Senior Principal Engineer, Extractive Metallurgy & Scale-Up

Redwood Materials Inc.; San Francisco (CA); On-site; USD 210,000 - 320,000; Full time

Job summary

Redwood Materials is seeking a Principal Engineer, Extractive Metallurgy to serve as the senior technical authority across recycling and refining operations.

You will own the metallurgical basis of design for liberating, separating, and refining metals from recycled feedstocks, spanning mechanical separation, high-temperature processing, hydrometallurgical refining, and electrochemical upgrading of battery metals and other critical minerals.

Qualifications

• Bachelor's or advanced degree in Metallurgical Engineering or related discipline.
• 15+ years of experience in extractive metallurgy or related field.
• Demonstrated ownership of flowsheet deployment from pilot to commercial operation.
• Deep experience in pyrometallurgy or hydrometallurgy.
• Hands-on operating plant experience with ability to travel to sites.
• Experience with comminution and physical separation of heterogeneous feeds.

Responsibilities

• Serves as Redwood's senior technical authority on extractive metallurgy for recycling and refining flowsheets from feedstock through refined product.
• Leads evaluation and selection of flowsheet options, translating bench and pilot data into defensible recommendations for commercial deployment.
• Owns metallurgical basis for product quality specifications, diagnosing impurity deportment and driving root-cause improvements.
• Directs strategy for mineral processing and mechanical separation of heterogeneous feeds, including comminution, liberation, classification, and concentration.
• Guides scale-up from bench through pilot to commercial operation, including mass/energy balances and equipment selection.
• Partners with Business Development to define process pathways and price for new feedstocks and identify offtake markets.
• Advises operations and process teams on recovery and reliability, and mentors the engineering organization to raise metallurgical rigor.

Skills

Plant experience

Pyro/hydrometallurgy

Comminution

Physical separation

Flowsheet deployment

15+ yrs exp

Leadership

Education

Metallurgical degree

Job description

Redwood Materials is seeking a Principal Engineer, Extractive Metallurgy to serve as the senior technical authority across recycling and refining operations.

You will own the metallurgical basis of design for liberating, separating, and refining metals from recycled feedstocks, spanning mechanical separation, high-temperature processing, hydrometallurgical refining, and electrochemical upgrading of battery metals and other critical minerals.