Meet Our Staff

We look forward to assisting you!

Landon Costella

Office Manager

Landon Costella

Landon Costella is the office manager for Dr. Margoles’ practice. He received his Bachelor’s Degree in Communications from SUNY at Geneseo. Landon’s interest in sports and nutrition led him to pursue his Associate’s Degree in Science at Westchester Community College where he graduated with high honors. Prior to working for Dr. Margoles, he was a product developer at the Seagram’s Beverage Company in White Plains, NY.

Landon is committed to ensuring that every patient feel safe, cared for, and ultimately has a great experience. His attention to detail, deep knowledge, ethical business practice and warm personality provides all of our patients with total trust and confidence. No question is too small, and he is always available to make sure that all of your questions are answered.

Fikry B. Salib


Fikry B. Salib

Dr. Salib is a board-certified anesthesiologist who has been practicing in Fairfield County since 1975. He received his training at the State University Hospital, Downstate Medical Center, in Brooklyn New York, and was on the anesthesia staff at the Stamford Hospital in Stamford, CT where he was chairman and President of the Stamford Anesthesiology Services for almost 20 years. He has been in ambulatory anesthesia since 2003 and licensed in both New York and Connecticut. He is Board Certified by the American Board of Anesthesiology and is ACLS certified. He resides in Stamford with his wife Barbara, and his hobbies are tennis, boating, and medical volunteering in the third world.

Heather Brownstein


Bio coming soon

Deana Kosmalski


Deana is the newest addition to the staff having joined Dr. Margoles in the summer of 2022. Deana provides aesthetic and laser treatments to patients in the office, assists during surgery and takes care of patients in recovery. She started her health care career as a Registered Nurse and has been practicing since 2018. She received her BSN from Sacred Heart University and holds nursing licenses in both New York and Connecticut. In addition to working in our office, she is a Labor and Delivery nurse at Stamford Hospital and has her own private duty business focusing on postoperative recovery home care.

Deana was on the dance team in college and is the mother of two sweet baby girls. She is full of energy and is committed to keeping her patients looking and feeling their absolute best! “I love empowering women and men and encouraging them to be/do whatever it is that will make them feel confident and powerful.”

Deana’s favorite words to live and work by: “Passion is energy. Feel the power that comes from focusing on what excites you.”

Tammy Amundson


Tammy Amundson

Tammy our operating and recovery room nurse has over 40 years’ experience as a Registered Nurse in Women’s and Children’s Healthcare. She is a graduate of SUNY and holds nursing licenses in both New York and Connecticut. She currently works in both our office in the Greenwich Hospital Maternity wing providing care in the operating room and post-operative care in the recovery rom. She is passionate about her work and is committed to providing the highest level of care.

Lidia Kowalski

Scrub Technician

Lidia has worked with Dr. Margoles for more than 10 years. Originally from Poland, she was trained in the United States for medical assistance receiving her degree from Norwalk Community College. Since that time, she has worked as a dental assistant, a care giver and as a technician in the operating room. Her time as a caregiver and love of helping people has inspired her to go to nursing school which will help her to grow in the health care field.

Lidia enjoys time with her family and playing volleyball and tennis with her husband and three kids. She loves to cook and bake and has a certificate in culinary arts

Kayla Roballey


Bio coming soon

Gwen Leschinsky


Image and bio coming soon

Judy Polemus

Insurance Specialist

Image and bio coming soon

Kállos Medical Aesthetics Staff (NYC)

Katie Chepiga


Katie is a board certified Family Nurse Practitioner (FNP) who began her nursing career at the University of Delaware, where she earned a Bachelor of Science in Nursing (BSN), and was inducted into Sigma Theta Tau International Honor Society of Nursing. She later graduated with honors from the prestigious Ivy League school, University of Pennsylvania, where she earned a Master of Science in Nursing (MSN).

Ever since she was young, Katie has always been passionate about and showed interest in the field of aesthetics and skin care. She finally decided to pursue her dream after 12 years as an ICU and cardiac nurse and nurse practitioner, and has since attained several aesthetic certifications through rigorous training courses led by world renowned plastic surgeons and dermatologists in both New York City and Beverly Hills.

Katie is dedicated to all of her patients and strongly believes that taking the time to listen to each individual’s concerns and needs and tailoring a patient-specific treatment plan is key to patient satisfaction and optimal results.

Katie has a meticulous attention to detail in all aspects of her life, which is particularly evident in her practice as an aesthetic provider. She also strives and prides herself on maintaining patient safety and well-being by staying up-to-date on the latest research and evidence based practices and enjoys attending conferences and workshops to stay current in this ever-evolving field. Her genuine desire to make a positive impact in the lives of others by boosting their self-confidence through natural, yet effective treatments is what motivates her everyday.

Erin Welch


Meet Erin, our highly skilled and compassionate nurse injector at our new office. With a deep passion for aesthetics and patient care, Erin brings an extensive background in nursing and a commitment to helping clients achieve their desired beauty goals.


Erin has a strong foundation in nursing, having received their Bachelor of Science in Nursing from University of Florida. With fourteen years of experience working in various ICU settings, she has honed her skills in patient assessment, communication, and meticulous attention to detail.

Driven by a genuine desire to enhance natural beauty and boost clients’ confidence. In 2019, Erin pursued further training and certification in aesthetic injectables, including dermal fillers and neuromodulators. With her vast knowledge of facial anatomy and artistic eye, Erin has an exceptional ability to analyze each client’s unique features and create customized treatment plans to achieve natural-looking results.

In addition to her expertise in injectables, Erin is continually expanding her knowledge by staying up-to-date on the latest advancements and techniques through ongoing education and training. Their dedication to professional growth and excellence is evident in their ability to deliver exceptional results and consistently exceed client expectations.


Join us in welcoming Erin to our team of experts at our new office. With her exceptional skills, personable demeanor, and commitment to elevating the client experience, she is dedicated to helping you unveil your natural beauty and achieve your aesthetic goals.