Meet Our Staff

Timothy S. Mountcastle, M.D.

Medical Director

Dr. Timothy Mountcastle is the Medical Director at Radiance Medspa and also serves as Chief or Plastic Surgery at Inova Loudoun Hospital. He graduated with honors from Howard University and is a recognized specialist in plastic surgery. As a Virginia native, he is pleased to return to the area after completing his training in Louisiana. He trained at the prestigious Charity Hospital in New Orleans for seven years and earned degrees in both general and plastic surgery from Louisiana State University. During his tenure at LSU, he was appointed chief resident in both general and plastic surgery.

This position is held by the most qualified resident as elected by the staff and his peers. Dr. Mountcastle is currently board certified in general surgery and a candidate for membership in the American Society of Plastic Surgery. He is also a member of the Alpha Omega Alpha Honor Society, which is reserved for members with all true honors accompanied by the responsibility to sustain the vision and goals of the society: Professionalism, Scholarship, Leadership and Service.

Practicing aesthetic and reconstructive surgery for five years, Dr. Mountcastle is one of only a few plastic surgeons in the Washington D.C. metropolitan area who performs "DIEP"breast reconstruction. Dr. Mountcastle specializes in breast surgery, including augmentations, reductions, and reconstructions. His other areas of expertise include the treatment of VNUS Ablation, abdominoplasty and laser liposuction. Currently, he has his own plastic surgery practice (www.mountcastleplasticsurgery.com), and is Chief of Plastic Surgery at INOVA Loudoun County Hospital at Lansdowne,Va, and is on staff at INOVA Fair Oaks Hospital and INOVA Fairfax Hospital.

Dr. Mountcastle enjoys spending time with his pug, Madison and participating in sports such as soccer, tennis, and boating, as well as both water- and snow-skiing.

Laura Middleton, CRNP

Nurse Practitioner, Cosmetic Nurse Specialist

Laura joined Radiance Medspa in December 2007. She received her BSN degree from Georgetown University in 1996 and her Master's in Nursing from George Mason University in 2005. She has been practicing in the field of aesthetic medicine since 2001. She is ANCC credentialed and has undergone advanced training and is certified to perform Botox and dermal filler injections, laser, IPL, and lipodissolve.

Laura believes in treating the client in a holistic manner encompassing the mind-body relationship and how looking better can truly improve how one feels.

Michelle Calvo, LE

Licensed Master Aesthetician

Michelle joined Radiance in October 2007. Prior to becoming an aesthetician, Michelle spent several years teaching middle school English for Fairfax County Public Schools. Skincare and makeup was always one of her hobbies, so she attended Yvonne Di Vilar Scientific Skin Care in Vienna, Virginia. After her training in skincare, she decided to make the switch to full time esthetics. She advanced her skills by working in medical spas with physicians, mastering chemical peels and advanced protocols.

Michelle is licensed as a master aesthetician in the state of Virginia. She is certified in medical facials, chemical peels ranging from superficial to medium depth, microdermabrasion, and the Palomar IPL for hair removal and sun damage and rosacea.

She believes in combining a variety of sources for optimizing the skin's health and appearance. She resides in Fairfax with her husband Miguel, and her son Mateo.

Billy McKinney, LE

Licensed Master Aesthetician

Prior to attending Yvonne de Vilar Scientific Skincare School Master Esthetics Program, Billy dedicated time and focused her skills on In-Home nursing and Hospice care for 10 years. Upon graduation from Yvonne de Vilar she started her career in day spas mastering custom facials and waxing. After extended training in chemical peels and advanced protocols, Billy joined the Radiance team as a Master Aesthetician in February 2009. Billy brought her passion for people into her new career and is dedicated on helping each client increase their confidence and self esteem by achieving their skincare goals.

