Dr. Theo Batistas | Dr. Maritza Diaz | Dr. Jason Dulac 


All our professionals at Railroad Dental Associates maintain the highest levels of accreditation and pursue ongoing education to stay abreast of the latest trends in dentistry.

Doctor Biographies

Staff Biographies





Dr. Theo BatistasManassas, VA Dentist - Dr. Theo Batistas

As a dentist, I have the opportunity to play many roles. I get to serve as a health care provider who addresses my patient's general dental health with vigor and effort. I get to help my patients get the cosmetic outcome they hope for. I get to be a skilled technician who must pay attention to detail, while making use of the wide spectrum of materials, techniques, and equipment that are available to benefit my patients. However, what I love the most about being a dentist are the long term relationships that I have established with my patients.

In order to become a dentist, I acquired the following certificates:

  • BS - Old Dominion University, Norfolk, VA
  • DDS - Medical College of VA School of Dentistry
  • GP Residency - Veteran's Administration Medical College in D.C.
  • Fellowship in Sedation Dentistry

As a dentist, I continuously strive to know the newest procedures and be familiar with the most advanced dental technology. I am currently pursuing a fellowship through the Academy of General Dentistry, and have attained my Oral Sedation certification through the Dental Organization of Conscious Sedation. I have also participated in many hours of continuing education in all phases of general dentistry.

I have worked very hard for many years to become a competent and compassionate dentist. Our team is composed of a group of caring, friendly individuals who go above and beyond to ensure your visit is as comfortable as possible. It is an honor to work with such talented people and to serve such a warm and wonderful community.


Dr. Maritza Diaz

Manassas, VA Dentist - Dr. Maritza Diaz

Welcome! I am Dr. Diaz. I am so proud to say that I have been practicing dentistry for more than 25 years and I am very passionate about my work. My mission is to thrive with compassion, dedication and experience. The best part of dentistry is the ability to establish a lasting relationship with my patients, keeping them healthy and happy.

For my education,  I received my undergraduate degree at the University of Puerto Rico, Mayaguez Campus and then attended the school of dentistry at the University of Puerto Rico and received my DMD in 1982. I am a certified Invisalign provider and I am also a member of the Virginia Academy of General Dentistry. Because I want to give my patients the best dental care, I regularly attend courses in continuing education. Most recently I attended implant courses offered by the Northern Virginia Dental Society and by the University of Pennsylvania Dental School.

I have been married for almost 30 years to another dentist, Carlos Aponte and have two beautiful children. My son Carlos is currently in Law School and my daughter, Cristina recently graduated from college and completed a Computer Animation Bachelor's Degree.

I am a breast cancer survivor and the love and support from my family, friends and patients has been a driving force in my recovery. I love to exercise and my favorite is the spinning classes. I also love to travel with my family and learn about other countries and their cultures.



Dr. Jason Dulac D.D.S.

I joined the team following five years of service in the United States Navy and a year of private practice in sunny San Diego, CA..  As a dental officer in the Navy I was first stationed in North Chicago, IL, providing dental care to our young Sailors in boot camp, many of whom had never seen a dentist before.

Following my time in North Chicago, I was stationed with the Marines in Okinawa, Japan a small subtropical Japanese island east of Taiwan.  While in Okinawa, I was attached to the 31st Marine Expeditionary Unit (MEU), an amphibious battle group that led humanitarian and joint training operationsin the region and responded to disaster relief calls.  I led humanitarian dentistry missions in Thailand and the Philippines, providing dental care to the local populace with limited access to dental care.  I also performed dental care underway for our Marines and Sailors aboard the USS Denver LPD-9, an amphibious ship that could ballast up and down to deploy smaller ships and hovercraft from the back, and the USS Essex LHD-2, another amphibious ship that additionally functioned as helicopter and harrier aircraft carrier and a floating hospital. 

After Okinawa, I was fortunate enough to be stationed in beautiful San Diego, CA..  While stationed in San Diego, I provided care to our Sailors assigned to smaller ships like destroyers and cruisers without designated dentists and also cared for the US Navy Seals on Coronado Island.

Following my separation from the service, I practiced in San Diego for a year prior to moving to Virginia and joing the team at Railroad Dental Associates.  From my time in the Navy and moving around in my youth, I appreciate how hard it is to find a dentist you enjoy, and I look forward to becoming your dentist at Railroad Dental Associates.  In my personal time, one of my favorite actrivites is sailing.  In Okinawa and San Diego, I enjoyed great sailing weather year-round.  Although year-round sailing might not be possible in Virginia, I look forward to sailing here in the summers.  I also enjoy traveling, cycling, hiking, skiing, and watching Michigan football.   Go Blue!

Dr. Dulac's Education:  Bachelor of Arts, Illinois Wesleyan University; Bloomington, IL; Doctor of Dental Surgery, University of Michigan School of Dentistry; Ann Arbor, MI; Residency, Captain James A Lovell Federal Health Clinic; North Chicago, IL





Kaity Carter - Office Manager - Insurance/Billing Coordinator

Hi I'm Kaity!  You probably knew me as the Insurance/Billing Coordinator, but now I am currently the Office Manager and doctor coordinator for Dr. Diaz.  My knowledge of the dental field and compassion for the patients is still the same, and now I get to work more on making sure you, our patients are well taken care of along with our great staff here at Railroad Dental.

My husband Mike and I have three beautiful kids, Jordan, Alexia and Kaiyah.  We are a very busy family from sports to being very active with our church family, immediate family and friends.  We definitely love to entertain especially during Football season.




