Christopher Ciantar will represent the Nationalist Party on the board of the Environment and Resources Authority following the resignation of Simon Mizzi after three years in the role.
In a statement, the PN said Mizzi resigned for personal reasons.
Ciantar is a graduate of mechanical engineering and has a doctorate in environmental engineering.
He has a particular interest in the circular economy and is currently carrying out research in the field, particularly on biofertilisers.