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Meet Our Med Spa Staff

A big reason women and men keep coming back to Rejuvenate! for nonsurgical aesthetic treatments is our people. The members of our med spa staff in Denver and Golden, Colorado, are not only highly trained and experienced, they are personable and truly care about helping our clients look their best. You can get to know them a bit by reviewing their bios on this page.

Sara Kubik RN, BSN, CANS, Rejuvenate Manager

Sara earned her Bachelor’s degree in Human Development and Family Studies at Colorado State University and went on to earn her Bachelor of Science Degree in Nursing from the Denver School of Nursing.

She is a Certified Aesthetic Nurse Specialist with over 12 years of injection experience. Sara has also been the medical spa manager for over 8 years at The Center for Cosmetic Surgery’s non-surgical side of the practice, Rejuvenate!, located in Golden, Colorado. She is a nationally recognized speaker and trainer for Galderma (makers of Dysport and the Restylane family of fillers) and Allergan (makers of Botox and the Juvederm family of fillers).

Sara welcomes the opportunity to use her expertise in medical aesthetics to help you to look and feel your best.


Ann Marie O’Brien, RN, BSN, CANS

Ann Marie has been in the healthcare field for over two decades. She graduated with her Bachelors of Science in Nursing from D’Youville college in Buffalo, NY and has varied nursing experience ranging from ICU to Labor and Delivery.

She has been in aesthetics and plastics for the last 12 years and even worked for Galderma (makers of Dysport and the Restylane family of fillers) as a medical science liaison. Ann Marie has been a nurse with the Center for Cosmetic Surgery and Rejuvenate! for the last 11 years in a range of positions from OR to post-operative recovery and clinic Pre-op, and has spent the last 9 years injecting and performing laser treatments at Rejuvenate.

Ann Marie is passionate about helping her patients achieve their aesthetic goals, and she is constantly continuing her education by attending trainings and conferences to make sure that she is up-to-date on all products, treatments and techniques.


Ashlee Fifer, RN, BSN, CPSN

Ashlee is a registered nurse with over 15 years of experience and has been with the Center for Cosmetic Surgery and Rejuvenate! for almost a decade.

Since 2008, she has practiced in aesthetics and plastic surgery and has extensive experience with injectables, skin and laser treatments. She understands that each individual is unique and every treatment she performs is customized to deliver the best outcome for each her patients. Her experience and careful attention to detail leads to results that accentuate a patient’s inherent natural beauty, whether it is a focus on restoring a youthful look, camouflaging imperfections or enhancing their natural beauty.

Ashlee’s unbridled passion for her craft is evident in her dedication to continuing education and providing the newest, safest and most advanced techniques. She stays up-to-date on all of the latest techniques and products by training with top nurse injectors, doctors and surgeons, attending national conferences and hands-on demonstrations by industry and product experts. She is a Certified Plastic Surgical Nurse (CPSN) and will sit for her Certified Aesthetic Nurse Specialist (CANS) certification this spring.

In her spare time, Ashlee enjoys spending time with her son, family and friends. She is an avid reader and loves the outdoors. She enjoys traveling, cycling, skiing and rock climbing and is the type of gal whose hiking shoes sit right next to her high heels. She loves all things beauty-related, fashion and loves to explore the many new restaurants in the Denver area.


Rachel Corley, RN, BSN, CANS

Rachel has been an RN and aesthetic nurse since 2009 and has been with Rejuvenate since 2014. She earned her Bachelors in Nursing from San Diego State University, and began her career in San Diego following college but came home to Colorado to start a family.  Rachel enjoys learning and challenging herself, and in 2015 she became a Certified Aesthetic Nurse Specialist (CANS). CANS is the highest level of training for aesthetic nurses, and requires a significant amount of education, training, and experience to obtain, as well as mandatory re-certification every 3 years after 45 hours of continuing education is completed.

Rachel loves the blend of art and science that medical aesthetics offers, and she takes pride in being able to help her patients aesthetically via injectables or laser treatments.


Angie Lessard, Licensed Aesthetician

Angie’s passion to help others led her to the health and wellness industry where she has been involved for over 15 years. With a love for art and science, she’s continued to develop herself professionally within the field of medical aesthetics. Angie specializes in providing her patients with the knowledge, and current tools to help them reach their personalized skin care goals.

In her spare time, this Colorado native enjoys playing with her dog Stella, attending concerts at Red Rocks, watching the TV show “Friends,” shooting hoops and spending quality time with friends and family.


Callea Mahagan, Licensed Aesthetician

Callea is a Colorado native raised in Castle Rock. She attended Colorado Mesa Universtiy and studied Kinesiology. With hopes of becoming a Physical Therapist she was always drawn to the science of skin. In 2012 she graduated from College of International Esthetics. In 2014 she furthered her education and added additional certifications to become a Certified Laser Technician and Cosmetic Tattoo Artist.

With a background in advanced medical aesthetics, Callea marries the science of skincare with a natural artistic ability. She loves enhancing her patients’ natural beauty with each person’s unique features and specific skin care needs.

Her approach to skincare is simple: everyone can have beautiful and healthy skin when they are given proper education and guidance.


Christine D’Ugo , Licensed Aesthetician, Medical Assistant

Christine has been a practicing Licensed Aesthetician and Medical Assistant for over 15 years. Some of her specializes include: Cosmetic and Product Consults, Dermaplaning, Chemical Peels, Microdermabrasion, Hydrafacial, Microneedling, Intense Pulsed Light (IPL/Photofacial), Laser Hair Removal, and 1540 Fractional Non-Ablative Laser. Christine is always looking for the best combination of treatments and skin care products customized for your specific skin care needs. Having had her first dermatology appointment at the age of 11, she understands the importance of treatments, plus proper skin care products and maintenance, which is especially challenging in Colorado.  “I always tell my patients, ‘skin care is who I am, not just what I do, and it is an honor to take care of you,’”

Christine is a Veteran of the US Army, enjoys spending time with her two daughters, growing vegetables in her garden, reading, volunteering on her HOA board, and treating everyone, everywhere with respect.


Marissa Griffanti, Licensed Aesthetician, CoolSculpting Specialist

Marissa’s passion for medical aesthetics and skin care led her to become a licensed aesthetician in 2015. She has been the CoolSculpting specialist at Center for Cosmetic Surgery since 2017, and has received extensive training at CoolSculpting University in California. Marissa loves CoolSculpting and working in this industry because she wants to help her clients look and feel their best at any age.

A California native, Marissa moved to Denver in 2013 and quickly embraced all that Colorado has to offer.  In her spare time, she enjoys being outside hiking or skiing, drinking a craft beer, and she loves to hang out with her dog.


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