References     918-272-3400
Access Midstream Partners

Access Midstream Partners, LP.

Burns & McDonnell Engineering

Burns & McDonnell Engineering Company, Inc.

ConocoPhillips

ConocoPhillips Company

ENGlobal

ENGlobal Corporation
Engineering and Construction Segment

HollyFrontier

HollyFrontier Corporation

Honeywell International

Honeywell International, Inc.
Oil & Gas, Refining, Petrochemicals, & Biofuels

Lauren Engineers & Constructors

Lauren Engineers & Constructors, Inc.

Magellan Midstream Partners

Magellan Midstream Partners, LP.

URS

URS Corporation

Victory Energy Operations

Victory Energy Operations, LLC.

Willbros Group

Willbros Group, Inc.

The Williams Companies

The Williams Companies, Inc.

WorleyParsons

WorleyParsons, Ltd.

Zeeco

Zeeco, Inc.