Site Engineering Manager

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. To learn more, go to: https://mantelcapture.com/

The Site Engineering Lead is Mantel's technical presence on the ground. You'll work closely with the VP of Engineering and Commissioning Director on-site to support execution of Mantel's first demonstration project - managing day-to-day technical activities and making sure nothing falls through the cracks in the field.

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:1. 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

3. 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

4. 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

5. 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

Put differently,

• 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: 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