Professor Ryan is a Consultant Dermatologist at the Institute of Dermatologists and Blackrock Clinic, and is a Clinical Professor at University College Dublin. She co-founded the Institute of Dermatologists in 2019. Prof Ryan attained a first class honours medical degree at University College Dublin where she graduated first place in her medical class. She commenced her training as a Dermatology Specialist Registrar at St. Vincent’s Hospital and completed a dermatology residency and research fellowship at the esteemed Baylor Dermatology Residency program in Dallas, Texas. She remained on faculty in Dallas as Clinical Associate Professor of Dermatology for the Texas A+M Health Science Center and Vice Chair of the Department of Dermatology at Baylor University Medical Center, Dallas.

Professor Ryan has published a textbook on psoriasis, 7 book chapters, an encyclopedia chapter, and over 70 articles in peer-reviewed medical journals, including first author articles in JAMA and The Lancet. She regularly presents at international dermatology conferences. She has conducted both scientific and clinical research in psoriasis and has been the Principal Investigator for multiple drug trials in psoriasis and eczema.

Professor Ryan specialises in medical and cosmetic dermatology. Her main areas of medical dermatological interest include psoriasis, skin cancer, acne, atopic dermatitis (eczema), and hair loss.

Professor Ryan has a considerable interest in medical education, particularly with regard to psoriasis education. She was appointed as a councillor of the International Psoriasis Council, and is a Fellow of the American Academy of Dermatology, a Fellow of the Royal College of Physicians Ireland, and a member of the British Association of Dermatologists, the Irish Association of Dermatologists and the British Society for Cutaneous Allergy.