The rise and fall of energy titan Aubrey McClendon (CHK)

Thomson ReutersFormer CEO, Chairman, and Co-founder of Chesapeake Energy Corporation McClendon walks through the French Quarter in New Orleans, Louisiana

Former Chesapeake Energy CEO Aubrey McClendon has died in a single car accident.

McClendon was the co-founder of Chesapeake Energy and turned it into the country’s second-largest natural gas producer. McClendon was also a key player in the shale boom that has changed the global oil markets over the last decade.

Business Insider took a closer look at the career McClendon built.

Editor’s Note: Former Business Insider writer Rob Wile contributed to an earlier version of this feature.