Many years ago Chris Espinosa (Apple Employee #8) gave a talk at MacHack about how to stay in a job at Apple for so long. (This would have been around 2000 and

Many years ago Chris Espinosa (Apple Employee #8) gave a talk at MacHack about how to stay in a job at Apple for so long. (This would have been around 2000 and he had been there since the 70s.) His conclusion was that you should be obscure but irreplaceable. That is do something that nobody else understands, but that is necessary to keep things running. Seems to have worked for him!