Jonathan J. Rubinstein is the former senior vice president of hardware engineering at Apple, where he also served as general manager of the iPod Division. He currently serves on the boards of Amazon and Robinhood Markets and previously served on the boards of Qualcomm and Immersion. Rubinstein is a senior advisor at PDT Partners and previously was co-CEO of Bridgewater Associates. He served as chair, president, and CEO of Palm and later joined HP as a senior vice president after its acquisition of the company. Prior to Apple he was at Firepower, NeXT, Stardent, HP, and Computerland of Ithaca.