Medical Director / Co-Owner

Nick Sadeghi, MD

Dr. Nick Sadeghi is a Board-Certified Emergency Medicine physician who made a bold shift after 20 years in the traditional system to create a new, proactive model of care focused on performance, recovery, and longevity. After facing his own physical decline in his 40s — despite doing “everything right” — he discovered the powerful but often-overlooked world of hormone optimization, regenerative medicine, peptide therapy, and cellular health. He became his own patient and found real answers where conventional medicine fell short.

Now, through Sadeghi Medical and his personalized Longevity Code framework, he helps others reclaim energy, strength, and clarity with customized, science-backed solutions. His mission is simple: to rewrite the story of aging — with truth, strategy, and results.  Click Here If you want to learn more or would like a consultation with Dr. Sadeghi!

Officer Manager

Stephani Williamson

After 18 years of serving in the Navy as a skilled mechanic, Stephani has brought her unmatched work ethic, precision, and dedication to excellence into the world of aesthetics. Now as Office Manager at Esti & Co., she’s the engine behind our smooth day-to-day operations — handling scheduling, client communication, and team coordination with care and efficiency.

Her attention to detail and passion for supporting others create a warm, welcoming environment for both estheticians and clients alike. Whether she’s managing logistics or helping someone feel seen and supported, Stephani is the heart of our front office and an essential part of the Esti & Co. experience.

Founder/ Co-Owner / Injector 

Heather Aoun, PA-C

Heather Aoun, PA-C, is the founder of Esti & Co. and a seasoned medical professional with over 15 years of experience in Internal and Emergency Medicine. A U.S. Army veteran, visionary entrepreneur, and mother of four, Heather created Esti & Co. with a clear mission: to build a supportive, collaborative space where estheticians don’t just work — they thrive.

Blending her deep medical expertise with an artistic eye, Heather brings precision, creativity, and compassion to everything she does. As an experienced aesthetic injector, she is known for achieving beautifully natural and balanced results that enhance her clients’ confidence and features. Her transition into aesthetic medicine was a natural evolution, rooted in her passion for beauty, wellness, and helping others feel empowered from the inside out.

Heather is also a multi-talented creator — from designing one of the world’s top-rated escape rooms to curating elevated spaces that inspire. At Esti & Co., she’s more than a provider; she’s a mentor, a motivator, and a champion for estheticians ready to grow their business with confidence and community.

Lead Aesthetician and Trainor

Destinee DiGiovanni

As Lead Aesthetician and Lead Trainer at Esti & Co., Destinee DiGiovanni brings over a decade of experience in skincare, advanced aesthetics, and permanent makeup. With a deep passion for helping both clients and fellow estheticians succeed, Destinee plays a key role in setting the standard for excellence, education, and results within the Esti & Co. community.

Her advanced training in therapeutic massage techniques enhances every treatment, blending intuitive touch with cutting-edge skincare for a deeply restorative experience. As a licensed Advanced Aesthetician and skilled permanent makeup artist, she specializes in customized facials, ombré brows, and holistic treatments — always with a preference for vegan-friendly and organic products whenever possible.

Destinee’s commitment to natural beauty, client education, and hands-on training makes her a trusted leader and mentor at Esti & Co., where growth, empowerment, and results are always the priority.