The EFA Team biographies

John Zumberge

John E. Zumberge has been vice president and cofounder of GeoMark Research in Houston since 1991. He was manager of geochemical and geological research for Cities Service–Occidental, general manager for Ruska Laboratories, and director of geochemical services for Core Laboratories. He has global experience in petroleum geochemistry, focusing on crude-oil biomarkers. He obtained a BSc in chemistry from the University of Michigan and a Ph.D. in organic geochemistry from the University of Arizona.