Jean-Paul Prieels
Prieels, who was once head of research at GSK Vaccines, is also a board member for Immune Health and Pevion.
He joins new chairman of the board Bill Burns.
Riccardo Cortese, CEO and co-founder of Okairos said: "Both Bill Burns and Jean-Paul Prieels have led major pharmaceutical divisions and understand how to take great science through clinical trials to ultimately benefit patients."