Oneira Corporation, an EPCM* company, is a leading engineering and technology company providing Industrial Process and solutions

Based in Toronto, Canada, Oneira has more than 30 years of experience working with global leaders in the Specialty Chemical, Chemical, Oil & Gas and Mineral Processing industries. Oneira has executed projects around the world ranging in size from small studies to $200 million Greenfield facilities.


BUILD Relationships: Oneira builds long-standing relationships with clients through responsiveness, commitment,  accountability and staff continuity.
See Case Studies

DELIVER Solutions: Oneira delivers inventive solutions for clients through experience, knowledge and collaboration.
See Expertise  

DRIVE Results: Oneira drives measureable results for clients through scalable design, engineering and project management and on-time, on-budget performance.
See Case Studies


*EPCM, a privately-owned Canadian group of companies headquartered in Oakville, Ontario, offers a range of hydrometallurgical technology, engineering, procurement and construction management services, plant maintenance and parts sourcing to heavy industrial clients around the world. The group includes EPCM Services Ltd., Oneira Corporation, EPCM Supply, Tecnologias Cobra S.A. Ltd. (Antofagasta, Chile) and CMT Shanghai Co.