3.2. Senior Chemical Process Engineer-Separation
Phoenix Tailings
Other Engineering
Burlington, MA, USA
USD 120k-160k / year + Equity
Posted on Nov 1, 2025
About Phoenix Tailings
Phoenix Tailings is a rapidly growing clean mining and metals production startup dedicated to sustainable and economic critical metals production. Our mission is to be the world's first fully clean mining and metals production company, producing the resources needed for the next generation of our economy.
Why Phoenix Tailings
At Phoenix, we believe that nothing great is ever accomplished alone or without the passion of people who push and motivate one another. If you are someone who shares our relentless pursuit of a better future, passion for innovation, and are excited about working with some of the top innovators in the world, then this is the place for you.
Our Values
● You are only crazy if you are wrong, it’s ok to be wrong
● Lead with Compassion
● Be Resourceful
● Listen
● Hustle
Who We Are Looking For
Phoenix Tailings is seeking a Senior Chemical Process Engineer who thrives at the intersection of lab work and industrial process development. In this role, you’ll focus on designing, optimizing, and scaling solvent extraction systems to separate and refine rare earth elements — a cornerstone process in our clean production pathway. This is a hands-on, impact-driven role where your contributions will directly accelerate our mission to establish a domestic, sustainable supply of critical materials.
Key Responsibilities:
- Execute solvent extraction process development for rare earth element separation, from bench to pilot scale
- Design and operate solvent extraction experiments, evaluating efficiency, selectivity, and stability of reagent systems
- Assist in scaling up processes through data analysis, process modeling, and mass/energy balance development
- Contribute to the design of pilot-scale equipment including mixer-settlers, columns, or centrifugal contactors
- Analyze experimental results to recommend design or operating condition changes that improve process performance
- Develop and maintain process documentation including SOPs, PFDs, and process data logs
- Support technology transfer from R&D to operations, including commissioning, startup, and troubleshooting
- Maintain a strong focus on safety, chemical handling, and environmental stewardship in all aspects of process work
- Collaborate with a cross-functional team of chemists, metallurgists, and engineers to deliver on project milestones
Qualifications:
- M.S. or B.S. in Chemical Engineering, Metallurgical Engineering, or related field with 5+ years of industrial experience
- Hands-on experience with solvent extraction for rare earth or critical metal separation
- Solid understanding of phase separation dynamics, reagent selection, and extraction circuit design
- Demonstrated ability to operate lab and pilot-scale chemical processes safely and effectively
- Familiarity with process simulation and modeling tools (e.g., METSIM, Aspen, or similar)
- Strong analytical and data interpretation skills with an experimental mindset
- Experience working in a fast-paced, startup, or R&D-intensive environment is a plus
- Excellent communication and technical documentation skills
We offer a competitive compensation package that is based on expertise. We also offer the following benefits:
- 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.
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: $120,000- $160,000 total cash compensation plus equity
At Phoenix Tailings, we have an open culture that values learning, and we are looking to grow the team with enthusiastic individuals who share our vision of sustainable mining.
Phoenix Tailings, Inc. is an Equal Opportunity Employer, and we value diversity at all levels. All qualified candidates will receive consideration for employment without regard to race, color, religion, sex (including gender identity, sexual orientation, and pregnancy), national origin, age, disability or genetic information, or any other applicable protected characteristics, and these characteristics will not be a factor for consideration of any work-related decisions (including but not limited to hiring, firing, compensation, and discipline).
