S.P. Johnson IV has been President and Chief Executive Officer of Carrizo Oil & Gas Inc. since founding it in 1993. Previously, he worked for 15 years at Shell Oil in different E&P engineering roles. He has a B.S. in mechanical engineering from the University of Colorado. Mr. Johnson is on the board of Basic Energy Services, Inc., and was a board member of Pinnacle Gas Resources, Inc., until 2011. Carrizo Oil & Gas went public in 1997 and started drilling in the Barnett shale in 2003. Since then, the company has built sizable acreage positions in the Fayetteville, Marcellus, Eagle Ford and Niobrara shale plays. Carrizo and Avista Capital Partners are building an acreage position in the Utica shale.
