Before returning to school, Petropoulos worked in the consulting industry, where one of his projects was improving the businesses of the thousands of independent owners of Ace Hardware stores across the country.

FORBES: Three Questions You Must Answer Before Leaving B-School

Regular readers of this blog will remember Petropoulos as one of 51 Climate Corp Fellows who trained with the Environmental Defense Fund (EDF) last summer and interned with host companies to work on energy efficiency solutions.

FORBES: Three Questions You Must Answer Before Leaving B-School