ABEC, Inc.

Agrium Inc.

Arizona Chemical Company

Bahrain Petroleum Company - BAPCO

BHPBilliton Nickel West

Braskem, PP Americas, Inc.

Cenovus Energy Inc.

Chevron Phillips Chemical Company, LP

Coffeyville Resources Refining & Marketing LLC

Engineering for the Petroleum & Process Industries (ENPPI)

Harvest Operations Corp.

Indorama Ventures PCI

Jotun Paints Inc.

Koch Industries Inc

KPS Technology & Engineering LLC

Kraton Polymers

Lloyd Engineering, Inc.

Lyondell Chemical Company

Marafiq

Methanex Corp.

North West Redwater Partnership

NuStar Logistics, L.P.

ONEOK, Inc.

Petroleum Company of Trinidad and Tobago Ltd.

PlusPetrol S.A.

Praxair

Rockwood Lithium Inc.

Roquette America Inc.

Sasol Technology

Seadrift Coke L.P.

Silver Eagle Refining

Sinclair Oil Corporation

Stepan Company

Sumitomo Chemical Company, Ltd.

The Sherwin-Williams Company

Tengizchevroil (TCO)

The University of Texas at Austin Department of Utilities and Energy Management

Valero Corporate Services Company

The Williams Companies

Willbros Engineers, LLC

Wood Group Mustang

Woodson Engineering LLC