Intermediate Process Engineer

Company:

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 chemical/process engineer with strong technical 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 support planning and execution of 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 and thrive in dynamic environments, we want to hear from you.

We operate on a hybrid schedule (4 days in the office, 1 day remote) to keep our collaboration tight and our momentum fast.

Key Responsibilities

• Complete engineering design calculations (heat & mass balances) and create typical engineering design deliverables, BFDs, PFDs, datasheets and reports etc.

• Support and lead 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

• Support 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

• 6+ 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 mindset

• 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.

Why Join Us?

We offer a dynamic environment with opportunities for professional growth, technical challenges, and leadership experience. Our team values communication, teamwork, and rigorous problem-solving to tackle industry challenges. We offer a competitive salary, benefits package, and opportunities for career advancement. Be part of a pioneering company driving the future of chemical recycling and sustainability and contribute to solving real-world environmental challenges while working with passionate and dedicated colleagues.