About Us

Meet Our Staff

Marissa Hervey

Marissa Hervey, DayGlo Med-SpaMarissa was born in Ohio, but has lived in Florida most of her life. In 2003, with over fifteen years of experience in the medical field, Marissa decided to leave the fast paced hospitals and dive into the serene surroundings of skincare. “I finally feel like I’m doing exactly what I was meant to do. The skincare business allows me to the opportunity to create lasting relationships with my clients which is what I missed in the hospitals.” And according to her clients and co-workers, she has indeed found her calling. Marissa’s giving heart and healing mind are the traits she shares with every client, everyday.

With the support of Dr. Robert Rehnke and his staff, Marissa uses the perfect mix of the latest technological advances that Medical Skincare has to offer. “I want every client to enjoy themselves, obtain their desired results, and feel like a part of our family, in whichever order is best for them.” And with her lengthy and extremely loyal client base, Marissa is clearly delivering on all three.

Marissa is a licensed Para-Medical Aesthetician, and a certified Master Make-Up Artist. She is trained and certified in many skincare products including jane iredale Mineral Makeup, SkinCeuticals, Obagi, SkinBetter, Sonage and Eminence Organics. Her specialties include a variety of chemical peels, microneedling, dermaplaning and corrective treatments for rosacea, acne, aging skin and hyper-pigmentation.


Gabriella Sestito

Gabriella Sestito, DayGlo Med-Spa

Gabriella was born and raised in St. Petersburg, Florida. In 2009, she graduated from the University of South Florida with her bachelor’s degree in Mass Communications, specializing in Public Relations. Shortly after graduating, she accepted a dual position for both DayGlo Med-Spa and Dr. Rehnke as their Director of Communications.

Working in the skin care industry for several years, her interest in skin health began to grow into a passion. She learned a lot about skin conditions, products and treatments. In 2013, at the encouragement and inspiration of her mother – Marissa – she decided to take the leap and take her education to the next level. She attended the Florida School of Electrolysis and Skin Care and became a licensed aesthetician. She is so excited that she made this decision because she loves helping her clients achieve their skin care goals and feel more comfortable and beautiful in their own skin. And she is also proud to work alongside her mother and follow in her footsteps!

She specializes in treatments such as microdermabrasion, chemical peels, dermaplaning and microneedling. Gabriella is a certified and licensed microblading artist. She has also had extensive training in SkinCeuticals, Eminence, SkinBetter, Obagi and jane iredale Mineral Makeup.

In her spare time Gabriella enjoys dancing, as she has been dancing since age five. For many years, she danced competitively in ballet, jazz, tap and clogging. She still actively takes tap and hip-hop classes.


 Kriena Lang

Kriena Lang, DayGlo Med-SpaKriena Lang, a Florida native, has lived in Seminole most of her life. Kriena attended undergraduate school at St. Petersburg College before she moved on to study at The Salon Professional Academy. Here, she took extra courses to become certified in microdermabrasion and chemical peels. She has attended master classes for jane iredale Mineral Makeup, SkinCeuticals, SkinBetter, Obagi and Eminence. She is also proficient in additional product lines carried by DayGlo Med-Spa.

Kriena desired to do something that would make people feel good about themselves and their skin. She was inspired to enter into the beauty industry by her mother, who is a hair stylist. Kriena competed with the cheerleading squad for Seminole High School, giving her a competitive edge. Her hobbies include spending time with friends, family and enjoying Florida’s beautiful beaches.


Cheryl Silbernagel, Nurse Practitioner

Cheryl has specialized in aesthetic medical treatments since 2007. Prior to following her passion to help clients achieve their aesthetic goals, she earned both her Bachelor’s and Master’s of Science in nursing at the University of Florida.


Denise Merdich, Nurse Practitioner

Denise is a National Injectable Trainer to physicians in advanced techniques for neurotoxins (Botox and Xeomin) and all dermal fillers. Denise is a national injectable trainer who has taught for Allergan (Botox) for seven years and Merz Aesthetics (Radiess, Belotero and Xeomin) for six years. She is clinical director and injectable expert nationally and internationally for Denta-Spa Seminars and Cosmedix Aesthetics.


Cancellation Policies & Fees

We understand that sometimes it is necessary to reschedule appointments. We value your business and ask that you respect the spa’s scheduling policies as your spa treatment time is reserved especially for you. Should you need to cancel or reschedule, we ask that you kindly give us at least 24 hours notice.  This courtesy enables us to compensate our employees for their time, and maintains a higher availability of our time for you as well as others. It also allows us to offer the time to another client. Regretfully, if we do not receive 24-hour notice of cancellation, you will be subject to a $25 cancellation fee. Any no shows will be charged 50% of the scheduled service. A credit card may be required at the time of booking any service.


Product Return Policy

Product may be returned within 14 days of purchased if it is unopened and unused. Product that has been used may be returned if client experienced a reaction — this will be evaluated on a case-by-case basis by the aesthetician. Products with expiration dates may not be returned for after product has expired.

Refunds will be made in the same form as original payment. Credit card purchases will be refunded back to the original on which the product was purchased. If you would like, a credit may be applied to a gift card to use toward future products and/or services from DayGlo Med-Spa.