About
Jessica St. Jean, NP-C, Owner of JSJ Aesthetics
Jessica St. Jean, MSN, FNP-C is a board-certified Family Nurse Practitioner and the founder of JSJ Aesthetics & Wellness, established in 2014. With locations in Methuen, MA; Salem, NH; and the newest addition in Medford, MA, Jessica has grown her practice into one of the largest and most sought-after medical spas in New Hampshire.
Jessica began her healthcare career in 2004 at Brigham and Women’s Hospital in Boston, caring for post-thoracic surgery patients. Her work as a nurse inspired her transition into aesthetic medicine, combining her clinical expertise with a passion for wellness and beauty.
At JSJ Aesthetics, Jessica offers a wide range of advanced cosmetic and wellness services. These include Botox, dermal fillers, Hydrafacial, SkinCeuticals treatments, Sylfirm X, Ultherapy, PDO Max thread lifts, microneedling, and more. Her wellness offerings feature bioidentical hormone replacement therapy, peptide therapy, medical weight loss, sexual wellness treatments, urinary incontinence solutions, IV hydration, and nutrition counseling.
A respected leader in her field, Jessica is also a highly regarded aesthetic trainer. In 2018, she was selected as a Faculty Member for the Galderma Aesthetic Injector Network (GAIN), allowing her to merge her clinical expertise with her love for teaching. In 2020, she became a trainer for PDO Max, where she educates medical professionals on thread lifting and collagen stimulation techniques. She also offers private training sessions to fellow injectors across the region.
Jessica holds a Bachelor of Science in Nursing from the University of New Hampshire (2003) and earned her Master of Science in Nursing from Rivier University (2019). She is a proud member of the Massachusetts Nurses Association and Sigma Theta Tau.
Her dedication and impact in the industry have not gone unnoticed—Jessica was named the #1 requested trainer in New England in 2022 and was recently honored to speak at a national Galderma virtual training event. Her genuine rapport, compassion, and commitment to excellence continue to inspire loyalty from her patients and peers alike.
Sarah Hanson
Sarah is a Registered Nurse holding her license in both Massachusetts and New Hampshire. She began her career in the medical field in 2015 as a Medical Assistant in Primary Care and Dermatology in Boston MA. She became an RN in 2019 and from there practiced in Urgent Care, Medical-Surgical, Oncology, and Psychiatric Nursing. Sarah has always had a passion for wellness and self care and also received her Aesthetician License in 2008 from Elizabeth Grady. Sarah began working in Medical Aesthetics in 2020 and joined the JSJ team in September 2021.
Danielle Ayotte
Medical Office Manager, Certified Medical Assistant, Medical Aesthetic Consultant, Team Leader.
Danielle has received her ABS in Medical Management and has been a certified Medical Assistant for over 20 years. She has a wealth of knowledge in medical aesthetic and regenerative medical procedures and has both assisted in and performed many procedures. Over the last two years Danielle has focused her career on Customized Consultation, educating and guiding clients on anti-aging procedures, options, and Creating a unique long-term plan for each individual client.
She is thrilled to join this incredible team as Medical Manager bringing her years of experience to JSJ Aesthetics and Wellness! Danielle resides in Pelham, NH with her three beautiful boys.
Malazia Nassiff
Malazia is a graduate of Salem High school who has always loved everything beauty with her eye for detail. She then graduated Catherine Hinds Institute of Esthetics in 2015 as a Master Esthetician and Professional Makeup Artist, with doing over 100 weddings in the last 7 years.
She is knowledgeable in numerous of skincare lines like SkinCeuticals, Allastin, while also bringing a variety of services to JSJ.
Malazia specializes in skincare treatments like HydraFacials, while also servicing brow services such as brow waxing, threading, lamination, brow tint and henna. Her main love is bringing out the natural beauty in those doing makeup! On days she isn’t at JSJ, she is enjoying motherhood of her son and being around her loved ones.
Brooke Lemaire
Brooke is a dedicated and detail-oriented professional in the medical aesthetics space, recently graduating from the University of New Hampshire in May 2025. She currently works alongside Jessica, supporting both clinical and operational aspects of the practice to ensure an exceptional client experience from first contact to post-treatment care.
Her responsibilities include assisting with client procedure work-ups, performing phone triage, managing scheduling, addressing client concerns, and handling check-ins and check-outs. She also supports overall office management, helping to maintain an efficient and welcoming environment where clients feel informed, comfortable, and cared for.
With a strong foundation in patient care and a growing interest in the business and clinical sides of aesthetics, she is passionate about learning the latest technologies, refining client communication, and helping people feel confident in their skin. Her goal is to continue growing within the beauty and wellness industry, combining medical knowledge, hands-on experience, and a personalized approach to client service.
Danielle Tiernan
Danielle is our newest member to the JSJ team. She is a Registered Nurse that graduated from Northeastern University in 2000 with her Bachelor of Science degree in Nursing. She holds her license in both Massachusetts and New Hampshire.
Danielle began her career in Boston working at Brigham and Womens Hospital caring for the complex needs of post surgical patients. She happily spent the next over 20 years there until she decided to change her career goals to that in the aesthetic world. She is now constantly advancing her knowledge on the most current beautifying procedures offered. Receiving multiple certifications and attending hands on credited aesthetic classes. She is enthusiastic and determined to help every client feel better and achieve their skin care goals. Patients love her warm, inviting and caring demeanor.
Danielle is now offering hormone replacement consultations, neurotoxins, ultratherapy, PRP, PRF, Sculptra, microneedling, vitamin and iv therapies.
Danielle lives in Londonderry with her husband Tim and two daughters. She loves spending time with her family, going to the gym, and hiking in the beautiful mountains that NH has to offer. Please follow Danielle on Instagram @rninjectordanielle
Dianara Torres
Dianara Torres is a licensed practical nurse who graduated in 2020 from the esteemed American School of Nursing and Medical Careers. With a specialization in Pediatrics and substance abuse, she has honed her skills and expertise in these critical areas of healthcare. Driven by her unwavering commitment to professional growth, Dianara is currently pursuing her goal of becoming a register nurse by enrolling in classes at Rivier University, with an expected completion date in 2024.
In her current role, Dianara diligently supports Jessica in executing client procedures and facilitating seamless connections between clients and the essential services they require. Additionally, she adequately manages the scheduling of pre and post-treatment appointments, as well as efficiently triaging phone calls.
The captivating field of aesthetic nursing has swiftly captured Dianara’s heart, she considers it an absolute privilege to be part of this remarkable team. As she works alongside Jessica, Dianara eagerly absorbs knowledge and hones her skills, with the ultimate aspirations of becoming a nurse injector in the near future.