In 1963 Blignaut was first reported to a race of Formula 1, not the World Cup scoring edge Grand Prix at the Kyalami Grand Prix Circuit. In a fielded by Valencia Cooper T53, he was twelfth with four laps behind the winner John Surtees. A year later, he was not considered in the same race with six laps behind Graham Hill. At the Grand Prix of South Africa in 1965, Alex Blignaut reported with a Cooper T55, pulled out his message but back before the race weekend.
In the late 1960s, Blignaut rose as a team leader in the South African Formula 1 Championship. Driver of the " Alex Blignaut Racing Team " were, among others Eddie Keizan and Ian Scheckter. 1973 and 1974, took over the team with Eddie Keizan in a Tyrrell 004 at the Grand Prix of South Africa in part.
On 15 January 2001 Blignaut died on his farm when he died of electrocution while fixing a machine.