Previously Zingarelli was an independent board member of Fastweb, the second largest Italian fixed line TelCo.
In 1980, Zingarelli started working at CSELT (Centro Studi E Laboratori Telecomunicazioni), Telecom Italia's research centre in Turin, where he worked in the radio transmission division and managed activities on both fixed and mobile radio transmission.
He then worked for Alenia, Italy's main aerospace company based in Turin, where he was in charge of radio communications for both civil and military systems.
From 2002 to 2005, he was the global director of networks and service platforms at Vodafone Italy (formerly Omnitel), in charge of managing all the group's technology activities and strategy, including customer terminals.
[3] Since 1991 Zingarelli has been an aggregate Professor at the Polytechnic University of Turin, Italy, where he held courses on electronic communications and digital transmission.