Olá colegas,

O que significam estes termos shrewd businessmen and individual rig no trecho abaixo?

It's important to remember, however, that titans of industry aren't democratically elected representatives, but shrewd businessmen that have ascended through the ranks of corporate influence for one reason: They are good at making money, and lots of it. Tony Hayward presides at the head of a multinational energy corporation. His job is not to know the minute goings-on of an individual rig; his job is to manage and delegate as needed to keep his company competitive and profitable.

Muito obrigada pela ajuda.