He founded, co-founded, or was a major investor in companies including Ensco plc, an offshore drilling company, in 1986; Columbia Hospital Corporation in 1988; Mid Ocean Limited, a provider of casualty re-insurance, in 1992; Crescent Real Estate Equities, Inc. in 1994; and Pioneer Natural Resources in 1997. In 2010, he was awarded the Arbuckle Award at Stanford, where he received a MBA in 1968. In accepting the award, he credited his mother with giving him people skills that had an enormous effect on his Business and deal making success.