Simplify the following text for a Grade 8 native English-speaking person.
Original: Following the demise of the team , he joined Bernie Ecclestone 's Brabham team at Weybridge , where he would stay for the following decade , becoming chief mechanic for the World Drivers ' Championship successes of Nelson Piquet in and and later rising to chief engineer , while Nick went on to open a Motor Racing spares shop near the Brands Hatch circuit .
Simplified: When the team folded , he joined Bernie Ecclestone 's Brabham team . He become the chief mechanic for Nelson Piquet in and seasons .