9.4. Senior R&D Scientist -Pyrometallurgy

Phoenix Tailings

Phoenix Tailings

Woburn, MA, USA

USD 130k-170k / year + Equity

Posted on May 8, 2026
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—unlocking the materials required for aerospace, defense, and advanced manufacturing while eliminating waste and emissions from mining.
Why Phoenix Tailings
At Phoenix, we believe nothing great is ever accomplished alone—or without the passion of people who push and motivate one another. You’ll be joining a team building the foundational infrastructure for the modern world, developing entirely new ways to produce rare earth and critical metals domestically, cleanly, and at scale.
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 looking for a Senior R&D Scientist to advance high-temperature metallurgical processes and high-vacuum systems that enable cleaner, more efficient production of critical metals. This role is for a hands-on scientist who can design experiments, operate complex thermal and vacuum equipment, and translate process data into meaningful improvements. You will help develop the core technology Phoenix Tailings is building to produce the metals that power the modern world.

Key Responsibilities:

  • Design and execute pyrometallurgical experiments focused on critical metals recovery, refining, purification, and production.
  • Operate and troubleshoot high-temperature furnaces, vacuum furnaces, induction systems, thermal reactors, condensers, pumps, seals, gauges, and related high-vacuum equipment.
  • Develop and optimize process conditions including temperature profile, pressure, atmosphere, residence time, feed composition, reaction pathway, and product collection.
  • Evaluate metal behavior under high-temperature and low-pressure conditions, including volatilization, reduction, condensation, phase formation, impurity removal, and material compatibility.
  • Analyze metals, slags, residues, condensates, and intermediate products to understand recovery, purity, yield, impurity behavior, and process stability.
  • Build process-performance relationships that connect operating conditions to throughput, energy use, product quality, equipment reliability, and scalability.
  • Identify failure modes in thermal and vacuum systems, including leaks, contamination, refractory degradation, material loss, thermal stress, and process instability.
  • Convert experimental data into clear technical recommendations that advance Phoenix Tailings’ clean metals production platform.

Qualifications:

  • PhD in Metallurgical Engineering, Materials Science, Chemical Engineering, Chemistry, Mechanical Engineering, or a related technical field.
  • 2–3+ years of experience in pyrometallurgy, high-temperature processing, vacuum metallurgy, thermal process development, extractive metallurgy, or related applied R&D.
  • Hands-on experience operating high-temperature furnaces, vacuum furnaces, induction systems, thermal reactors, vacuum pumps, gauges, seals, and related equipment.
  • Strong understanding of thermodynamics, phase equilibria, reaction kinetics, heat transfer, mass transport, volatilization, reduction, and condensation behavior.
  • Experience designing and running experiments involving metals, oxides, salts, slags, refractories, reactive materials, or high-temperature process streams.
  • Familiarity with analytical and characterization techniques such as ICP-OES/MS, XRF, XRD, SEM/EDS, TGA/DSC, particle analysis, or related tools.
  • Ability to troubleshoot complex thermal and vacuum systems and translate results into practical process improvements.

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: $130,000- $170,000 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.
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).
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