- Western Pacific Mining (Domeyko)
- Placer Dome (Cerro Casale-Maricunga)
- Minera Broken Hill Proprietary .
- Works performed included road and high altitude platform construction and trenching at the following projects:
- La Fortuna Project (Vallenar ,1990)
- Project Geotem No.1060 (Sierra Gorda, 1990)
- Project Polo Sur (Sierra Gorda, 1990)
- Project Caracoles No. 1061 (Sierra Gorda, 1990)
- Project Angelica (1993)
- Project Pulido (1993)
- Project Caimanes (1994)
- Project Merceditas (1995)
- Project Iman-Vallenar (1995)
- Project 6033 (Obispo, 1996)
- Project 6031 (Mondaca ,1997).
- Minera Rea Gold (Copiapo, 1995).
- Minera Santa Fe Pacific Chile Ltda (Copiapo 1994-95)
- Minera Cominco Resources Chile Ltda. (Ovalle, 1992).
- Placer Dome Latin America.(January 1997).
- Bema Gold (Compañia Minera Estrella de Oro) (Copiapo, 1992)
- Bema Gold/Amax Gold (Sociedad Contractual Minera Maricunga) (June-August 1997).
- Phelps Dodge (Compañia Minera Ojos del Salado) (Copiapo,1989)
- Phelps Dodge (Compañia Minera Contractual Minera Candelaria) (Candelaria, 1995)
- Minera Mount I.S.A. Chile S.A. (1994)
- Minera Dayton Chile (1996)
- Compañia Minera Newmont de Chile (1993)
- Compañia Minera Metallica Ltda (1995)
- Minera Rio Tinto
- Exploraciones BARRICK
- Minera CIELO AZUL
- FORTUNE VALLEY
- Minera COTOTE
- Minera MANDELEY
- Xtrata COPPER