Abitibi
AF Sterling Homes
Alamos Gold Inc.
American Tower
Arizona Aerospace
Arizona Department of Transportation
Arizona Portland Cement
Arizona Public Service
Arizona State University
ASARCO
Association of Universities for Research in Astronomy
Augusta Resource
Barrick Goldstrike
Battle Mountain Gold
BHP Copper
Boeing Corp.
Bombardier/Learjet
Buenaventura
Caid Industries
California Institute of Technology
Canyon Water District
Capital Gold Corp.
Carnegie Observatories
CEMEX
Cemrock Corp.
Chemical Lime Co.
Chemstar
City of Tucson
Cobre del Mayo
Cornell University
CTI, Inc.
Diversified Design & Construction
Farallon Resources Ltd.
Freeport McMoRan Inc
Frontera Copper Corp.
General Moly Inc.
Glamis Gold Ltd.
Global Alumina Corp.
Goldcorp Inc.
Golden Queen Mining Co. Ltd.
Granite Construction
Greenlee County
Greenstone Mining
Grupo México
Hecla Mining Co.
Hexcel Corp.
Honeywell International
Idaho General Mines
Industrias Peñoles
Kennecott Utah Copper
Kerr-McGee Corp.
Kinross Gold Corp.
KT Clay Company
Large Binocular Telescope Corp.
Lincoln Lab/MIT
Lowell Observatory
Luismin
Magdalena Ridge Observatory
Maricopa County Mine
National Radio Astronomy Observatory
New Mexico Tech University
Newmont Mining Corp
Nextel
Northisle Copper and Gold Inc.
Pan American Silver Corp.
Perpetua Resources Corp. (Previously Midas Gold)
Phelps Dodge Corp.
Pima Community College
Pima County
Pimalco Inc.
Pinal Creek Group
Quadra Mining
Raytheon Company
Resolution Copper Company
Rosemont Copper Co.
Sanmina – SCI
SH&G Southwest
Smithsonian Institution
Southern Peru Copper Company
Spectra Physics Lasers Inc.
Sprint State of Arizona Steward Observatory
Stibnite
T.L. Roof Construction Co.
Teck Cominco
Tetra Tech
The University of Arizona
Thirty Meter Telescope Corp.
T-Mobile
Torex Gold Resources
Tucson Airport Authority
Tucson Unified School District
Western Copper and Gold Corp.
Yamana Gold Inc.
Zaruma Resources