Revised exit strategy

Knowing when and how to leave are two of life's great, underrated skills.

They have also happened to be two of Dick Syron's professional strengths. He accomplished important goals and then left on top at a series of big jobs, running the Federal Reserve Bank of Boston, the American Stock Exchange, and Thermo Electron Corp. (now called Thermo Fisher Scientific Inc.) in Waltham. That didn't happen by accident.