Meet Our Staff

Meet Our Staff

Sterling VA Dental Center Provides the Care Patients Need

Since 1989, we’ve helped Northern Virginia families realize their dreams of good health and sparkling smiles at our Sterling VA Dental Center. Our family is dedicated to yours.

We each apply more than 25 years’ experience to your dental health:
• Giving children a positive introduction to dental care
• Applying the latest preventive treatment … and taking time to educate patients of all ages
• Expertly using the latest, safest techniques for fillings, crowns, bridges and more.
• Transforming smiles with skillful cosmetic treatments – such as whitening, reshaping, and bonding.

We run an on-time office – so you won’t be kept waiting … while scheduling enough time to answer your questions. And we provide a welcoming, relaxing environment … from gracious décor to headphones, warm towelettes and aromatic scents.

Plus, we’re easy to find – across from Dulles Town Center. Everything to make dental care easy and effective for you.

Dedication & Credentials

We keep your treatment state-of-the-art – we’re committed to the best technology as well as the most skillful techniques. Our extensive postgraduate continuing education training makes us each eligible for the Academy of General Dentistry’s prestigious Fellowship Award.

We have always been perfectionists in practice, yet warm in patient relationships. Before beginning our practice in Sterling, in 1989, we expanded our skills with exposure to considerable complex dental cases during a three year tour with the U.S. Navy in the 80’s. Our dedication was rewarded: Dr. Paul Callahan received a number one ranking among a peer group of more than 30 general dentists at his separation.

Our commitment to “doing our best” started with our academic studies. Here’s an overview:

You’re invited to learn more about our services … and call us for an appointment today!




Teri Holmes joined our practice in 2000. Teri’s background in dental assisting is key in understanding clinical procedures and insurance coding to maximize patient benefits. She can be heard on the phone answering dental questions and helping patients schedule appropriate care daily.  Teri enjoys travel, family and friends.




Penny Beltrano  has touched the lives of thousands of patients in her 36 year career as a dental assistant. Penny has been at Callahan Dental for 20 years and oversees the clinical functions of the office. Her needlepoint can be seen hanging from the walls of our office and is priceless.


Sonia Robles joined our practice in 2007 and has enjoyed a career in the dental profession since 1997. Fluent in Spanish, Sonia has allowed us to expand our services to meet the needs of the Hispanic community in the area. Sonia exudes warmth and a sincere charm. Her hobbies include jogging.




Tresa Holley  has played an instrumental role in our preventive care program since 1997.  A 1994  graduate of Baltimore City Community College dental hygiene school, Tresa’s gentle touch and skill has kept countless patients healthy and free from unnecessary problems. Patients ask for her by name. Tresa enjoys her family and golden retriever in her free time.


Carleigh Merriman  – bio coming soon.