Dr. Anthony Sofronas is the former Worldwide Lead Mechanical Engineer for ExxonMobil. He was involved with machinery troubleshooting for 50 years with over 130 publications and presented over 30 industry seminars worldwide on machinery troubleshooting. Sofronas served as owner of Engineered Products (engineering consulting and seminars) for 16 years. He was Contributing Editor for Hydrocarbon Processing Magazine for 16 years on machinery and pressure vessel troubleshooting (110 articles). He has written multiple books published by Wiley.