Talk about a brief retirement. In March the 29-year Chevron veteran stepped down from running the $194 billion company's downstream division. By May she had stepped into the corner office at the $37 billion agribusiness giant. Woertz's energy expertise is expected to guide ADM's push in renewable fuels (see story, page 166). Her timing was impeccable: Riding a commodities boom, ADM stock has had a good run.