Meet The Team
ERICKA MARSHALL
FNP-BC | FOUNDER
As a dedicated board certified – Nurse Practitioner, Ericka Marshall (Exercise Science – UT-Knoxville, BS Nursing – East Tennessee State University, MS Nursing – Lincoln Memorial University) has always been driven by a desire to make a meaningful impact on people’s lives. After years of working with various companies, she became increasingly aware of the lack of quality in the healthcare and aesthetic industry. With a strong belief that quality should never be compromised, she set out to create a personalized, quality-driven approach dedicated to prioritizing patients above all else, which led her to establish ONYX Wellness & Aesthetics. Ericka believes that aesthetics and longevity medicine work synergistically to enhance inner vitality allowing one to feel confident and vibrant at any age. By integrating advanced aesthetic treatments with evidence-based longevity practices, she helps clients unlock their full potential and embrace their unique beauty. Ericka emphasizes the importance of preventative care and optimizing health. She takes pride in being honest and upfront with clients about their suitability for specific treatments, rejecting the notion of quick profits in favor of building long-term relationships. Her approach is rooted in trust, transparency, and exceptional results as she guides patients through their individual journeys. By focusing on sustainable outcomes and genuine connections, Ericka is committed to delivering an elevated experience that empowers clients to look and feel their best.
Ericka has trained with the top & most respected providers in the industry to improve her knowledge and skills as an injector and provider to deliver her clients the highest quality and safest services. She is constantly pursuing more industry knowledge and skills to provide the best treatment plans for her patients. She is a member of the International Peptide Society and certified in Peptide Therapy and Clinical Weight Management.
LILY HOGAN
Practice Manager
TESSA MASON
BSN, RN
Tessa is equal parts science, artistry, and a little bit of glam. With more than 10 years of experience in the aesthetics industry, she specializes in combining injectables, advanced skincare, and energy-based treatments to create personalized, natural-looking results.
Born and raised in East Tennessee, Tessa traded the mountains for Nashville’s music and energy more than nine years ago. She earned her Bachelor of Science from East Tennessee State University in 2010, began her career as an aesthetician, and later returned to school to earn her nursing degree—expanding her expertise and her ability to help clients look and feel their best.
Known for her thoughtful approach, technical skill, and artistic eye, Tessa believes aesthetic treatments should enhance what makes each client unique. Think of her as your beauty best friend—one who understands facial anatomy, loves a great before-and-after, and always prioritizes balanced, confidence-boosting results.
Tessa also serves as a national trainer for Sylfirm X, helping other providers strengthen their skills and deliver exceptional patient outcomes.
When she is not treating clients or training fellow professionals, Tessa enjoys spending time with her daughter—her mini-me, built-in best friend, and occasional reminder that she does not always get to be the boss.
Whether you are looking for subtle refinement or a complete treatment plan, Tessa is here to help you feel confident, refreshed, and completely yourself.
ONYX Wellness & Aesthetics