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Legend
Executive · Operator
Maryann Mannen knows what a number leaves out
An accounting graduate spent decades learning the machinery behind the balance sheet. Now Maryann Mannen leads Marathon Petroleum, where a good number still has to work in the real world.
maryann-mannen · marathon-petroleumRead →
Executive · Operator · Engineer
Michael Hennigan and the second life of a refinery
He started at Marcus Hook in 1981. Three decades later, Michael Hennigan helped give the old refinery a new purpose - a preview of the decisions that would define his years leading Marathon Petroleum.
michael-hennigan · michael-j-henniganRead →