Mission And Vision

At Alyne Aesthetics & Med Spa, we embark on a journey with each patient, crafting a unique narrative of beauty and wellness that resonates with their individual story.

Our goal is to be consistent in providing a first-class medical spa experience for our clients. We strive to be the premier location in the Tracy, Manteca, Lathrop, Stockton, Mountain House, Livermore and surrounding areas where clients choose to have safe, effective, and innovative medical-grade spa services. We aim to create a calm, relaxing atmosphere where vibrant faces and beautiful bodies come to us for natural-looking results. We also are dedicated to providing exceptional customer service as we proudly shape rewarding relationships with our clients, mutually built upon the client experience, our expertise, and our commitment to deliver unparalleled treatment outcomes.

Steve and Jennifer Dulkevich

your trusted partners in beauty and wellness.

Steve and Jennifer have been esteemed business owners in Tracy, CA for over 20 years, dedicated to enhancing the lives of their community through exceptional service and care. Beyond their commitment to aesthetics, the Dulkevichs are active members of Tracy, coaching competitive and high school soccer teams, fostering a spirit of teamwork and achievement in local youth.
Outside of their professional endeavors, Steve and Jennifer cherish family time with their four wonderful children. They find joy in lake days and adventures, creating lasting memories together. Their genuine passion for family and community is at the heart of Alyne Aesthetics Med Spa, where you’re not just a client, but part of a valued community.

Meet Our Medical Director

Dr. Guillermo Castillo, MD

Meet our Medical Director
Dr. Guillermo Castillo, MD

Dr. Guillermo Castillo is Board certified in Family Medicine. He completed residency at The University of San Diego Medical Center. Dr. Castillo’s areas of clinical expertise include preventive and integrative medicine, as well as Aesthetics. In nearly 20 years of practice, Dr. Castillo has amassed experience in every aspect of the health care delivery system. His strategy expertise lies in the integration of genomics and technology to deliver individually tailored health solutions to everyone.

Gisselle Bernal

Aesthetic Nurse

My nursing career began at Stanford Hospital where I worked for two years. During that time I also worked part time as an Aesthetic Nurse. While I loved my experience in the hospital, I quickly realized that my passion lied with Aesthetics! I have been in the Aesthetic Industry for almost four years now and l love providing treatments that empower patients and boost confidence. I’m all about enhancing your natural beauty and celebrating your unique features. 

So if elevating your beauty while remaining natural and true to yourself sounds good, then I’m the girl for you! Being a new mom has given me a whole new perspective on the importance of self-care and I’m more determined than ever to make sure you shine from the inside out. When I’m not at work, I’m with my baby girl and husband enjoying good food, great company, and fun music.

Sophie Blackburn

Aesthetic Nurse

My name is Sophie and I am a registered nurse with a background in emergency medicine and have recently transitioned into the exciting world of aesthetics. Additionally I am an actor working on film, theatrical and voiceover roles so the importance of facial symmetry, movement and expression has always fascinated me. 

 When I’m not at work you can find me reading with my two miniature dachshunds, Coco and Luna, fighting for a place in my lap. I also love to travel, try new restaurants and am a big fan of wine tasting. I look forward to working with you and bringing your aesthetic goals to fruition!

Ashley Simmons

Aesthetic Nurse

Hello there! I’m Ashley, your friendly neighborhood Aesthetic Nurse extraordinaire! With 8 years of nursing under my belt, I bring a unique blend of experience to the table. From cuddling babies in the NICU to patching up playground scrapes as a school nurse, I’ve done it all. But let me tell you, aesthetic nursing is where the real fun is! It’s the vibrant pulse of my career, where I get to blend passion with profession. 

You may have recognized my name- I’ve been serving the Tracy community for some time now- meeting their Botox needs and building strong rapport with my clients! I am now thrilled to join the fabulous Alyne Team. When I’m not perfecting smiles and smoothing wrinkles, you can catch me cheering on the sidelines at the ballfield or watching my daughter’s dance moves at her competitions. With three kiddos keeping me on my toes, life is beautifully chaotic—and I wouldn’t have it any other way!

Jessica Redding


My name is Jessica, I’ve always had a passion for skincare and beauty. I was trained as a “Master Medical Aesthetician” at Acaydia Spa & School in Provo, Utah. I’m Bay Area born and raised, love to be outdoors either on the boat surfing or on the slopes snowboarding so I’m always on top of reapplying my sunscreen! At our spa, I’m committed to providing personalized treatments and skincare routines designed to bring out the best in your skin. I’m excited to help you achieve beautiful healthy skin.

At Alyne, beauty is not just skin deep – it's a harmonious blend of inner wellness and outer radiance!