Phoenix Tailings · 1 month ago
3.4. Chemical Process Engineer II -Separation
Burlington, MA
Full-time
Onsite
Entry, Mid Level
2+ years expPhoenix Tailings is a rapidly growing clean mining and metals production startup dedicated to sustainable and economic critical metals production. They are seeking a Chemical Process Engineer II who will focus on supporting the development, optimization, and scale-up of solvent extraction processes for rare earth separation, working hands-on in labs and pilot facilities.
Advanced MaterialsCleanTechIndustrialManufacturingMiningSustainabilityWaste Management
Responsibilities
Set up and operate lab- and pilot-scale solvent extraction systems to test rare earth separation processes
Run experiments, collect data, and analyze results to evaluate reagent performance and separation efficiency
Contribute to process development through iterative testing, troubleshooting, and optimization
Support development of mass balances, PFDs, and other process documentation
Assist in scaling up bench-scale results to pilot-scale systems and support commissioning activities
Maintain chemical inventory, ensure safe lab practices, and adhere to all safety protocols
Document experimental results clearly and contribute to technical reports and presentations
Work cross-functionally with engineering and operations teams to ensure experimental designs align with scale-up needs
Qualification
Required
B.S. or M.S. in Chemical Engineering, Metallurgical Engineering, or related field with 2–5 years of relevant industry experience
Hands-on experience with wet chemistry, ideally including solvent extraction or hydrometallurgical systems
Strong data analysis skills and ability to interpret experimental results to drive process improvement
Familiarity with chemical process equipment and lab best practices
Experience preparing PFDs, maintaining lab notebooks, and writing technical documentation
Comfortable working in a fast-paced, evolving environment with a focus on experimentation and learning
Strong communication skills and the ability to work well in a collaborative, interdisciplinary team
Benefits
100% Medical, dental, and vision coverage
Ownership in a fast-growing venture-backed company.
Parental leave and flexibility for families.
Flexible vacation policy to encourage people to get out and see the world.
Regularly scheduled events, and celebrations.
Learning and development Opportunities to grow your skills and career.
Working with fun, hard-working, kind people committed to making a difference!
We are results-focused. We don’t work at the office every day.
Company
Phoenix Tailings
Phoenix Tailings is a metals-refining company that transforms mining waste (“tailings”) into usable rare earth and critical metals.
51-200 employees
H1B Sponsorship
Phoenix Tailings has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (1)
2024 (3)
2023 (1)
2022 (1)
Funding
Current Stage
Growth StageTotal Funding
$104.24MKey Investors
ARPA-EEnvisioning PartnersMassVentures
2025-12-25Series B
2025-12-04Grant· $1.6M
2025-04-30Series B· $33M
Leadership Team
Nicholas Myers
CEO & Co-Founder
Anthony Balladon
Chief Commercial Officer & Co-Founder
Recent News
2025-12-30
2025-12-29
Company data provided by crunchbase