About Us
Established in 1993 as the first company of MCS Group
MCS International LLC has grown into a leading national engineering company. With a strong focus on modern technologies and integrated solutions, we have actively contributed to the transformation of the mining and energy sectors, driving progress and innovation for Mongolia’s development.
Mission
Introducing World Engineering standards to Mongolia
Vision
We will deliver effective outcomes of optimal engineering solutions, project management, operations and maintenance, and innovation to our clients.
Values
Creativity
MCS Ship
Integrity
Team spirit
Sustainability
Mastery
Leadership
Creativity
We continuously generate creative ideas, initiatives, and solutions to improve, develop, and solve challenges.
1993 - 2004
Our Foundations
1993
MCS International LLC was established and started its operations by providing consulting services in the energy sector
1997
Energy Division of MCS International LLC was formed
2003
Energy Technology center was established to introduce and market new technologies and equipment
2004
Erchim suljee LLC was established as an electricity supplier and distributer
2006 - 2015
Commissioned and Started
2006 - 2007
Successfully completed the electrical distribution and mechanical installation project at the Oyu Tolgoi mine workers’ camp
2007
Successfully implemented the Taishir–Zavkhan River Hydropower Plant, the largest hydropower facility in Mongolia
2011
MCS International LLC Umnugobi branch was established to provide power supply services to UHG mine and Tsogttsetsii soum areas
2011
UHG 18 MW Power Plant was commissioned and started its operations
2013
MCS International LLC and FLOUR Companies joint venture, MNFS was established
2015
Successfully implemented projects on the HHB-110 system upgrade and turbine upgrade design review for the Darkhan Thermal Power Plant
2016 - 2025
Successfully Implemented
2016
Commenced engagement as a contractor in the Oyu Tolgoi Underground Mine Development Project, contributing to the most significant mining project in Mongolia
2016 - 2017
Successfully implemented the 50 MW Tsetsii Wind Farm project
2016 - 2018
Successfully participated as a general and subcontractor in major renewable energy projects in Mongolia
2019
Successfully completed the 58 MW expansion project of the Oyu Tolgoi Central Heating Plant and implemented an Integrated Management System
2019
Agar Energy LLC was established in 2019 as a subsidiary of MCS International LLC
2019
Successfully implemented the Integrated Management System
2020-2021
Implemented major projects under the Oyu Tolgoi Underground Mine Development
2021
Successfully completed Mongolia’s first 5 MW Uliastai Solar Power Plant project equipped with a BESS system
2022
Successfully implemented the 10 MW Altai Solar Power Plant Project
2024
Successfully completed the Central Repair Workshop, Wash Bay, and Ventilation Fan Installation projects at the Oyu Tolgoi Underground Mine
2024
Established the Gold Mine Power Supply operation department
2025
Successfully implemented the Nariin Sukhait
Capabilities
Project Management
Operation and Maintenance service
Engineering
Consultancy 
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