Elected general secretary of the International Trade Union Confederation (ITUC) at the organisation's 5th World Congress in Melbourne, Australia, in mid-November 2022, he stood aside on 14 December 2022 following his arrest and conditional release in relation to the Qatar corruption scandal at the European Parliament.

[1][2][3][4] On 11 March 2023, the ITUC General Council voted to dismiss Visentini for accepting funds from Antonio Panzeri.

In the same year he was selected as General Secretary of UIL’s Federation for Tourism, Trade and Services in Friuli-Venezia Giulia.

[10] In December 2022, just days after being elected as General Secretary of ITUC, Visentini was arrested as part of the Qatar corruption scandal at the European Parliament in which Qatar had allegedly paid large sums of cash for influence at the European Parliament.

[4] Visentini was President of ISSES, UIL Trieste’s research institute for historical, economic and social studies (2006–2011), President of the Friuli-Venezia Giulia branch of UIL’s vocational education and training provider ENFAP (2002–2006), and on the board of Italian International Research Centres Elettra-Sincrotrone and AREA Science Park.