Denis Costello is a patient advocate and online communications manager at Eurordis (Rare Diseases Europe), a leading European patient-led non-profit organisation. His role at EURORDIS includes leading digital projects which enhance international collaboration amongst rare disease patient groups and raising public awareness of rare diseases. One such project is www.rarediseasecommunities.org a bespoke social network in 5 languages for patients and families living with rare diseases. Denis is also responsible for the international dimension of the online awareness campaign associated with Rare Disease Day which takes place annually on the last day of February. More information at www.rarediseaseday.org Prior career experiences include running his own technology firm and hosting a daily radio show dedicated to classical music on Irish national radio.