Perrot began racing in 1956 in regional slalom events in Switzerland. In the early 1960s he worked as a rallying co-driver alongside his Swiss friend Peter Ettmüller, racing under the Squadra Tartaruga banner. In 1963 the pair finished sixth in the Rallye Wiesbaden in a Fiat-Abarth 1000 Bialbero. Perrot simultaneously turned to hillclimbing, driving an Abarth-Simca 1300 to twentieth overall at the Ollon-Villars in 1963. By 1966 he was campaigning a Lotus 23-Ford in hillclimb events, finishing ninth at Sierre-Montana-Crans, and also made appearances in circuit races at Tulln-Langenlebarn and Wien Aspern.
In 1968 Perrot moved into single-seaters, joining the European Formula Two Championship with a Squadra Tartaruga Brabham BT23-Cosworth. His first season was difficult, with a tenth place at Hockenheim among the notable classified finishes. In 1969 he improved, scoring eighth at Tulln-Langenlebarn — a result that earned him three championship points because four FIA-graded drivers ineligible for points (Jochen Rindt, Jackie Stewart, Graham Hill, and Jean-Pierre Beltoise) had finished ahead of him. Later that season he competed in the Formula Two class of the German Grand Prix at the Nürburgring, the race appearing in the Formula One World Championship calendar. Starting from twenty-fourth on the grid in his Brabham BT23C, he finished tenth overall and sixth in the Formula Two class. Although this gave him a classified result inside a World Championship Formula One event, Perrot never competed in a full Formula One World Championship race itself.
In 1970 Squadra Tartaruga acquired a March 702, the first customer car sold by the newly formed March Engineering company. On 2 August 1970, Perrot delivered March its first Formula Two victory when he won the non-championship Preis von Deutschland at the Nürburgring. He continued in Formula Two in 1971 with a March 712M fitted with a Cosworth FVA engine tuned by Swiss engineer Galvani, finishing third at Imola in a non-championship race and eighth at Hockenheim. During the winter of 1970–71, his compatriot Jo Siffert invited Perrot to join him in the two-race Temporada Colombiana Formula Two series in Bogotá. Siffert won the first race; Perrot finished sixth. In the second round Perrot was classified thirteenth.
On 13 June 1971, Perrot made his second appearance in a Formula One event, driving Siffert's ex-works March 701 in the non-championship Jochen Rindt Memorial Trophy at Hockenheim. He finished eleventh.
In 1972 Perrot continued in Formula Two with the March 722, scoring points in three races including fourth and fifth places at Hockenheim events and sixth at Mallory Park, ending the season thirteenth in the championship with eight points.
Perrot's greatest achievement came alongside his 1972 Formula Two campaign. Racing his March 722-Cosworth in hillclimb events, he won six outright victories to take the European Hill Climb Championship: at Ampus-Draguignan and Mont Ventoux in France, at Dobratsch in Austria, at Montseny in Spain, at Freiburg-Schauinsland in Germany, and at Saint-Ursanne-Les Rangiers in Switzerland — where he had already won in 1971. He also won a national event at Marcharuiz. Contemporary press referred to him as the "Bergkönig" (King of the Mountain).
Perrot retired from racing in 1973 to concentrate on his garage business in Zürich. He maintained a connection to Swiss motorsport through his friendship with Peter Sauber, working with him when Sauber founded his racing team. Perrot died in Zürich on 8 December 2008, aged 76, after a long illness.