Mariella Marcolli has a 30 year experience in accounting; in 2015 she started working in Genesi Uno, PPP Concessionaire for the new Legnano Hospital, in the Administration Department taking also care of all aspects of the Waste Management Service; in 2020 she joined HISI Management holding the same position and working for the PPP Hospitals in Legnano (MI) and Verduno (CN).