World-Class Marine Engineering and Subsea Construction

More than 66 years developing underwater infrastructure,
offshore operations and marine engineering solutions for mining, energy, and desalination.

SWIPE

YEARS OF EXPERIENCE

+2.5M

Man-hours without fatalities

ADCI

INTERNATIONAL CERTIFICATION

300 m

MAXIMUM OPERATING DEPTH

Leading Subsea engineering in Chile since 1960

STS is Chile's largest and most experienced private marine engineering and construction company, and a benchmark in Latin America. Founded in 1960, it delivers underwater solutions under the highest standards of safety, quality, and technology.

More than six decades of experience support us in high-complexity projects for mining, energy, port infrastructure, and desalination, with Industrial Commercial Saturation Diving capabilities up to 300 meters deep.

Our History

Hitos que construyeron a STS

Over six decades of marine engineering and construction. Every milestone, a project executed beneath the sea.

1960
STS Foundation

STS Marine engineering and construction
1978
Ventanas Pier Fenders

Construction of fenders for the Ventanas pier.
1979
ENAP Antofagasta Underwater Pipeline

Installation of a new subsea pipeline, ENAP Antofagasta.
1987
Oil Pipeline to the Caldera Plant

New pipeline for the Caldera plant.
1989
Pier 4, Iquique Naval Zone I

Mango III Project: Pier construction, 4th Naval Zone Iquique.
1991
Vinapu Subsea Pipeline

New Undersea Pipeline, Vinapu Oil Terminal, Easter Island.
1992
Las Cruces seawater intake

Seawater intake for Las Cruces Marine Culture Industry.
1993
Argentine Atlantic Platforms

Underwater construction and services for offshore oil platforms in the Argentine Atlantic.
1998
Playa Brava and Punta Negra Outfalls

Upgrades to the Playa Brava and Punta Negra Submarine Outfalls, Iquique, Region I.
2000
Argentine Atlantic Platforms

Underwater construction and services for offshore oil platforms in the Argentine Atlantic.
2000
SAC Chile fiber optic cable

Launch and installation of the SAC Chile submarine fiber-optic cable.
2001
North Pier, Quiriquina Island

Construction of the North Pier, Quiriquina Island.
2004
Achao and Chaitén Outfalls

Construction of wastewater treatment plants and outfall pipes for Achao and Chaitén.
2004
Coloso Marine Structures

Marine structural engineering in Coloso.
2005
Escondida Pilot Desalination Plant

Marine works, intake and outfall pipelines, pilot desalination plant — Minera Escondida.
2005
Lenga Subsea outfall

Construction of the Lenga submarine outfall.
2008
Coloso Desalination Plant

Marine works engineering, new desalination plant, Coloso, Minera Escondida.
2008
Ventanas Units 1 and 2 Siphon Pre-filter

Design, engineering, construction, monitoring, and maintenance of the suction siphon pre-filter, Ventanas 1 and 2 Thermal Power Plant.
2009
Rescue of the M/V Polar Mist

High-depth recovery of gold cargo, M/V Polar Mist.
2012
EWS — Geotechnical studies

Escondida Water Supply: marine geotechnical studies for intake and outfall tunnels.
2013
Guacolda U5 Central Siphon

Guacolda U5 Project: seawater intake siphon for cooling, Guacolda Thermal Power Plant, Huasco.
2015
EWS Desalination Plant Subsea Works

Construction of underwater works, Escondida Water Supply (EWS) desalination plant.
2018
Overhaul Shiploader Coloso

Shiploader Overhaul Project, Coloso Port, Minera Escondida Limitada.
2019
Quebrada Blanca Phase 2

Quebrada Blanca Phase 2 — Marine Works, SKComsa.
2021
INCO Project — Los Pelambres

Marine works, HDPE piping, and seawater intake and outfall tunnels, Belfi-Eurohinca Consortium for Minera Los Pelambres.
2023
Escondida Bubble-Curtain Pre-filter

Marine construction, BUBBLES pre-filter system, desalination plant intake for Minera Escondida Limitada.
2023
ROV Service ENAP Magallanes

ROV Service Contract, ENAP Magallanes.
2025
Quintero Terminal Maintenance

Maintenance service, Quintero Marine terminal, ENAP Refinerías.
2026
Centinela Intake Hood

Expansion of the PV4-d seawater intake hood, Centinela Pier, NCEN Project.

Construyendo bajo el mar. Desde 1960. Milestones of 29 · STS Marine Engineering and Construction

Specialized Services

Comprehensive submarine engineering and construction solutions for the mining, energy, and industrial sectors.

Marine Engineering

Complete cycle of marine and subsea engineering, from conceptual to detailed design, incorporating international regulatory criteria and knowledge of the Chilean marine environment.

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Subsea construction

Execution of high-complexity seabed construction works with its own major fleet and Industrial Commercial Divers, under the Zero Harm safety standard.

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Offshore Services

Autonomous offshore system on own vessels, with 24/7 continuous operation for over 60 days, LARS, ROV, and Nitrox, Trimix, and Heliox gas plants.

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Inspection and Maintenance

Accurate, documented inspections with cutting-edge technology, and maintenance of critical structures that extends the lifespan of subsea assets.

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Projects that Transform Infrastructure

Engineering solutions applied to the country's biggest operational challenges.

2025–2026

Minera Centinela (NCEN)

Expansion and reinforcement of the seawater intake bell (PV4-d) of the Centinela Pier, in operation and without interrupting the supply.

See success story →

contract valid from June 2024

ENAP Quintero

Comprehensive maintenance of the Quintero Maritime Terminal under a contract in force since June 2024.

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2021–2024

INCO – Los Pelambres

Marine intake and outfall works for the Los Pelambres desalination plant, featuring HDPE pipelines and large-diameter tunnels.

See success story →

International Standard Offshore Technology

We continuously invest in the renewal of our fleet and technical equipment to ensure safe operations in the most demanding environments.

ROV Units
LARS SYSTEMS
DIVING BELLS (SATURATION)
HYPERBARIC CHAMBERS
SPECIALIZED VESSELS
NITROX PLANTS

Technical Expertise That Reduces Risks

LRQA Certified ISO 9001, ISO 14001, ISO 45001

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More than six decades of experience developing subsea infrastructure, offshore operations, and marine engineering solutions for mining, energy, and desalination in Chile and Latin America.

info@sts-chile.cl

World-Class Marine Engineering and Subsea Construction

Leading Subsea engineering in Chile since 1960

Specialized Services

Marine Engineering

Subsea construction

Offshore Services

Inspection and Maintenance

Projects that Transform Infrastructure

Minera Centinela (NCEN)

ENAP Quintero

INCO – Los Pelambres

International Standard Offshore Technology

Technical Expertise That Reduces Risks

Stay up to date on our latest naval engineering projects, technological innovations, and news from the global maritime industry.

Get in touch with us and let's talk.

We build infrastructure.We Build Careers, Too.

We build infrastructure.
We Build Careers, Too.