| |
| Aalborg Industries |
| American Eagle Outfitters |
| Auto-Matrix, Inc. |
| Babcock & Wilcox |
| Bechtel-Bettis, Inc |
| Bell Atlantic |
| Bethlehem Steel |
| Black Box Corporation |
| Burt Hill Kosar Rittelmann |
| Carrier Transicold |
| Copeland Corporation |
| Crane Pro Services |
| Duquesne Light |
| 84 Lumber Company |
| Elliott Company |
| FMC Corporation |
| General Nutrition Centers |
| Home Depot |
International Brotherhood of
Electrical Workers |
| Jendoco Construction |
| Kaiser Engineers |
| Kennametal, Inc. |
| Kvaerner Oil |
| L. D. Astorino Associates |
| Limbach Company |
|
|
| Lord Corporation |
| Lowe's Home Improvement |
| Marriott |
| Mellon Bank |
| Miller Welding |
| Mitsubishi Power |
| Newport News Shipbuilding Company |
| Parsons Brinckerhoff, Inc. |
| Pelly Custom Homes |
| PennDot |
| Pittsburgh DesMoines Company |
| PNC Bank |
| R. G. Behers Electrical Service |
| Rockwell |
| SE Technologies |
TRACO
|
Trail King Industries
|
| Trane |
United Brotherhood of Carpenters
and Joiners of America |
| US Airways |
| U.S. Corp of Engineers |
| Weber Murphy Fox Architects |
| Welch's Foods |
| W. N. Tuscano Agency |
| Zurn Industries |
|
| |
| Aalborg Industries |
| ABB Company |
| Abbott Furnace Company |
| Agway Energy Products |
| Allegheny Boiler Tube |
| Allegheny High Lift, Inc. |
| Allegheny Powder Metallurgy |
| Alstom U.S.A., Inc. |
| American Eagle Outfitters |
| Auto-Matrix, Inc. |
| Babcock & Wilcox |
| Bechtel-Bettis, Inc. |
| Bell Atlantic |
| Bethlehem Steel |
| BJ Baldwin Electric |
| Black Box Corporation |
| Brookville Mining |
| Bryant Durham Electric |
| Brysco Foods Service |
| Burt Hill Kosar Rittelmann |
| Capco Contracting |
| Carrier Transicold |
| Caylor Electric |
| Channellock Incorporated |
| City of Erie |
| CMS East |
| Community Home Health |
| Copeland Corporation |
| Crane Pro Services |
| Crum Electric |
| Dresser-Rand |
| Dual Refrigeration |
| Ductmate |
| Duquesne Light |
| 84 Lumber Company |
| Elizabeth-Hata International |
| Elliott Company |
| Erie Forge Company |
| Fay-West Chiropractic |
| FMC Corporation |
| Gasbarre Products |
| General Nutrition Centers |
| Guardian Industries |
| Habiterra |
| Herbert Rowland & Grubic |
| H. F. Lenz Corporation |
| Home Depot |
| Howard McClain Construction |
| International Brotherhood of Electrical Workers
|
| Interstates Electric |
| James Construction |
| Janus Inc. |
| Jendoco Construction |
| Jewell Electric |
| Johnson Controls |
| Johnson's Heating & Supplies |
| Kaiser Engineers |
| |
|
|
| Kaiser Engineers |
| Kennametal, Inc. |
| Kimley |
| Horn & Associates, Inc. |
| KTH Architects |
| Kvaerner Oil |
| Lancaster Electric |
| L. D. Astorino Associates |
| L. Robert Kimball & Associates |
| Limbach Company |
| Leybold Vacuum Products |
| Logical Automation |
| Loranger International Corporation |
| Lord Corporation |
| Lowe's Home Improvement |
| Marriott |
| Mellon Bank |
| Metro Metals |
| Miller Welding |
| Mitsubishi Power |
| Modern Industries |
| Mullen Refrigeration Company |
| Newport News Shipbuilding Company |
| Northwest Savings Bank |
| Ogden Manufacturing |
| Parsons Brinckerhoff, Inc. |
| Pelly Custom Homes |
| PennDot |
| Pennsylvania Transformer Technology, Inc. |
| Physicians Plus |
| Pittsburgh DesMoines Company |
| Pittsburgh Engineering Consultants |
| PNC Bank |
| Restorall Inc. |
| R. G. Behers Electrical Service |
| Robicon Corporation |
| Rockwell |
| Roth Marz Architects |
| Saegertown Manufacturing |
| SE Technologies |
| State College Electric |
| Steris Corporation |
| Structural Modulars |
| Swiss Construction |
| TBS Architects |
| TRACO |
| Trail King Industries |
| Trane -Transtar, Inc. |
| Tudi Mechanical Systems |
| United Brotherhood of Carpenters and Joiners of
AmericaAgency |
| US Airways |
| U. S. Corp of Engineers |
| U. S. Steel Group |
| Weber Murphy Fox Architects |
| Welch's Foods |
| W. N. Tuscano |
| Zurn Industries |
|