Our Mission Statement


To provide a warm, comfortable, and stress-free environment for our patients’ dental care and to deliver uncompromising dentistry.

Meet our Doctors

Long H. Nguyen, DDS

After graduating from Wesleyan University in Connecticut with a Master of Science degree in Molecular Biology and Biochemistry, Dr. Long Nguyen decided to pursue a career in dentistry. After graduating from Columbia University in New York City, Dr. Nguyen joined the United States Public Health Service (USPHS) to provide his services to areas where oral health professionals are lacking. He then packed his bags and headed west to serve as a commissioned officer on a Navajo Reservation in Kayenta, Arizona. He is grateful for such a wonderful experience; both professionally and spiritually.


After serving for two years with the UPHS, he moved back to the East coast in order to realize his dream of opening a private practice. Having practiced dentistry since 2003, he has established his practice in Gainesville, VA. Since improving patient care is of huge importance to Dr. Nguyen, he continues to attend a multitude of continuing education classes in order to keep up with constant changes in the field of dentistry.


Dr. Nguyen lives with his wife, daughter, and son in Gainesville, VA. During his free time, he enjoys golf, volleyball, and spending time with his family.

Meet our Team

Jennifer Charlesworth, BSDH, RDH

Jennifer Charlesworth has been our treasured Dental Hygienist at Lake Manassas since 2010. Jennifer was born in Northern Virginia, and graduated from Old Dominion University. She began her career as a periodontal assistant where she first discovered her passion for dentistry. She later went back to school to become a  dental hygienist. Jennifer enjoys traveling to new places, eating crazy food, and spending time with her family.

Taneilya Williams

Taneilya has been a dental assistant for 13 years.  Taneilya first worked with Dr. Nguyen in an office in Herndon, VA prior to joining him at Lake Manassas Dental Center in 2008.  Since then, she has gotten married and has 2 beautiful children.  She loves spending time with her family and traveling with her husband.

Kimberly Poland, RDH

Kimberly was born Manassas, Virginia and has called Haymarket, Virginia her home since 1985.  Kimberly has always known that her career would be in dentistry.  She started dental assisting at the age of 16 and assisted until she graduated from dental hygience school in 1993.

She has been married for 21 years and has 2 amazing daughters.

Amanda Embrey

Amanda joined Lake Manassas Dental Center in 2014.  Prior to joining, she spent 7 years in the medical field.  She is newly married.  She loves animals and spending time at the beach.

 Copyright © 2020 All Rights Reserved Website Design and Development by SwainGraphics LLC.