Wicky entered the 24 Hours of Le Mans in 1960 and 1961 with an AC Ace, winning the 2.0 GT class in 1960.

He returned to Le Mans in 1966, and raced every year until 1975, campaigning Porsches.

Occasionally Wicky campaigned other marques besides Porsche; in 1974 he entered a BMW 3.0CSL for Brun, although it retired after one lap, and a De Tomaso Pantera for Max Cohen-Olivar and Philippe Carron, which retired after 16 laps.

At the 1963 Mediterranean Grand Prix, he drove a Lotus 24 for Scuderia Filipinetti, and achieved his best Formula One result of ninth from 11th on the grid.

He subsequently bought the Lotus and entered it in the next two Syracuse Grands Prix, but found little success with the car, only able to repeat his ninth-place finish in the 1965 race, albeit a distant last.