Andrew Sloley is a principal consultant for Advisian (WorleyParsons Group). His responsibilities include training, process consulting, design, and design supervision. Previously he worked for VECO, which was taken over by CH2M Hill, and, before that, as an independent consultant on process design and distillation operations, and in engineering design support. Previously, he worked as a troubleshooter and consultant for Glitsch, Inc. and as a process engineer in technology development and application for Exxon Chemicals. His experience covers a wide range of petroleum refining and petrochemical areas. He has authored or co-authored over 150 publications and conference papers. Sloley has a bachelor's degree in chemical engineering from the University of Tulsa, and is a registered professional engineer in the State of Texas. He resides in Bellingham, Wash.