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Ryan Holbert, Operations Manager, smiling at the camera in the office of Dr. Gregory Martin.

Ryan Holbert

Operations Manager

Ryan joined the practice in 2023 as Operations Manager and Lead Assistant. His duties from an operational standpoint include managing the many third party vendors and companies working with Dr. Gregory Martin, DDS, as well as streamlining office protocols to improve the patient's experience at every step of their journey. Ryan has worked in the field of dentistry since 2005 where he was trained as a surgical assistant in orthognathic surgeries, oral maxillofacial traumas and implant surgeries. His expertise on the business side of the practice has helped dental clinics around the country operate smoothly with a focus on patient satisfaction. Ryan has worked as an ultrasound technician and in his spare time is a licensed massage therapist and is very committed to fitness and wellness.

A photo of Judy Martin, Front Desk Coordinator, in a bright pink sweater, smiling at the camera.

Judy Martin

Front Desk Coordinator

Judy is honored to be a member of Dr. Martin's team! Little did she realize when she retired from a fulfilling and rewarding career as a high school Spanish and French teacher that Dr. Martin would invite her to join his practice. Her goal is to ensure that all patients feel welcome. When Judy is not greeting patients, answering the phone, or scheduling appointments, she enjoys spending time with her family, traveling, reading, studying languages, and playing her cello. She is extremely proud to be a part of Gregory Martin DDS.

A photo of Tania Del Valle, the Office Manager and Insurance Specialist, smiling at the camera from a desk.

Tania Del Valle

Office Manager and Insurance Specialist

Tania plays a critical role at Dr. Gregory Martin DDS as the office manager and insurance specialist. She introduces every patient to the office and walks them through each step of the treatment process, including answering any and all questions about the patient's dental insurance plan and coverage and helping stage the treatment plan to meet their individual dental and financial needs. Tania has worked in the dental field for over nine years in a variety of capacities and has a vibrant passion for dentistry and caring for patients.


The comfort of the patient is a top priority to Tania and she loves seeing patients thrive with the exceptional dental care and results patients have come to expect from the practice.  Tania manages all relations with specialists and referring doctors and serves as a patient liason when the care of a specialist is required.  When she is not in the office she enjoys spending time with her daughter Maya. She is a bilingual English-Spanish speaker.

Our Team

Safe & Affirming

We are committed to creating an environment where everyone feels respected, heard, and valued. Our team provides compassionate care that is tailored to the unique needs of LGBTQ+ patients. Whether you are seeking routine comprehensive dental care, cosmetic dentistry, restorative treatments, or facial aesthetic care, we are here to help you achieve the smile, face and body you deserve.

Our Story

Dental care is an essential component of overall health and wellness. We understand that many LGBTQ+ individuals have experienced discrimination or discomfort in medical settings. We want to assure you that our dental practice is a safe, welcoming, and inclusive space for all individuals, regardless of their sexual orientation, gender identity, or expression. We are a queer-owned business that celebrates, embraces and encourages the unique story that each patient brings to our office.

A photo of Dr. Gregory Martin, smiling at the camera in front of a wall with the office logo

Dr. Gregory Martin, DDS, MS


Dr. Gregory Martin grew up in Fairfax County, Virginia and has spent the majority of his life in the Washington DC metropolitan region. He completed his undergraduate studies in Mathematics earning both a Bachelor of Science in Mathematics and a Masters of Science in Mathematics and Statistics from Georgetown University. He is a graduate of the University of Maryland School of Dentistry where he earned his Doctor of Dental Surgery and completed their Oral Surgery Clerkship Program.

Dr. Martin is an active participant in local and national continued education courses in both the dental as well as facial and medical aesthetics field. He places high importance on the use and implementation of cutting edge technology in his practice and the benefits of practicing digital dentistry.  His practice is a one-of-a-kind comprehensive dental and medical aesthetics center that offers not only comprehensive digital modern dentistry but all of the most modern and cutting edge cosmetic and medical aesthetic procedures and treatments.  


Formerly a high school mathematics teacher, Dr. Martin loves teaching and spends time with every patient explaining their treatment in clear and concise ways that empower them to better understand and take control of their health.  Dr. Martin enjoys mentoring his colleagues and other practices who are interested in expanding their practice and introducing their patients to new treatments and modalities.  He is a nationally sought after guest speaker and lecturer and a Key Opinion Leader for Lutronic, an internationally recognized leading manufacturer in aesthetic excellence.  In his spare time Dr. Martin pursues fitness and has been a group fitness instructor in Washington, DC for the past twelve years. He plays the trumpet, piano and is fluent in German.  He is a member of the American Dental Society, Spear Education Dental Study Club, the American Society for Laser Medicine and Surgery and the Washington DC Equality Chamber of Commerce.

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