Looking at U.S. plays in late 2015, Mark Whitley put the northern Delaware Basin at the top of his target list. At the time, southern Delaware activity was heating up; the northern Delaware, not as much yet.

After retiring from Range Resources Corp. in 2012 as senior vice president, a friend of 42 years—both worked at Shell Oil Co. in the 1970s—was working for Warburg Pincus LLC. Whitley joined the board of a Warburg-backed E&P focused on the Montney play in British Columbia. He joined two additional boards, while also advising Warburg in evaluating management teams and assets.

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