Education
  • University of Texas at Austin, McCombs School of Business
    M.B.A. (2009)
  • Texas A&M University
    B.S. Chemical Engineering (1995)
Areas of expertise
  • Asset Valuations
  • Technology Assessment
  • Project Feasibility
  • Standard of Care
  • PRISM Refining Industry Modeling and Database
  • Renewables and Regulatory
  • Independent Engineer / Mergers & Acquisitions
  • Markets & Strategy
  • Insurance Claims
  • Quantum/Damages Assessment
  • Physical Asset Appraisal
  • Technology Assessment
  • Project Feasibility
  • LP Planning / Practice
  • Water/Marine
  • Operations and Maintenance
  • Product Quality
  • Pricing
  • Crude Oil Valuation
  • Toxic Tort
Industries
  • Chemicals and Petrochemicals
  • Power Generation
  • Petroleum Refining
  • Transportation and Storage
  • Renewable Fuels
Certifications

LETAPAEWE

Summary of Experience

With a robust 30-year career in the petroleum industry, Mr. Devenish is a seasoned professional in petroleum refining and petrochemical/chemical production. His diverse background spans process engineering design, research and development, field services, technical service, commissioning, operations management, planning, and economics. Gary's expertise covers a broad spectrum of key refining and petrochemical processes.

Gary has managed commissioning, operations, logistics, and economics teams and departments for the two largest U.S. refiners. His economics and planning experience includes auditing, developing, and applying refinery Linear Program (LP) models. He was Operations Manager for a multi-billion dollar operating complex that included utility steam generation, wastewater treatment, hydrogen production, and high-severity hydrotreating and hydrocracking units.

In his advisory consulting work, Gary conducts market analyses, strategic planning, and technology due diligence. He has acted as an Independent Engineer for investors involved in a multi-billion dollar grass-roots refining and petrochemical facility. His expert witness work covers areas such as commissioning, operations, and lost opportunity assessments for refineries, petrochemical facilities, and power plants, equipment design and performance reviews, and major EPC project engineering issues. Gary has successfully testified in depositions and international arbitrations.

Previous Experience

2005-2015: Valero Energy Corporation,
Complex Operations Manager
Manager, Refinery Optimization and Planning
Regional Optimization Manager
Staff Planning and Scheduling Engineer
Engineering Group - Group Leader, Staff Process Engineer

2002-2005: Marathon Petroleum Company,
Operations Superintendent
Engineer III, Crude and Sat Gas Units

1996-2002: UOP, LLC,
Chief Technical Advisor
Technical Advisor
Development Engineer