Site Engineering Manager in Trois-Rivières

Mantel is developing the first molten-salt-based carbon capture technology which is designed to operate at the high temperatures found inside boilers, kilns, and furnaces – enabling highly efficient carbon capture that has not been possible until now. Carbon capture can be applied across industries to reduce emissions and achieve net-negative emissions. By solving for efficiency, Mantel can cut costs substantially, unlocking carbon capture’s role in reaching net zero emissions by 2050.

This role requires 1-2 years of FULL-TIME travel (or relocation) to Trois-Rivieres, Quebec and can transition to a remote job after that.

What You’ll Do

• Demonstration Project Support
  • Support engineering execution on-site from test plan through steady-state operation
  • Translate P&IDs, process designs, and engineering packages into installed, commissioned systems in the field
  • Manage day-to-day technical activities on-site: contractor coordination, punch lists, field modifications, and issue resolution
  • Monitor system performance against design intent and flag technical issues clearly and quickly
• Site Relationships & Coordination
  • Serve as Mantel's day-to-day engineering point of contact with the host site and its technical teams, alongside the Commissioning Director
  • Coordinate with EPC contractors, equipment vendors, and host-site operations staff
  • Maintain a safe, professional, and collaborative site environment at all times
• Documentation & Reporting
  • Maintain accurate site records: as-builts, field change notices, commissioning logs, and performance data
  • Produce clear, concise site updates and engineering reports for the VP of Engineering and broader project team
  • Feed lessons learned back into the engineering base for future deployments
• Performance Monitoring & Feedback
  • Support data collection and system monitoring for technical validation of the demonstration
  • Surface field observations and operational insights that inform design refinement and scale-up
  • Work closely with the engineering team to close the loop between design intent and real-world performance

Who You Are

• Experience: 6+ years in process, mechanical, or chemical engineering with hands-on site or field engineering experience, including at least one commissioning or startup campaign
• Education: B.Eng. or B.S. in Chemical, Mechanical, or Process Engineering
• Legal to work in either the United States or Canada
• You’ve been on-site during startup/turnarounds and know what it takes to get a system running - you don't need someone to walk you through it
• You read drawings, write procedures, and close punch lists - your documentation is clean and complete
• You're comfortable working in industrial environments alongside operators, contractors, and plant engineers
• You think on your feet when things go sideways, and you communicate problems clearly
• You have genuine curiosity about carbon capture and the role industrial decarbonization plays in reaching net zero

What You'll Get:

• A central role in building one of the most exciting carbon capture companies in the world
• Meaningful technical contribution from day one, with growing scope as the project portfolio expands
• Close collaboration with a small, high-caliber engineering and commercial team
• A clear path toward senior engineering leadership as Mantel scales
• We provide competitive and holistic compensation to all our full-time team members, including:
• Highly competitive pay based on experience, including equity
• 90% subsidized medical and dental healthcare coverage for employees, 50% for dependents
• Unlimited vacation policy, mental health personal days, generous sick leave, plus a week-long winter break at the end of December
• Health/Fitness and cell phone stipend
• Paid parental leave