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OUR SERVICES
Construction
Energy
Mining
Services
COMPANY
OSSA History
Organisational Chart
Mechanical Resources
Economic Data
NEWS
SUSTAINABILITY
Quality
Enviroment
Health & Safety
R & D
CSR
JOBS
CONTACT
OSSA supports the SDGs of the United Nations Global Compact.
14/09/2021
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Last breakthrough in the extension of Line 3 of the Santiago Subway (Chile)
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OSSA distinguished for its commitment to safety (Peru)
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