Founded in 2019, Brimstone is an innovative industrial startup with a proprietary, efficient, and deeply decarbonized process for producing Ordinary Portland Cement. We’re now growing our all-star team of sharp, mission-driven, collaborative professionals as we continue to refine our process and move towards construction of our first production facilities.

Job Brief

The Plant Engineer on the Engineering team will be responsible for pilot level operations of hydrometallurgical and pyrometallurgical equipment. Tasks will involve evaluation and modifications of equipment and operational procedures as necessary. Providing support for technicians to operate equipment and gather necessary samples and measurements. This position reports to the Director of Engineering Project Management.

This role starts in Oakland, California and must be worked as an on-site position. Role is intended to graduate to other sites in Nevada or Colorado in 2026.

Key Focus Areas of the role may include:

• Assemble and operate Unit Operation scale pilot equipment, including tanks, pumps, mixers, screw feeders, filters, kilns, and emissions control systems.

• Develop Standard Operating Procedures with support of the discipline engineers for operation of pilot scale equipment and larger.

• Collaboration with process teams to develop pilot operational test plans with a focus on technical derisking for scale-up activities.

• Develop and maintain inventory of spares for equipment.

• Cross training in relevant pyrometallurgical and hydrometallurgical evaluations.

• Steward of employee and environmental safety through cross collaboration with team members.

• Development and execution of sampling plans and compilation of analytical measurement data.

For this role, we’re looking for:

• Bachelor's (or Advanced) Degree in Chemical Engineering, Mechanical Engineering, Metallurgical Engineering

• 3-4 years equivalent experience in a plant or startup environment

• Experience with pilot scale equipment, both manually and control system operated

• Experience with safe process sampling techniques, sample preparation, and analysis of samples using XRD, XRF, and ICP

• Experience with fluid mechanics, heat transfer, mass transfer, and chemical conversion calculations as it pertains to single unit operations

• Experience with Hydrometallurgical or Pyrometallurgical equipment

• High temperature equipment (>1000°C) such as Hearth Kilns, Rotary Kilns, Fluidized Beds, or spray roasters

• Solid and liquid separations techniques: filtration, settling, clarification, product washing, drying

• Regular travel as needed

Additional skills that are preferred but not required:

• Experience with building permitting requirements

• Experience with a control system platform used in an industrial environment

• Experience with emissions compliance

• Experience with conducting equipment maintenance

• Design experience with CAD with a focus on machine improvements and guarding

Compensation, Benefits, and Perks

• Salary range for this role is $125,000 – $145,000 per year

• Company equity

• 401k retirement plan with 3% company contribution

• Medical, dental, and vision insurance for employees and dependents

• Mental health benefits

• Generous paid time off policy

• 12-weeks of parental leave

• A fun, diverse, and talented team focused on making the biggest impact possible on climate change

In compliance with federal law, all persons hired will be required to verify identity and eligibility to work in the United States and to complete the required employment eligibility verification form upon hire.

Our Commitment to Diversity

Brimstone is an equal opportunity employer committed to diversity, equity, inclusion, and belonging in the workplace. We seek to build a unique team of individuals and create an environment where all backgrounds and experiences are respected and appreciated. We credit our success to the values that we uphold, and to the different perspectives each team member brings every day. We would never intentionally discriminate on the basis of race, color, ancestry, religion, national origin, sex, gender identity or expression, sexual orientation, age, marital status, disability status, pregnancy, veteran status, or any other status protected by federal or state law.

We strive to provide an inclusive candidate experience. If there are any reasonable accommodations that you may need during the interview process, please let us know.