3.1. Principal Chemical Process Engineer-Separation

PhoenixTailings

Burlington, MA permanent

Posted: April 30, 2026

Job Description

Key Responsibilities::
• Lead the development and optimization of solvent extraction circuits for rare earth element separation from both primary and secondary sources

• Design and execute bench- and pilot-scale experiments to evaluate separation efficiency, reagent performance, and system dynamics

• Translate laboratory-scale successes into scalable, industrial processes with a focus on safety, sustainability, and cost-effectiveness

• Own and evolve process flow diagrams (PFDs), mass balances, and P&IDs for solvent extraction systems

• Drive selection and specification of extractants, diluents, and equipment (e.g., mixer-settlers, columns, or centrifugal contactors)

• Analyze separation performance data to identify improvement opportunities and implement process changes

• Collaborate closely with metallurgy, chemical engineering, and operations teams to support plant commissioning and troubleshooting

• Author technical reports, scale-up plans, and design documentation to support commercialization of Phoenix Tailings’ extraction technologies

• Stay at the forefront of solvent extraction technologies and rare earth processing trends to inform and elevate process strategy

Qualifications::
• Ph.D. or M.S. in Chemical Engineering, Metallurgical Engineering, or related discipline with 8+ years of relevant experience

• Proven expertise in rare earth element/critical metals separation via solvent extraction, including reagent chemistry, process configuration, and optimization

• Hands-on experience with lab-scale and pilot-scale solvent extraction systems, including safety and operational best practices

• Deep understanding of phase equilibria, thermodynamics, and kinetics relevant to solvent extraction

• Demonstrated success in scaling up chemical separation processes from bench to pilot to commercial scale

• Proficiency with process modeling tools (e.g., Aspen, METSIM, or similar)

• Excellent problem-solving skills with a passion for experimental validation and continuous improvement

• Strong written and verbal communication skills, especially in cross-disciplinary environments

We offer a competitive compensation package that is based on expertise. We also offer the following benefits::
This pay range reflects best estimate for the total cash compensation which includes salary + discretionary bonus for this role. Total package may vary based on experience and qualifications.

Pay Range: $150,000- $180,000 total cash compensation plus equity

• Healthcare: 100% Medical, dental, and vision coverage for employee

• Stock Options: Ownership in a fast-growing venture-backed company.

• Time Off: Unlimited PTO.

• Learning: Learning and development opportunities to grow your skills and career.

Why Apply Through MisuJob?

AI-Powered Job Matching: MisuJob uses advanced artificial intelligence to analyze your skills, experience, and career goals. Our matching algorithm compares your profile against thousands of job requirements to find positions where you have the highest chance of success. This saves you hours of manual job searching and ensures you only see relevant opportunities.

One-Click Applications: Once you create your profile, applying to jobs is effortless. Your resume and cover letter are automatically tailored to highlight the most relevant experience for each position. You can apply to multiple jobs in minutes, not hours.

Career Intelligence: Beyond job matching, MisuJob provides valuable career insights. See how your skills compare to market demands, identify skill gaps to address, and understand salary benchmarks for your experience level. Make data-driven decisions about your career path.

Frequently Asked Questions

How do I apply for this position?

Click the "Register to Apply" button above to create a free MisuJob account. Once registered, you can apply with one click and track your application status in your dashboard.

Is MisuJob free for job seekers?

Yes, MisuJob is completely free for job seekers. Create your profile, get matched with jobs, and apply without any cost. We help you find your dream job without any hidden fees.

How does AI matching work?

Our AI analyzes your resume, skills, and experience to understand your professional profile. It then compares this against job requirements using natural language processing to calculate a match percentage. Higher matches mean better fit for the role.

Can I apply to jobs in other countries?

Absolutely. MisuJob features jobs from companies worldwide, including remote positions. Filter by location or look for remote opportunities to find jobs that match your preferences.

Ready to Apply?

Join thousands of job seekers using MisuJob's AI to find and apply to their dream jobs automatically.