In 2014, he won the European Le Mans Series championship in the GTC class at the wheel of a Ferrari 458 Italia entered by the SMP Racing team, along with Russians Devi Matkozov and Anton Ladygin, winning the race at Paul Ricard. In 2015 Beretta raced in the United States where he was runner up in the Pirelli World Challenge series competing for R.Ferri Motorsport and winning three races in a Ferrari 458 Italia GT3. He was also runner up at the Le Mans 24 Hours alongside James Calado and Davide Rigon in the no. 71 AF Corse Ferrari. In 2016 he finished second the Asian Le Mans Series in the GT class. In 2017 Beretta raced in the Blancpain Endurance Cup with the AF Corse 488 GT3 and took part to the Le Mans 24 Hours with the Spirit of Race Ferrari. In 2018 he took part in the FIA WEC Super Season driving the 488 GTE of MR Racing alongside Motoaki Ishikawa and Eddie Cheever III. In 2019, Beretta continued his programme in the FIA WEC with MR Racing, just like 2020.
The Monegasque is a tutor for customers in the Prancing Horse’s non-competitive activities.
With no competitive commitments, Olivier Beretta still didn’t stray far from the world’s most prestigious circuits. At the service of customers of the Prancing Horse's most exclusive programmes, the Monégasque often performed spectacular exhibitions at the wheel of Formula 1 single-seaters. One was at Daytona during the Ferrari Racing Days.