Christina Smith

Spa Coordinator & Makeup Artist

Chrissy joined Radiance with experience with Merle Norman Cosmetics as a makeup artist and beauty consultant, and Nordstrom as a personal shopper. Prior to joining Radiance she planned activities and was a tutor for school girls at "A Place for Girls" in the Tidewater , VA area. Chrissy is currently studying for her nursing degree. In addition to her love for aesthetics and makeup, she is a lash extension specialist. Her expertise is in makeovers for weddings and special occasions. Chrissy's goal is for you to achieve a makeup look to match your lifestyle and bring out your natural beauty.

Julie Bissler

Spa Coordinator/Makeup Artist

Julie joined Radiance in April 2008, as a client consultant. In addition to her prior experience at a smaller medical spa, she has worked as a make-up artist with MAC Cosmetics. She has a talent for special event makeup from being the cosmetic artist for live events at Nordstrom as well as for Photo shoots.

"I was excited to come to Radiance because of the incredible menu of services we have to offer, as well as the professionalism of the staff here".

Julie's extensive experience helps her clients to feel comfortable with new products and procedures that bring out their very best features. Her goal is for every one of her clients to have a great experience when they visit Radiance.

Julie lives in Northern Virginia with her husband, two children, and one very spoiled Shitszu.

Nickie Clark

Licensed Massage Therapist

As a stressed-out college sophomore, Nickie treated herself to her first massage. During that massage, she found her calling and ended up changing majors from Music Education to Massage Therapy. She is a 2002 graduate of Virginia Learning Institute (now National Massage Therapy Institute) in Falls Church, Va. She is nationally certified and licensed in Virginia and Fairfax County. In addition to offering Swedish and deep tissue massages, Nickie is certified in hot stone and prenatal massages. She is also a certified infant massage instructor and a certified doula, or labor assistant.

Before joining the Radiance staff, Nickie worked in several day spas and chiropractic offices. Radiance has given Nickie the opportunity to combine the experience gained in spa and medical settings.

Nickie realizes that every massage client is different, and encourages communication before, during, and after each massage to ensure that each clients needs are being met.

Heather Long

Marketing Director

Heather's background includes spa management at many levels in spas surrounding the DC metro area. Her enthusiasm for business development led her to Radiance where she leads the marketing, advertising, and educational campaign development and pull through, including that of neighborhood grass roots initiatives.

Sheri Dranzo Siegel, PharmD

Spa Director

Sheri D. Siegel is the Owner and Operator of Radiance Medspa Fairfax, Virginia. Her unique blend of scientific training, management, and marketing experience lends her the expertise in healthcare and business management. As Spa Director, Sheri is responsible for managing operations, implementing business strategy and development, and growing service and retail offerings at Radiance Medspa. Her experience in healthcare and interest in skincare, fitness, and wellness make this a natural transition. The image you project, Sheri believes, contributes to overall self satisfaction and confidence.

Sheri has nearly 10 years experience in the pharmaceutical industry. Prior to opening Radiance Medspa, Sheri served as Manager of Medical Science Liaisons for a global biopharmaceutical company, UCB Inc, for 4 years. She mentored PharmDs, MDs, and PhDs to enhance scientific and communication skills and team spirit through one-on-one coaching and motivation. She managed overall team productivity, and led team expansions. Prior to her promotion to manager, Sheri was a Medical Science Liaison with UCB and a Medical Scientific Associate for Novartis Pharmaceuticals. In these roles, her scientific knowledge was exercised in daily interactions with academic physicians.

Beyond her experience in Medical Affairs, Sheri was an Industrial Clinical Pharmacy Fellow, Marketing Operations for Novartis where she acted as a key member of a product team for a pre-launch respiratory drug. With her background as a scientist, she developed initiatives that utilize the marketing message in support of the product's positioning. She held an appointment of Adjunct Clinical Professor at Rutgers University College of Pharmacy. Sheri holds a B.S. and Doctor of Pharmacy from the University of Pittsburgh and practiced as a staff pharmacist at the University of Pittsburgh Medical Center and Forbes Regional Hospital in Pittsburgh.

Sheri is married to Scott Siegel. They reside in Oak Hill, VA with their daughters, Olivia and Claudia, and son, Martin.

Driving distance to Radiance Medspa Fairfax