Meet The Team

Our Doctors


Dr. Robert F. Morrison

CEO and Clinical Director

Dr. Morrison is the owner and founder of Robert F. Morrison, DMD, PC, a General Williamsburg Dentist Practice for children and adults since 1992. 

Dr. Morrison founded the practice after returning from being stationed with the U.S. Navy in England with the goal of providing genuine and compassionate care for the families of Williamsburg and the greater Hampton-Roads area. 

The practice has grown to incorporate some of the latest dental technologies as well as continue to provide extensive and patient-oriented care for families and individuals. With a great team of Williamsburg dentists and staff, the offices of Morrison Dental Group pride themselves on the personal attention and skill that they can offer their patients. Dr. Morrison graduated from Southern Illinois University with a Bachelor of Science degree in Chemistry in 1979. He attended Southern Illinois University School of Dental Medicine, graduating in 1982, completing a post-doctoral residency in Comprehensive Dentistry. He served as a dental officer ashore and afloat from 1982-1991 in the U.S. Navy and was the dentistry department head afloat the U.S.S. Guam. Dr. Morrison was head of the Pediatric Department from 1987-1988, Dental Clinic, Norfolk Naval Station, Norfolk, Virginia.

Dr. Morrison is married to Alison, who serves as Morrison Dental Group’s CFO. They have two sons: Frank, a LCDR in the United States Coast Guard and Alex, who also works with Morrison Dental Group as the Chief Compliance Officer. In his spare time, Dr. Morrison is a dedicated family man and enjoys fishing on the Chesapeake Bay, as well as kayaking and restoring British MG cars.

Dr. Morrison is a member of the ADA, American Academy of Sleep Medicine, The VDA, the PDA, and the International College of Dentistry.


Dr. Ann Wheelock

Dr. Ann Wheelock was born and raised in the Roanoke Valley of Virginia. Her father was an orthodontist and she has fond memories spending time at his practice after school growing up.

She attended Roanoke College for her undergraduate degree in Biology, then went on to VCU’s School of Dentistry where she fell in love with Richmond and chose to make it her new home. Dr. Wheelock is certified in Invisalign and is excited for opportunities to volunteer in the Mechanicsville/Atlee area.

Dr. Wheelock was first drawn to dentistry while growing up in her dad’s dental office. She loved seeing him and his team work together to create a fun atmosphere for their patients. She strives to create a similar atmosphere where patients feel at ease and confident in the care they are receiving. Her goal is to change the patient’s perception of dental care and give them confidence in their smile. In her words, “There is nothing more rewarding than meeting a new, anxious patient who has had poor dental experiences in the past and having them leave our office with a smile on their face.”

Dr. Wheelock has a French bulldog named Roux and describes herself as an introverted extrovert. She loves spending time with friends and family but also enjoys time alone to read and unwind. She is an avid tennis player and loves to play cards and board games. She also loves podcasts and thriller novels. She enjoys being in the kitchen and has become a very good baker! She frequently tests out new recipes for coworkers to try!

Dr. Rafael Siqueira

Dr. Rafael Siqueira

Dr. Rafael Siqueira is originally from Recife, a beautiful town on the coast of Brazil. He attended the University of Pernambuco in Brazil and graduated from dental school in 2010. 

He then went on to complete a Masters of Implantology which is similar to a US residency program. After completing that, he joined a PhD program at the Federal University of Pernambuco which sent him to the University of Michigan to do research for his master’s thesis. Once he completed his PhD, he headed back to Michigan School of Dentistry for a 3-year residency in Periodontics. During his time in school and residency, he was able to publish over 30 scientific articles in international peer reviewed journals and write five book chapters. This resulted in a few awards over the years. 

Dr. Siqueira’s interest in dentistry started to develop very early in his life by watching his parents who are both dentists. He observed his father teaching students and treating both students and patients with compassionate care. He witnessed a few instances where patients were moved to tears by the results of his father’s care and students whose lives were so strongly impacted by the mentorship his father provided on their path to become a Periodontist or Implantologist. Dr. Siqueira soon realized he wanted to have that same positive impact by being a dentist, educator and researcher.  

Dr. Siqueira describes himself as not only family-oriented and very sociable, but also easy-going and calm. He loves being with friends, having a good time and sharing great food. He is typically very optimistic. He is married to Renata, a lawyer, who just recently gave birth to their first child, Thomas. They do not currently have any pets but hope to add a dog to their family in the near future. Dr. Siqueira is a big sports fan, food lover and loves to travel. His hobbies include playing tennis, watching sports, exploring new restaurants, travelling and meeting new people, and learning new languages. A fun fact about Dr. Siqueira is that he speaks his native language, Portuguese, as well as English, Italian, and can communicate quite well in Spanish. He is currently taking a Spanish course to improve his fluency.

Dr. Paul Jiral

Dr. Paul Jiral

Dr. Paul Jiral was raised in Chesapeake, VA, and lived there from 1st grade through high school. He attended James Madison University for his undergraduate degree in education and taught for a year before realizing his desire to go to dental school.

Dr. Jiral attended MCV for his dental education and is a member of the ADA, Academy of General Dentistry, and the VDA. Dr. Jiral is also an approved Invisalign Provider and spent time volunteering with Big Brothers Big Sisters and the Richmond Jaycees.

Dr. Jiral was first drawn to dentistry because he loved the idea of working in the healing arts. He grew up enjoying his experience in the dental office but didn’t pursue the field until he had worked in the “real world” for a year. He is very personable and wanted to do something medical but didn’t like the idea of working in a hospital setting. He also enjoyed working with his hands, so dentistry seemed to be a great fit! Dr. Jiral is motivated each day by the simple pleasures in life like waking up and feeling the sunshine on his skin. He gets a great deal of satisfaction from planning out detailed treatment and seeing it executed perfectly, leaving the patient happy.

In his spare time, Dr. Jiral likes to find unorthodox ways of fixing things in his house and designing his own tools for his athletic hobbies. He considers himself a bit of an inventor. For example, he built his own trailer to pull his kayak behind his bike! His wife, Celia, ran his previous dental office but is retired now. She is on the hunt for her own new adventure! Dr. Jiral and Celia have three adult children and one grandchild who all reside in Virginia. Dr. Jiral describes himself as a well-adjusted middle child and enjoys any athletic activity. He has participated competitively in swimming, football, basketball, baseball, soccer, tennis, alpine skiing, volleyball, archery, track and field, a mini triathlon and wrestling. He enjoys any activity that gets him outside!

Our Staff


Alex Morrison

Regional Manager

Alex Morrison is from Williamsburg, VA. He helps with overseeing the Midlothian, Mechanicsville and Chincoteague offices, monitoring supplies and compliance for all offices as well.

He and his wife have a young son and two chocolate labs. When he isn’t working, he likes being outside and fishing.

Amanda Hewitt (1)

Amanda Hewitt

Office Coordinator/Area Manager

Amanda Hewitt joined the MDG family in July of 2018. She was born in Cape May, NJ and was raised in New Gretna, NJ.

After going to school for Forensic Science, her life took a different course and brought her here to Virginia and to our office. Amanda most enjoys working with our patients.

She gets satisfaction from seeing someone walk in the door upset and hopeless because they’re in pain or just don’t like their smile, and they leave happy, healthy, and smiling! In her spare time, Amanda enjoys hunting, fishing, crabbing, and spending time with her kids. She has a cat, dog, and a very old goldfish. A fun fact about Amanda is that she is a sharpshooter.

New Location! Morrison Dental Group - Norfolk Now Open! Click HERE to learn more!