benefits of chiropractic care. He is passionate about working with pregnant and postpartum women, and the pediatric population which led to additional training and subsequent Webster Technique and Perinatal Care certifications. Dr. Rivera is a Spinning Babies Aware Practitioner and prioritizes a physiological approach to birth that helps the baby achieve an optimal position in the womb. Dr. Rivera is also proficient in the Activator technique - a gentle adjusting technique for patients with osteoporosis.

After discovering chiropractic from sustaining injuries playing tennis, he became motivated to become a chiropractor and help people achieve health through chiropractic care. He attended Life University in Georgia, where he graduated summa cum laude in 2018. Prior to attending chiropractic school, he obtained a Bachelor of Science in Athletic Training at the University of Puerto Rico, where he helped manage collegiate athletes and their injuries.

Outside the office, Dr. Rivera is a tennis enthusiast and also enjoys archery, bouldering, and escape rooms. Dr. Rivera looks forward to serving the seacoast community for years to come.


8:00am - 6:00pm

7:00am - 5:00pm

8:00am - 6:00pm

7:00am - 5:00pm

8:00am - 1:00pm

Saturday & Sunday

Middleton Chiropractic at Barrington

9 Colonial Way Suite A
Barrington, NH 03825

(603) 948-1303