Intermediate Process Engineer - Scale Up

Sixone’s mission is to enable a world where blended plastics products can be circularly recycled back into existing supply chains instead of being sent to landfill.

Sixone is a leading technology startup company developing advanced recycling technologies for blended plastics and plastic-based products.

The technology applies process digitalization and advanced analytics to build a recycling system to enable efficient plastics recycling.

Our goal is to revolutionize the economics of recycled materials through innovative processing and materials technologies.

Role Overview: We seek an experienced technical engineer with strong technical hands-on engineering skills, chemical and materials processing , structured problem-solving, and effective communication to join this dynamic, diverse, and forward-thinking technical team.

You will play a pivotal role in translating the company’s technologies into large-scale facilities.

You will be responsible for planning and executing the scale-up tasks, hardware de-risking, working closely with cross-functional teams, stakeholders, and external vendors to ensure technical robustness and communication, and resolving challenges that arise during the project lifecycle.

If you are energized by active problem-solving, thrive in dynamic environments, and prefer hands-on engineering over theoretical analysis, we want to hear from you.

Execute and manage scale-up tasks, including equipment design, development, testing, and optimization. Conduct on-site troubleshooting to address technical and operational issues. Perform process diagnostics and structured problem-solving to ensure robust process design and performance Oversee process integration and planning for optimized operations. Develop clear and actionable technical documentation and maintain effective inter- and intra-team communication to ensure clarity and cross-team alignment. Improve engineering practices through detailed technical analysis and direct engagement with external equipment and process vendors. Foster a pro-active, hands-on culture of accountability, innovation, and continuous improvement. Collaborate with technical and business teams and other stakeholders to align technical developments with long-term goals and strategies. What We Are Looking For 4+ years of process engineering, chemical engineering, or materials science, with strong expertise in chemical or materials processing Proven experience having direct involvement in supporting practical engineering projects, technology scale-up, process design and optimization, or engineering construction Ability to troubleshoot complex engineering challenges and translate technical data into actionable insights through direct engagement Excellent attention to detail, structured problem-solving skills, and a pro-active mindse Strong communication skills and ability to work across multidisciplinary teams Experience in chemical recycling, polymer processing, or waste management is a plus Eligibility to work legally in Canada.