Senior Engineer Design Mechanical Piping (IA)

Oyu Tolgoi’s workforce today is more than 97 per cent Mongolian, and a major strategic focus for the company is to develop a skilled workforce that is continuously learning. We aim to attract the best talent, so that we can together deliver a safe and globally competitive copper business that contributes to the prosperity of Mongolia. 

Oyu Tolgoi LLC is operating a copper-gold mine in southern territory of Mongolia. The company aspires a vision ‘Natural wealth to enduring value, knowledge, and skill’, and pursues a mission, 'Together deliver a safe and globally competitive copper business that contributes to the prosperity of Mongolia' to build one of the largest copper-gold mines worldwide.
 

Senior Mechanical Piping Engineer – Underground Project Management

• Excellent opportunity to be part of a world-class underground mining project
• Great exposure and development opportunities within the Owner’s team
• Collaborative and high performing environment at an exciting location
• International FIFO 4/2 Roster in Mongolia

About your role

We are looking for a Senior Mechanical Piping Engineer to join our project team delivering the world-class Oyu Tolgoi underground mine in Mongolia. This is a key role within the UG Project Management team with the responsibility for the safe and timely delivery of the cave Production Infrastructure.

The Senior Mechanical Piping Engineer is accountable for providing technical expertise to the Underground engineering project team through the development of engineering detailed design.

Working within the OT Underground Project Management team, (mining and construction disciplines) you will:

• Ensure compliance to the OT HSE and Quality Management Plans
• Show outstanding leadership and commitment to HSE and Quality
• Liaise with the project controls personnel to provide accurate updates of progress
• Review and manage performance of external engineering providers
• Provide continuous guidance to engineering team members.
• Develop, oversee, review, and deliver mechanical and piping engineering designs, 3D models, drawings, data sheets, project related specifications and other design documentation as required and in accordance with Mongolian, ISO and OT Site Standards
• Produce engineering Basis of Design, engineering mechanical calculations, pipinganalysis, and preliminary and detailed design drawings and documentation.
• Work with the CSA and Mechanical CAD designers, assisting with development, planning and coordination of engineering designs entailing technical specifications and detailed planning to meet project and client requirements

About you

To be successfully considered for this role, you will have the following:

• Degree qualified mechanical piping engineer with at least 10 years of experience
• At least 8 years of experience in the design and execution of mining and industrial construction projects with delivery of piping, pumping, mine dewatering infrastructure, including process water and compressed air to the project’s quality and performance requirements.
• Relevant Professional/Chattered Engineering registration with engineering bodies/councils
• A detailed understanding of engineering design deliverables including mechanical drawings, piping drawings, equipment datasheets, specifications, MTOs, piping and pumping flow calculations, scope of works for packages and construction.
• Experienced in pre-commissioning, energization, and testing.
• Experienced in dealing with packages related to mine piping, pumping and dewatering equipment.
• Outstanding commitment to HSE and Quality
• A demonstrated ability to work as part of an integrated delivery team.
• Well-developed contract management skills and commercial acumen.
• An ability to work autonomously within a highly complex project delivery environment
• Experience working in developing countries with exposure in coaching and facilitating skills transfer to nationals

It will also be beneficial if you have:

• Underground mine construction experience
• Experience in dealing with packages related to the supply of mechanical and piping equipment and material
• Experience managing International engineering service providers/design houses as part of the Owner’s team.

What we offer

• A work environment where safety is always the number one priority
• International relocation and visa assistance if required
• Competitive package
• Career development to further your ambitions
• Access to top tier family-friendly health and medical programs
• Employee Assistance Program
• Ongoing individual wellbeing support for you and your family for personal and professional matters.
• Leave for all of life’s reasons (vacation/ annual, paid parental, sick leave).

About us

Joining the Rio Tinto Oyu Tolgoi Underground Operations team is a great opportunity to be part of one of the most exciting developments in copper and gold mining for several decades. The mine contains reserves and resources that make it one of the world’s largest copper-gold deposits.

This mega mining operation is expected to be a major contributor to Mongolia’s development. As part of the Rio Tinto Oyu Tolgoi Underground Operations team, you can contribute to something significant and learn and develop both personally and professionally. We offer a collaborative, high performing environment where success is achieved by working together.

Discover more about Mongolia and Oyu Tolgoi

Mongolia is increasingly becoming a destination for tourism and expatriate residents. As a rapidly developing city, Mongolia's capital Ulaanbaatar is seen as a comfortable, yet exciting place to live. With an array of cultural and social activities available and a growing network of international schools, housing options, and leisure facilities, its home to a growing community of international expatriates.

Located in the South Gobi Desert, just 80 kilometres from the Chinese border, the Oyu Tolgoi open pit mine and camp is a large, well-run and comfortable site with multiple amenities including recreational and sports facilities, a cinema, shops, restaurants and bars catered to a growing community. For more information about OT site, please check out this video.

Where you’ll be working

Oyu Tolgoi is an operating Copper / Gold open pit mine with a brownfields underground mining project. The site is located in the Gobi Desert region of Mongolia. The reserves case for the underground project is in the order of 0.5 billion tonnes of ore to be mined from the 95,000 tonnes per day Hugo North Lift 1 (HNL1) panel cave mine with a 20-year operations life. There is also the potential for 3 further block cave districts to increase mine life beyond 100 years.

Every Voice Matters

At Rio Tinto, we particularly welcome and encourage applications from Indigenous Peoples, women, the LGBTQIA+ community, mature workers, people with disabilities and people from different cultural backgrounds.

We are committed to an inclusive environment where people feel comfortable to be themselves. We want our people to feel that all voices are heard, all cultures respected and that a variety of perspectives are not only welcome – they are essential to our success. We treat each other fairly and with dignity regardless of race, gender, nationality, ethnic origin, religion, age, sexual orientation or anything else that makes us different.

Job application closes on Jan 30, 2026

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Respect and Inclusion

At Rio Tinto, we particularly welcome and encourage applications from Indigenous Peoples, women, the LGBTQIA+ community, mature workers, people with disabilities and people from different cultural backgrounds.

We are committed to an inclusive environment where people feel comfortable to be themselves. We want our people to feel that all voices are heard, all cultures respected and that a variety of perspectives are not only welcome – they are essential to our success. We treat each other fairly and with dignity regardless of race, gender, nationality, ethnic origin, religion, age, sexual orientation or anything else that makes us different.

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