Kinder Morgan
CenterPoint Energy
El Paso Corp.
Spectra Energy
Iroquois Gas Transmission
Piedmont Natural Gas
Crosstex Energy
Quicksilver Resources
Plains All-America Pipeline
EPCO Inc.
Chesapeake Energy
SourceGas
Calpine Corporation
Dow Chemical
Dynegy Inc.
Union Gas
Lyondell
Global Geophysical
Laclede Gas
Gainesville Regional Utilities
Carolina Gas Transmission
The Southern Gas Association
The Pipeline & Hazardous Materials Safety Administration
The Interstate Natural Gas Association of America (INGAA)

Former Clients
Vastar Resources
Burlington Resources
Pennzoil/Quaker State
Shell Oil
Midcontinent Express Pipeline
Enron Operations Corp.
Yankee Energy
Illinois Power
Cooper Industries
C2C Fiber
Huntsman Chemical
New York State Electric & Gas
Peoples Gas
Peoples Energy Production
Providence Gas
Entergy
Pioneer Concrete
Occidental Petroleum