Donald A. Herron received a B.Sc. (geological sciences with honors) from Brown University in 1971 and an M.S. (geological sciences) from the California Institute of Technology in 1973. He worked as a seismic interpreter for Texaco from 1973-77, Gulf from 1977-84, and most recently Sohio/BP from 1984-2008. Since retirement in 2008 he has worked as an independent geophysical consultant for Petroleum Geo-Services (PGS) as a geoscience advisor and also with several oil and service companies as a seismic interpretation instructor. He was a member of the Editorial Board ofThe Leading Edge from 2002–07 (chairman in 2006–07), is currently an Associate Editor for the joint SEG-AAPG journal Interpretation, and is author of the bi-monthly “Interpreter Sam” column in The Leading Edge. He is author of SEG Geophysical Monograph Series #15, The Misadventures of Interpreter Sam, and #16, First Steps in Seismic Interpretation. He is an active member of SEG, AAPG and Sigma Xi.