2016-Present: University of Houston, Adjunct Professor of Ph.D. and undergraduate classes.
2010-2015: Occidental Oil and Gas Corporation (OXY), Senior Consultant Reservoir Engineer. Field and Pilot Studies of Miscible, Thermal and Chemical EOR Methods.
2007-2009: BP, Senior Reservoir Engineer, Emerging and EOR Technologies.
2003-2006: BP America, Senior Reservoir Engineer, Exploration and Production Technology. Field Appraisal and Development.
2000-2002: BP, Senior Reservoir Engineer, BP Trinidad Business Unit. Field Development.
1998-1999: BP Amoco, Reservoir Engineer, Global Petrotechnical Applications. Evaluation and application of reservoir engineering software.
1997-1998: Amoco Production Company, Reservoir Engineer, Field Development Studies.
1991-1997: University of Tulsa, Adjunct Professor, graduate and undergraduate classes.
1986-1997: Amoco Research Center, Research Reservoir Engineer, Simulator Development Research, Field Studies, CO2 EOR, Horizontal Fractured Wells.
1985: Stanford University, Post-Doctoral Affiliate, Petroleum Engineering Department. Research.
1984: Pemex, Part-time Contract Reservoir Simulation Engineer, Field Studies.
1983-1985: National Polytechnic Institute (Mexico), Part-time Instructor, undergraduate classes.
1982-1983: Mexican Petroleum Institute, Reservoir Engineer, rock and fluid properties.
1980-1981: Stanford University, Ph.D. Student-Teacher, undergraduate classes.