Susan Allen - Sedation/Patient Coordinator


Hello! I'm Susan, Patient Coordinator for Dr. Batistas and Sedation Coordinator. I am a proud native of Northern Virginia. I am married and have two beautiful daughters. It has been my pleasure to serve in the field of dentistry for over 25 years, where I have continued to grow with the field and learn so many new advances in dentistry. I have had the honor to work as a clinical assistant and in our admin department in both of our Gainesville and Manassas Park offices.  It has been a pleasure to assist patients in achieving their goals and reaching their optimum oral health. I look forward to many more years of rewarding service to our community!




Ashely Mills - Hygiene Coordinator

Hello Everyone! My name is Ashely, I am the Hygiene Coordinator here at RDA. I enjoy working with such a great team who strives for excellence in all the work we do for our patients. Nothing  warms my heart more than to see patients walk out of our office happy with the results for a brighter, healthier smile. When you're here you're family. If you want your teeth to sparkle call us now and ask for Ashely and I will schedule you with one of our wonderful hygienists that will have your teeth squeaky clean!!

Outside  the office I enjoy spending quality time with my loved ones. I have two absolutely amazing children  Jaylen and Mariyah, they are my world!! I enjoy being a mother and helping others in need. I hope to see you soon!



Jamie Barlow - RDH

I am a graduate of Stark State College in North Canton, Ohio. I recently relocated to the DC/VA Metro area in July 2011, leaving my family and friends in Ohio and Florida. This relocation has brought many opportunities and new faces into my life and path of success. I extremely enjoy being a dental hygienist and meeting new, wonderful people everyday.

Outside of the office I enjoying sightseeing in our nation's capital and discovering new areas around my home. I enjoy taking classes to further my education.  Spending time in the gym is a great past time. Spending time with new friends since I've moved to this area, as well as traveling back home to spend time with family and friends brings me a lot of enjoyment.


Anna Schwartz

Welcome to our office! My name is Anna and I am a Dental Hygienist. I attended University of Michigan for Health Education and graduated from Mott Community College for Dental Hygiene. I absolutely love my profession; it allows me to have a positive influence on people every single day. I enjoy teaching my patients about dental hygiene and ways to have a healthy beautiful smile. My greatest joy is making people feel at ease in the dental chair and changing their outlook on coming to the dentist. I feel blessed to be a part of such a wonderful, caring and skilled team here at RDA.

When I am not doing hygiene I love to spend time with my husband Michael and our three children Robby,Alex and Alyssa. I have a very cute Miniature Schnauzer Rizzo who also loves my attention. My other big passions are capturing memories with photography and traveling as much as possible. Last but not least I love to get home to Michigan whenever possible to see all of my amazing family and friends.

Hope to see you soon!


Barbara Portillo, RDH

Hello, my name is Barbara Portillo. I was born in Lima, Peru. I came to the United States at the age of 6. I graduated from Northern Virginia Community College as a Dental Hygienist. I have been practicing for six years and have the pleasure to work with patients of all ages. I continue to improve my skills by attending continuing education courses. I have also received my license for administering anesthetic and nitrous oxide gas.

I am very family oriented. My two kids and I love to spend time together doing sports, attending church and helping our community. I am bi-lingual in both Spanish and English.




Enid Garcia

Hello, I'm Enid. I am a dental assistant and the Invisalign Coordinator for our practice. I have been an assistant for eight years and working with the Invisalign program in our office for four years. I primarily work with Dr. Diaz and Dr. Batistas. I enjoy working with our patients making sure they are as comfortable as they can be in our dental chair. As coordinator for the Invisalign program for all three of our doctors I work with the patients from the first impressions appointment all the way through the completion of their cases.

When I am not in the office, I spend my time with my family and friends. The best treasures of my life are my daughter Kassie, my son Adrian and my love Isaac.




Michelle Serrano-Fader

I have been a dental assistant since 1999.  I have been working with Dr. Batistas since 2004. I am bilingual in both Spanish and English.  I'm a  very highly motivated individual always striving for perfection and excellence. I have high moral, character,  integrity and knowledge to work in all the areas of dentistry.

In my spare time I enjoy spending time with my family and traveling. I also love to bake!




Theresa Thomas

Hello, I'm Theresa! I've been a Dental Assistant for over 30 years. I enjoy all areas of dentistry, my favorite is cosmetic dentistry and implants. I am so blessed to be working here at RDA with a super great staff and doctors. I strive for perfection with my work and want our patients to be informed about their procedures and comfortable with their treatment.

When I'm not working I enjoy my two dogs and Arts and Crafts. My true love is my family, my husband Frank, our four daughters Savannah, Bodie, Amanda and Bethany, our Son Dustin, our grandchildren Lucian and Karissa.

I am looking forward to the future and meeting new people and making you smile!



Jeisel Henriquez

Hello, I'm Jeisel. I love being a dental assistant at the best office in town!! My priority is making our patients feel welcomed, comfortable and at ease. I love everything about dentistry. My absolute favorite part of my job is the cosmetic aspect. I love being able to see our patients leave happy and with a smile on their face. The best feeling in the world is to know I was able to help someone overcome their dental fear and leave feeling confident to show off their beautiful smile! I mainly work with Dr. Yavrom, the most amazing person I've ever met. I am super blessed to work with some of the most caring and awesome dentists, hygienists and assistants here at RDA.

When I am not at work I enjoy spending time with my loved ones especially my six year old son Abraham and my love Nelson. I'm also working on expanding my career path as a dental hygienist.