meet the team

Play Video

Matthew George smiling in front of a stone wall.

Director of Clinical Services

R. Matthew George, D.C.

At our practice, we are committed to providing the highest quality medical and chiropractic care. If you have any questions or concerns, feel free to contact me directly at drgeorge@anthonychiro.com.

Dr. George earned his Bachelor of Science in Biology from Marshall University in West Virginia in 2006. He continued his education at Parker College of Chiropractic, where he earned a second bachelor's degree in Anatomy and his Doctorate in Chiropractic Care in 2010.

In 2012, Dr. George joined Anthony Medical & Chiropractic Center and has grown with the company ever since. Today, he serves as an owning provider and the Director of Clinical Services, dedicated to enhancing patient care and outcomes.

A passionate advocate for health and wellness, Dr. George enjoys staying active with trail running and participating in community races and events. He also finds joy in golfing with family and friends. In addition to chiropractic care, Dr. George has a strong interest in computer science and is committed to leveraging technology to improve healthcare delivery and patient well-being.

When he's not working, Dr. George is a proud family man who treasures quality time with his wife and two children, creating lasting memories together. Outside of work and family, he has a deep love for concerts and live music, always seeking the next opportunity to enjoy the vibrant energy of a great performance.

Dr. Jake Diamond smiling in front of a stone wall.

Chiropractor

Jake Diamond, D.C.

Born in Dallas and raised in the Hill Country town of Kingsland, TX, Dr. Jake Diamond brings a deep-rooted Texas spirit and a strong commitment to health and wellness to his chiropractic practice.

He earned both his Doctor of Chiropractic degree and a Bachelor of Science in Anatomy from Parker University in 2024. Currently, Dr. Diamond is furthering his expertise by pursuing a Master of Business Administration with a major in Health Care Management.

Dr. Diamond is passionate about delivering high-quality care that supports the body’s natural ability to heal. He is dedicated to ongoing professional growth and refining his techniques to provide the best outcomes for his patients.

When he’s not in the clinic, Dr. Diamond enjoys staying active—whether he’s working on his golf game, weightlifting, exploring the outdoors, or checking out new places with friends. He’s also a fan of pickleball and axe throwing.

Dr. Roland Njumentoko smiling in front of a stone wall.

Chiropractor

Roland Njumentoko, D.C.

Dr. Roland Njumentoko D.C has been practicing chiropractic since his graduation from Parker Chiropractic college in December 2014. He completed his undergraduate studies at the Texas Woman’s University in Denton, Texas.

For Dr. Roland, the best two things about being a chiropractor is the ability to help people achieve better health and wellbeing and also knowing he is making a positive difference in people’s lives.

Always wanting to be a doctor growing up and seeing the turn healthcare was taking towards more natural, holistic means and not wanting to use medication as a band aid to cover up people’s symptoms, he found Chiropractic.
As the saying goes, you choose to be a chiropractor but being a chiropractor chooses you.

Dr. Roland is a former Cameroonian soccer international. He spent most of his career playing professional soccer in Germany and Slovenia. In 1991, he participated in the All-African Games in Cairo, Egypt where he won a gold medal in soccer for Cameroon. He also took part in the 1996 African Cup Of Nations where he had the unique opportunity to meet and shake hands with the famous NELSON MANDELA (R.I.P, then president of South Africa).

After completing his professional career, Dr Roland moved to the United states in 2001 and was inspired to pursue his longtime passion and dream that blended sports medicine and wellness. He is a certified Master flexologist and very proficient in multiple soft tissue and physical rehabilitation techniques.

In his free time, Dr Roland enjoys spending time with his wife Rachel and son Blu. He is also an avid tennis player and still loves playing veteran soccer.

Acupuncturist

Dr. James

Dr. James has been practicing Chinese Medicine and acupuncture since 2003 in Taiwan and has been practicing in Texas since 2012. He the 4th generation in his family to practice Chinese medicine, spanning over 150 years of passing down experience and knowledge!

Education

Dr. James graduated from Texas Health and Science University in 2012. During his studies, he had the most clinical hours of practice and was known as the student in practice with the most patient recommendations. Most of his patients show significant improvement after the first treatment session.

Dr. James is specializes in nerve damage, such as neuropathy, pinched nerve, trigeminal neuralgia, shingles, sciatica, carpal tunnel, abnormal tingling and numbness sensation; also in internal medicine, such as circulation, stress, digestive dysfunction, female issue, infertility, low energy, obesity, fibromyalgia.

Not only does Dr. James inherit the full knowledge of the most ancient medical science in the world but he’s continued his education of modern health information in order to better provide treatment to his patients. It is his philosophy that the treatment is more than a “treatment.” The goal of his practice is to give patients a healthier and better life quality in the most natural way, such as through acupuncture, herbal medicine and balance nutrition.

Nurse Practitioner

Andrea “Cristi” Flynn, APRN, FNP-C

Andrea “Cristi” Flynn, APRN, FNP-C is a board-certified Family Nurse Practitioner and U.S. Army veteran with over two decades of experience in nursing and healthcare leadership.

She earned her Bachelor of Science in Nursing from the University of Louisville in 2003 before commissioning into the U.S. Army Nurse Corps, where she served honorably as an operating room nurse in both overseas and domestic assignments.

Following her military service, Cristi continued her work in perioperative care and labor and delivery, cultivating a strong passion for patient education. In 2019, she completed her Master of Science in Nursing and Family Nurse Practitioner program, later dedicating her practice to veterans' healthcare.

Cristi and her active-duty husband settled in Central Texas in 2017 with their two daughters. Together, they run a small horse farm in Belton, focusing on the conservation and responsible breeding of endangered Irish Draught horses for dressage, jumping, and vaulting. Deeply committed to community engagement and sharing her passion for the sport, Cristi teaches equestrian riding and vaulting lessons and regularly coaches her team at competitions. She integrates her holistic approach to wellness into her teaching, helping students develop strength, confidence, and balance both in and out of the saddle. She also enjoys traveling and making memories with her husband and daughters.

Physician Assistant

MAJ (Ret.) James S. Lorenz, MPAS, PA-C

MAJ (Ret.) James Lorenz is a board-certified Physician Assistant with over two decades of dedicated service in both military and medical settings. He earned his Bachelor’s degree in Physician Assistant Studies from Midwestern University in 2006 and went on to complete his Master’s degree in Physician Assistant Studies at the University of Nebraska in 2010.

James proudly served in the United States Army for 23 years, retiring in 2022 with the rank of Major. His military career shaped his clinical expertise, leadership, and commitment to providing patient-centered, high-quality care in diverse and often challenging environments.

Today, James brings that same level of dedication and discipline to his civilian practice. He is passionate about improving patients' health through evidence-based medicine, compassionate care, and a strong provider-patient relationship.

Outside of work, James enjoys spending time outdoors fishing and hiking, as well as staying active through weight lifting. He values balance in life and strives to model the healthy lifestyle he encourages in his patients.

Meet Our Massage Therapists

OFFICE HOURS

Monday
8:00am - 6:00pm

Tuesday
8:00am - 6:00pm

Wednesday
8:00am - 6:00pm

Thursday
8:00am - 6:00pm

Friday
8:00am - 6:00pm

Saturday
9:00am - 2:00pm

Sunday
Closed

Anthony Medical & Chiropractic Center

900 W Central Texas Expy
Killeen, TX 76541

(254) 634-4010