Have any examples of a startup leader taking over a large, mature company and doing well? Seems like the skill sets of driving a race car don't necessarily tran

Have any examples of a startup leader taking over a large, mature company and doing well? Seems like the skill sets of driving a race car don't necessarily transfer well to locomotives. People who thrive at building a startup often are not particularly successful taking over a mature business. Meg Whitman comes to mind, though HP has its own world of hurt.