Aberdeen Army Research Lab

ALCOA Aluminum

Alcosan Waste Treatment

Allegheny County Corrections

Allegheny County Housing Authority

Allegheny Health Network (AHN)

ATI/ Allegheny Ludlum

Allenwood Federal Prison System

American Electric Power

Atlanta Olympic Stadium

Barton Mallow Energy

Bayer Corporation

BNY Mellon

Burroughs Wellcome Pharmaceutical

Byrne/ Green Federal Complex

Carlisle Roofing

Carnegie Mellon University

Chicago Bridge and Iron

Children's Hospital of Philadelphia (CHOP)

City of Pittsburgh

Cleveland Electric

Constellation Energy

US Department of Energy

Dominion Electric

Dupont Merck

Duquesne University

Electronic Data Systems (EDS)

Entergy

Excelon

Excelon/Public Service Electric and Gas Company

FBI Identification Center

Federal Corrections Systems

First Energy

Frito Lay

Franciscan University

FT Indiantown Gap Army Facility

Georgia Power

Glaxo Pharmaceutical

Gulf Oil

H.J. Heinz

Harley Davidson

Harrisburg Airport Authority

Harrisburg Housing Authority

Highwoods Properties

Highmark

Keora Power/ Ulchin Nuclear

Korea Electric Power Corporation

Lady Luck Casino

Luminant Energy

Luminant

Magee Womens Hospital

Marriott Hotels

Markwest Energy

May Company

Martins Pastries

MOX Services

Nestles Purina