Earlier this year, big-time executive search firm Spencer Stuart reported that the average tenure of a chief marketing officer dropped to just 42 months, marking a rapid two-year decline of 13%. Oof! Forty-two months. That’s not much longer than your average car lease. A hair shorter than a one-term President. And probably a bit less time than any C-level exec would like to come into a new job, assess and reshape an organization, plan and execute a strategy and deliver expected results.