William ‘Bill’ E. Schrof has 28 years’ experience working for Shell, Motiva, Invista, and LyondellBasell in the refining and petrochemical business. At Shell, he was initially developed as a Subject Matter Expert (SME) in the design, operation and troubleshooting of fired heat transfer equipment (refinery heaters, crackers, incinerators) and un-fired heat transfer equipment (reboilers, condensers, vacuum systems & cooling water towers). After his development as a SME,