Our Team
Director of Clinical Research
Mariana Carvalho
Director of Clinical Research
Mariana Carvalho is dedicated to bridging the gap between medical professionals and the clinical research industry. With a Master’s degree in Clinical Research from NYU and extensive experience in the field, Mariana has a proven track record of helping clinical research sites navigate the complexities of clinical trials, from site development to regulatory compliance.
Beyond her professional achievements, Mariana is also an avid marathoner, often seen training for her next race in the early morning hours. When she’s not on the track, you might find her perfecting her latte art as a passionate barista enthusiast or spending time with her beloved 6-year-old English Bulldog, Blossom. Her diverse interests and dedication to both her personal and professional life make her a dynamic and approachable leader in the field of clinical research.
PA-C Sub-Investigator
Kristyn Cullen
PA-C Sub-Investigator
Kristyn Cullen, PA-C is a certified Physician Assistant specializing in the practice of Dermatology. She has completed the Society of Dermatology Physician Assistants Diplomate Fellowship Program and is an active member of the American Academy of Physician Assistants.
Kristyn Cullen, PA-C attended the University of Connecticut Honors Program graduating Summa Cum Laude with a Bachelor of Science degree. She went on to earn her Master of Medical Science in Physician Assistant Studies at Nova Southeastern University in Fort Lauderdale, receiving highest honors.
Kristyn Cullen is originally from North Haven, Connecticut. She now makes Miami her home. She is pleased to be serving the South Florida community by helping to establish and meet individual skincare needs. Her other interests include golf, tennis, skiing and traveling.
Clinical Research Coordinator
Daine Velazco
Clinical Research Coordinator
Daine Velazco is committed to maintaining the highest standards in clinical research, ensuring that each trial is conducted with precision and adherence to protocol. With two years of experience as a Clinical Research Coordinator, Daine has successfully managed multiple trials, drawing from her deep understanding of quality control. Originally from Cuba and now based in Miami, she is fluent in both Spanish and English, which allows her to effectively communicate with diverse patient populations.
Outside of her professional life, Daine is a culinary explorer, passionate about discovering new cultures through their cuisine. You’ll often find her at different restaurants, savoring dishes from around the world. Her love for food and dedication to excellence in her field make her a well-rounded and engaging professional in the world of clinical research.
Office Manager
Ethel Itzkowitz
Office Manager
Etty Itzkowitz has enjoyed working with Dr. Sullivan’s office for the last 25 years, where she has been involved in a wide range of responsibilities. From warmly greeting patients as they arrive to assisting them in securing approval for their essential medications, her role has been centered around providing compassionate and comprehensive support to ensure the best possible care for our patients. Currently, she serves as the office manager, overseeing daily operations and ensuring that our patients receive the best possible care and support.
Naomi
Clinical Research Coordinator
Naomi Crespo, RCMA, is a seasoned healthcare professional who brings more than 20 years of hands-on experience as a medical assistant to her role in clinical research. A graduate of Pima Medical Institute in San Diego, she has spent the past 3.5 years coordinating studies and now serves as the primary coordinator for the CorEvitas registry, overseeing both the ongoing psoriasis and atopic dermatitis registries. Naomi’s depth of clinical expertise and meticulous attention to protocol have made her an indispensable leader in managing multiple dermatology trials at ZiaDerm Research.
Originally from New York, Naomi has built a rewarding professional life in Florida, where her warmth and dedication resonate with patients and colleagues alike. Outside the clinic, she enjoys perfecting new recipes in the kitchen and caring for her family—pursuits that reflect the same commitment and heart she brings to every study she coordinates.
MD Principal Investigator
Tory Sullivan
MD Principal Investigator
Dr. Sullivan is a Board Certified Dermatologist and a member of the American Academy of Dermatology. Trained in diagnosing and treating conditions of the skin, hair and nails, he is also an expert in performing advanced therapies meant to improve their health and appearance.
Dr. Sullivan attended Georgetown University as an undergraduate and received his medical degree from Vanderbilt University Medical School. He then moved to Miami to complete his residency in Dermatology at the University of Miami, where he continues to be an active part of the South Florida dermatologic community. Dr. Sullivan is a voluntary assistant professor at the University of Miami Department of Dermatology and Cutaneous Surgery. As a primary investigator for clinical research, he has completed more than 40 clinical trials testing new dermatology medicines and cosmetic treatments for FDA approval. In addition to publishing his findings widely, Dr. Sullivan travels the country to lecture on new advancements in the treatment of skin conditions.
Originally from New Mexico, he has lived in Miami and Ft. Lauderdale for over 20 years. When he is not in the office, Dr. Sullivan enjoys spending time with his partner and two young daughters.
Clinical Research Coordinator
Katelyn Louis
Clinical Research Coordinator
Katelyn Louis, is a highly skilled Clinical Research Coordinator with a strong academic and practical background in scientific research. She holds a Master’s Degree in Science from the University of Central Florida, following her Bachelor’s in Science from the University of South Florida. Katelyn’s academic journey has equipped her with a deep understanding of research methodologies and a commitment to advancing medical science. As a native of South Florida, Katelyn is passionate about contributing to her community by playing a crucial role in the coordination of clinical trials. Her attention to detail and dedication to upholding the highest standards of research integrity ensure that each study she manages is conducted with precision and ethical rigor.
Outside of her professional life, Katelyn enjoys exploring new destinations and cherishes quality time with her loved ones. Her enthusiasm for discovery, whether in her work or personal life, drives her to continually seek growth and excellence in all that she does.
Joshua
Recruitment & Research Assistant
Joshua is currently pursuing his Bachelor’s Degree in Psychology and brings a warm, people-centered approach to clinical research. As the site’s primary recruiter, he connects with potential participants, schedules pre-screening appointments, and helps ensure each study starts with engaged, qualified candidates. He also supports the coordination team through data entry and performs quality checks on subject charts to uphold the highest standards of accuracy and compliance. Outside of work, Joshua enjoys spending time with family and friends and has been running a Dungeons & Dragons campaign with his close-knit group for over two years. His creativity, attention to detail, and collaborative spirit make him an integral part of the team.