Greentown Labs

2.1 Senior Process Engineer – Hydrometallurgist

Greentown LabsBurlington, MA, United States

Nonprofit climatetech incubator with labs in Boston and Houston supporting startups across energy, buildings, agriculture, and transportation More about Greentown Labs

Undisclosed Salary

Permanent

NewPosted yesterday

Mode of work

Full-time

Experience

Senior

Employment type

Permanent

Location

On-site

Expertise & Skills

Hydrometallurgical Process DesignExpert
Wet ChemistryExpert
Leaching & PrecipitationExpert
Pilot-Scale DevelopmentExpert
Process OptimizationProficient
Experimental DesignProficient
Team LeadershipProficient
Aqueous ProcessingProficient

Job description

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 required to power the technology of today and tomorrow. 

Why Phoenix Tailings 

At Phoenix, we’re building more than technology—we’re building the future supply chain for critical and rare earth metals. This work matters. It demands urgency, rigor, and creativity. You’ll join a team that values ownership, technical excellence, and the courage to challenge legacy approaches to mining and metals production. 

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 Process Engineer- Hydrometallurgist to lead hands-on process development, optimization, and scale-up of hydrometallurgical systems for critical and rare earth metals production. This role is ideal for someone with deep technical experience in wet chemistry, aqueous processing, leaching, precipitation, separation, purification, and pilot-scale development who wants to build real-world industrial processes, not just model them. 

This position will play a key role in translating laboratory results into scalable process designs that support Phoenix Tailings’ transition from R&D to commercial deployment. You will work closely with R&D, engineering, and pilot operations teams to design experiments, troubleshoot complex process challenges, develop operating parameters, and guide junior engineers and scientists.

Frequently asked questions

Where is the 2.1 Senior Process Engineer – Hydrometallurgist role based?
This is an on-site role based in Burlington, United States.
What experience level does the 2.1 Senior Process Engineer – Hydrometallurgist role require?
Greentown Labs lists this 2.1 Senior Process Engineer – Hydrometallurgist role at Senior level.
What skills do you need for the 2.1 Senior Process Engineer – Hydrometallurgist role?
Key skills for this role include Hydrometallurgical Process Design, Wet Chemistry, Leaching & Precipitation, Pilot-Scale Development, Process Optimization and Experimental Design.
How do I apply for the 2.1 Senior Process Engineer – Hydrometallurgist role?
Use the Apply button on this page to apply for the 2.1 Senior Process Engineer – Hydrometallurgist role on Greentown Labs's careers site.

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