[an executive in Tesla's supply chain joins competitor Rivian] Tesla's senior executive in charge of cyber truck supply chain has resigned to join Rivian, a competitor for electric trucks, according to people familiar with the matter. Mustapha El Akkari, the head of the raw materials department responsible for managing Tesla's non-battery supply chain, has joined Rivian as a senior director of the structure and raw materials department, the person familiar with the matter said. (The Information)