The inaugural Formula E champion, who finished second in the 2008 German Grand Prix for Renault, will join the prolific Anglo-American United squad co-owned by Zak Brown and Richard Dean to partner Andy Meyrick and Daniel Schneider in the LMP2 Pro-Am class.
It will be a first European programme for Piquet, the 2004 British Formula 3 champion, since his exit from the Jaguar FE team midway through the 2017-18 campaign.
