Founder of Advanced Skin Medspa
Marissa Martínez-Thiele
Marissa is a trusted and highly sought-after skincare expert and medical aesthetician in the Hudson Valley, bringing 19 years of hands-on experience to the aesthetic industry. Her career began in 2006 after graduating from the Hudson Valley School of Advanced Aesthetic Skin Care. She quickly launched her path in aesthetics at a top-tier medical spa in midtown Manhattan and has since worked in some of New York City’s most reputable cosmetic surgery centers and medspas.
Known for her genuine and results-driven approach, Marissa combines deep industry knowledge with an intuitive, customized touch. Her dedication to excellence continues to attract loyal clientele from the Hudson Valley to NYC and beyond. She believes no two clients—and no two skins—are the same, and she specializes in tailored treatment plans that deliver noticeable, lasting results.
Marissa holds a degree in science, graduating with honors, and is currently pursuing a nursing degree. She also earned a degree in fitness and wellness, which complements her holistic view of skin health and overall well-being. Her lifelong passion for continuous education is evident in her ongoing quarterly trainings and certifications in the latest technologies and techniques, particularly in laser and energy-based devices.
In addition to her clinical work, Marissa trains for multiple laser companies, providing hands-on instruction to dermatology offices, plastic surgery practices, and medical spas throughout the East Coast and Canada. She is also recognized as one of the leading providers of the DermaV laser throughout North America, offering advanced expertise in vascular treatments and comprehensive skin revitalization. Marissa has had the privilege of training hands-on with some of the leading developers and scientists in laser technology, including Dr. Nikolai Tankovich, further deepening her expertise and insight into cutting-edge aesthetic innovations.
She is an active member of the American Society for Laser Medicine and Surgery (ASLMS) and the Association of Skin Care Professionals (ASCP). Her specialties include anti-aging and corrective skincare using advanced modalities such as chemical peels, Hydrafacials, microneedling, LED therapy, and state-of-the-art laser and radiofrequency technologies.
As spa director of ASM, Marissa not only treats patients but also trains fellow clinicians in best practices for medical-grade treatments. She is well-loved for her honest, compassionate approach, and her commitment to client education—especially her belief that skincare is a lifelong practice, much like fitness or nutrition.
Outside the treatment room, Marissa teaches group fitness classes and stays busy raising her two children, Joshua and Genevieve, alongside her husband, Joshua.
Patient Care Coordinator/Practice Manager at Advanced Skin Medspa
Jackie Burgos
With nearly 20 years of experience in plastic surgery, aesthetics, and patient coordination, Jackie Burgos is the core of Advanced Skin Medspa’s patient experience. Her extensive background in luxury cosmetic practices and surgical settings has equipped her with the rare ability to guide patients confidently from consultation to completion, ensuring clarity, comfort, and trust at every step.
Jackie is known for her exceptional communication skills, calming presence, and genuine passion for helping patients feel seen and understood. She excels in treatment planning and education, helping clients not only set realistic aesthetic goals, but also truly understand their options and outcomes. Her deep knowledge of both surgical and nonsurgical procedures allows her to translate complex recommendations into personalized, achievable plans.
At ASM, Jackie embodies the connection between advanced technology, artistry, and patient care. Her ability to anticipate needs, provide concierge-level support, and deliver a warm, elevated experience makes her an irreplaceable leader and beloved guide to every patient who walks through our doors.
Nurse Injector at Advanced Skin Medspa
William Espinoza, RN
Born and raised in Newburgh, New York, William Espinoza is a bilingual registered nurse with a strong clinical foundation in medical/surgical and a continuous, developing aesthetic medicine background. His continuous training with the Allergan Medical Institute, as well as under the guidance of a board-certified plastic surgeon and leading facial balancing experts has elevated his ability in achieving balanced, subtle enhancements with confidence. William brings a meticulous, results-driven approach to every patient interaction, with a focus on subtle enhancements that preserve each client’s natural beauty. Fluent in both English and Spanish, he is dedicated to helping patients feel confident, refreshed, and authentically themselves.
Esthetician at Advanced Skin Medspa
Sarah Shuttleworth, LE
A Capri Cosmetology School graduate and Hudson Valley native, she pairs science-backed technique with a genuine passion for helping each guest achieve their ideal complexion.
What to expect when you’re in her care
• Thorough consultations that translate your skin goals into a clear, step-by-step plan
• Targeted facials designed to calm, correct, and visibly boost radiance
• Comfortable, effective laser hair removal for long-lasting smoothness
• Practical home-care advice so your results keep building between visits
Sarah’s mission is simple: leave your skin healthier, brighter, and closer to your “dream-skin” vision every time you walk out our door.
Ready to book your first appointment? Reserve online through the link in bio or call 845-392-2111. We can’t wait for you to experience her expertise.
Mrudangi Thakur, MD
Dr. Thakur, a board-certified plastic surgeon, has been serving the Westchester, NY community since 2006. With a fervent dedication to enhancing patients' lives, she graduated from medical school in India with top honors, securing the first place among female candidates nationwide and earning the prestigious President's Medal. Following this, she honed her skills in England for four years, focusing on plastic surgery, before undertaking rigorous training at Montefiore Medical Center in NY upon her arrival in the United States.
Drawing from her diverse background, Dr. Thakur has also contributed to the burn unit at Jacobi Medical Center. Currently residing in Westchester, NY with her husband and two daughters, she is committed to delivering the highest level of care with compassion.
Renowned for her expertise in body contouring, facial surgery, and reconstructive procedures, she strives to fulfill her patients' goals with excellence and empathy.