About Us

About ENSI

Neuquén Engineering Services Company

Over 30 years of engineering services in the energy industry

ENSI is a leading Argentine company in the energy industry, with more than three decades of experience in the operation, maintenance, and management of industrial assets.

It was established in 1991 with the objective of completing the construction, assembly, and commissioning of the Heavy Water Industrial Plant (PIAP), as well as carrying out its operation and maintenance.

As part of the nuclear energy value chain, ENSI has developed and maintained—over time—high-level capabilities based on international standards of technical excellence.

Building on these capabilities, in 1995, ENSI added an Oil & Gas unit, providing operation, maintenance, and asset management services for industrial plants and oil/gas fields. The company has spent 30 years operating in the Neuquén Basin, Chubut, Santa Cruz, and Tierra del Fuego.

History of ENSI

1991

Creation of ENSI

Neuquén Engineering Services Company is founded for the assembly, operation, and maintenance of the Heavy Water Industrial Plant (PIAP).

1994

PIAP Historic Milestone

Production of virgin, reactor-grade heavy water with 99.85% isotopic purity is achieved, marking a historic technical milestone for the PIAP and ENSI.

1995

New O&M Services Unit

A new business unit is established, focused on providing O&M (Operations & Maintenance) services to support operators in the oil and gas sector in Argentine Patagonia.

2015

ISO 9001 and 14001 Certification

Receipt of ISO 9001 (Quality Management) and ISO 14001 (Environmental Management) certifications, awarded by SGS, reaffirming a commitment to continuous improvement and sustainability across all operations.

2018

ISO 45001 Certification

Receipt of ISO 45001 (Occupational Health and Safety Management) certification, awarded by SGS, reaffirming ENSI’s commitment to protecting its employees, preventing workplace risks, and promoting a safe and sustainable work environment.

2020

Consolidation of O&M Services

ENSI consolidates its Operations & Maintenance (O&M) service, expanding its operations nationwide and strengthening its presence in strategic projects within the Argentine energy industry.

2026

ENSI obtiene verificación ISO 14064

ENSI has obtained verification of its greenhouse gas (GHG) inventory in accordance with the international standard ISO 14064, reaffirming its commitment to environmental management, transparency, and the sustainability of its operations.

Experience and Track Record in O&M and Industrial Asset Management

Since 1995, the company has structured its activities into two complementary business units:

The operation and maintenance of the Heavy Water Industrial Plant (PIAP), and operation and maintenance (O&M) services for the oil and gas sector, provided to operators active in the Argentine Patagonia.

Both units are guided by a shared mission statement: “To provide comprehensive services to the energy industry through asset management, based on the competence of our personnel, corporate social responsibility, our commitment to environmental protection, personnel safety, and energy efficiency.”

Commitment to Excellence

ISO Certifications and International Management Standards

ENSI has built solid expertise in industrial operation and maintenance, underpinned by Asset Management (ISO 55000), Process Safety Management (PSM), and Energy Efficiency (ISO 50001).

This management approach is supported by international standards—ISO 9001 (Quality Management), ISO 14001 (Environmental Management), ISO 45001 (Occupational Health and Safety), and ISO 50001 (Energy Efficiency)—as well as ISO 14064 verification (Carbon Footprint), all of which ensure the quality, safety, and sustainability of our processes.

SGS Certificates: ISO9001 – ISO14001 – ISO45001 – ISO 14064-3:2019 Validation

The DNA of Our Service Offering

Integrated Quality, Safety, and Environmental Policies

ENSI is committed to providing comprehensive services to the energy industry, centered on the safety of people and processes, the health of our workforce, and the quality of our operations.

The company promotes environmental protection and energy efficiency, upholds a strong commitment to corporate social responsibility, and enhances the capabilities and professionalism of its staff through continuous training and development. These values form the foundation of a management approach focused on sustainability, innovation, and technological development.

Operating in Vaca Muerta and Argentina’s major oil basins

With a strong presence in the Vaca Muerta region, ENSI continues to innovate and adapt to the needs of the energy and oil sector, providing industrial operation and maintenance services to operators across the country that require specialized support.