Senior Diffusion Process Engineer

About the role

T1 Energy is looking to hire a Thermal Process Engineer to join our team supporting the process development and ramp of our G2 solar cell fab. This is a hands-on, high-impact role for a process engineer who knows their way around diffusion toolsets and is ready to help build one of the most ambitious domestic solar manufacturing operations in the country.

Responsibilities

• Support thermal doping process integration across the G2 solar cell fab, working closely with equipment, facility, quality, and yield engineering teams.
• Drive process characterization, DOE execution, and data analysis to improve dopant uniformities and throughput.
• Troubleshoot process excursions and equipment issues on diffusion tools and sub-inspection modules, identifying root causes and implementing corrective actions.
• Collaborate with equipment engineers and tool vendors to qualify new tool integrations, execute preventive maintenance reviews, and maintain process baselines.
• Develop and maintain detailed process documentation, including recipes, SOPs, and control plans.
• Optimize process performance through statistical process control (SPC) and lead OEM work inspection development integration with urgency.
• Support technology transfer from development to high-volume manufacturing, ensuring processes are robust, repeatable, and scalable.
• Partner with cross-functional teams including core equipment engineering, material procurement, and manufacturing operations to meet cell efficiency and production targets.

Qualifications

• Bachelor's degree or higher in Chemical Engineering, Materials Science, Electrical Engineering, Physics, or a related field.
• 5+ years of process engineering experience in semiconductor, photovoltaic, or advanced manufacturing environments.
• Hands-on experience with high temperature diffusion toolsets.
• Strong working knowledge of ion implantation processes and diffusion thermal tools.
• Experience with DOE methodology, statistical process control (SPC), micron-level physical inspection and optical/electrical characterization.
• Proficiency with Python, SQL, JMP, and Excel for process monitoring and optimization.
• Strong documentation skills and experience reviewing P&IDs, leading change order processes, writing SOPs, process specs, and engineering reports.
• Ability to support a fab environment, including occasional travel to the G2 facility as needed.

Skills

Experienced working in a clean room setting, with a strong understanding of thermodynamics, transport phenomenon, vacuum systems, electron-hole physics (Hall effect), and thin film characteristics. Deep experience working with high temperature (500 C+), high volume manufacturing equipment with silicon or glass material inputs. Comfortable with chemical characterization including crystal lattice chemistry, quantum field effects, and the principles of oxidation/reduction in gaseous environments; especially considering an application in photon-electron interfaces.

Company Culture

We move fast, expect accountability, and treat people with respect. We also have a no-jerks policy: we don't tolerate big egos, bad behavior or "that's not my job attitude". Be sharp, be honest, be human. If you can hold the line and have a sense of humor, you'll fit right in.