Meet Our Team
Mark Ray, MD
Dr. Mark Ray earned his undergraduate degree from Abilene Christian University in Texas, and his medical degree from the University of Texas Medical Branch at Galveston. He continued his training with an Internship at John Peter Smith Hospital in Fort Worth. Dr. Ray then went on to complete a Dermatology Residency at Emory University in Atlanta, Georgia.
Board certified in Dermatology, Dr. Ray is the founder of Trinity Dermatology, where he has been in practice since 1990. He has also been serving as Clinical Assistant Professor of Dermatology at the University of Texas Southwestern Medical School of Dallas since 2005. In addition, Dr. Ray is a Preceptor at the University of Texas Medical Branch at Galveston and Adjunct Assistant Professor at Touro University College of Osteopathic Medicine.
Jon Pruett, MD, FAAD
Dr. Pruett is a native of Baton Rouge, LA. After graduating from University High School, he attended the United States Air Force Academy in Colorado Springs, CO, where he received a Bachelor of Science degree in 1993. Dr. Pruett then served on active duty for five years in the U.S. Air Force and was honorably discharged in 1998. That same year, he entered medical school at Louisiana State University Health Sciences Center in New Orleans, LA.
He graduated from medical school in 2002 with honors and was elected into Alpha Omega Alpha. After one year of internal medicine training at Exempla Saint Joseph's Hospital in Denver, CO, Dr. Pruett went on to complete a three year dermatology residency at Louisiana State University Health Sciences Center in New Orleans. Dr. Pruett joined Trinity Dermatology in July 2006 and received his American Board of Dermatology Certification in August 2006.
Dr. Pruett's professional interests include skin cancer detection and surgical treatment, acne, psoriasis and cosmetic procedures including Botox®, filler agents and laser procedures. In his free time, Dr. Pruett enjoys spending time with family and friends, reading, running and traveling.
Lisa Guidry Pruett, MD, FAAD
Dr. Lisa Guidry Pruett is originally from south Louisiana. At an early age, she decided that she wanted to be a physician because of her love for science and learning. She spent summers working in her father’s Internal Medicine practice in Covington, Louisiana and watched her mother attend medical school while she was in high school. She graduated summa cum laude from the University of Alabama in 1999 where she was the recipient of the Septima Cecilia Smith Award given to the most outstanding graduating Biology major.
She then entered Louisiana State University School of Medicine where her husband, mother, father, brother and sister all graduated with MD degrees. She was inducted into LSU’s chapter of Alpha Omega Alpha, the only medical honor society, as a Junior with only 6 other Junior medical students. She consistently scored in the 99th percentile nationally during medical licensure and dermatology inservice exams. Her interest in dermatology began during clinical rotations as a medical student when she was exposed to a variety of skin disorders in her pediatric, medical, surgical and obstetric rotations. She completed her internship in Internal Medicine at LSU Charity Hospital and her dermatology residency at LSU in Shreveport and New Orleans.
She started a dermatology clinic in the Northshore location of Ochsner Health System and was the sole dermatologist there for 3 years. She moved to Dallas in 2009 when she married her husband, Jon, who she practices with at Trinity Dermatology. When she is not practicing dermatology, she is happily busy raising two sons and two daughters.
Dr. Pruett enjoys all facets of dermatology, including medical, surgical and cosmetic dermatology. She is a member of the American Academy of Dermatology and American Society for Dermatologic Surgery.
Julie Nguyen, MD
Dr. Julie Nguyen was born and raised in Texas and originally from the nearby suburb Duncanville. She graduated from the University of Texas at Arlington summa cum laude and received a Bachelor of Science degree in Biology. She then left the DFW metroplex to attend medical school at the University of Texas Medical Branch in Galveston (UTMB) where she was graduated with honors and was elected into the Alpha Omega Alpha honor society. Shortly after finishing her one year transitional internship at John Peter Smith Hospital in Fort Worth, she moved out of state to complete her three year dermatology residency at the University of Oklahoma Health Sciences Center in Oklahoma City.
After many years away, she is excited to finally return back home to Dallas. Dr. Nguyen’s professional interests include general, surgical and cosmetic dermatology. She is a member of the American Academy of Dermatology and also fluent in Vietnamese. During her free time, she enjoys spending time with her family, cooking and traveling.
Sheryl Gyr, MPAS, PA-C
Sheryl Gyr is a native of Texas with a Bachelor of Arts degree in Art History from The University of Kansas’ College of Liberal Arts and Sciences. She attended The University of Texas at Southwestern Medical Center’s Physician Assistant Program where she earned her Masters in Physician Assistant Studies. She is Board Certified by the National Commission on Certification of Physician Assistants and the National Board of Medical Examiners.
Sheryl Gyr joined Trinity Dermatology on February 25, 2005. Her major professional interests include, but are not limited to the detection and treatment of skin cancer, acne, eczema, psoriasis and cosmetic procedures including Botox®, facial fillers and sclerotherapy.
Laura Taylor, Medical Aesthetician
Trinity Dermatology is proud to welcome Laura Taylor, Licensed Medical Aesthetician and Certified Laser Technician, to the practice. Laura has a decade of experience in the aesthetic field and offers a full range of services for all patients. Call our office for your complimentary consultation with Laura today!
Laura who is originally from Argentina, is a licensed medical aesthetician and professional laser technician who has been in aesthetics for over 9 years. After a rewarding career as a flight attendant caring for others, it seemed like a natural transition to enter in to the skin care industry. She has a passion for making people feel good about themselves while educating them about their individual skin care options. She specializes in a wide variety of cosmetic treatments and procedures and is active in continuing education to keep abreast of the latest trends. Whether you have teenage acne, mature skin or somewhere in between, Laura will design a plan to make you love your skin.
Michal Krawczyk, Practice Manager
Michal Krawczyk has been employed by Trinity Dermatology since 2008. He has a Bachelor’s degree in International Business and a Master of Business Administration degree.
As Practice Administrator, his responsibilities include patient satisfaction, personnel, employee policies and procedures, future business planning, and support for all staff and providers. Michal’s professional affiliations include: Association of Dermatology Administrators and Managers.