2.1 Senior Process Engineer – Extraction

BurlingtonFull Timesenior

EngineeringProcess Engineer

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Requirements Summary

$120,000- $160,000 total cash compensation plus equity Healthcare: 100% Medical, dental, and vision coverage for employee Stock Options: Ownership in a fast-growing venture-backed company.

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EngineeringProcess Engineer

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 with deep experience scaling mining or metals processing operations from pilot or early commercial stages into reliable, high-throughput systems. In this role, you will own core process design decisions that directly impact recovery, throughput, operating cost, and system reliability. Your work will be foundational to Phoenix Tailings’ transition from development-stage technology to full commercial operations—helping secure a domestic, clean supply of critical metals.

Lead process design and scale-up of mining and metals operations from pilot to commercial production

Own mass and energy balances across complex, multi-step processing flowsheets

Define process architecture, operating envelopes, and design criteria to enable reliable, continuous operation

Drive process optimization to increase throughput, recovery, and overall system efficiency

Identify and mitigate scale-up risks related to materials handling, kinetics, residence time, and process control

Support equipment sizing, selection, and specification for large-scale metals processing systems

Develop and review process flow diagrams (PFDs), design bases, and technical documentation for internal and external stakeholders

Partner with operations and leadership to support commissioning, ramp-up, and steady-state performance

Bachelor’s or Master’s degree in Chemical Engineering, Metallurgical Engineering, or a related discipline

7+ years of experience in process engineering within mining, metals, or extractive industries

Demonstrated experience scaling mineral processing or metallurgical systems from pilot or demonstration scale to commercial operation

Strong command of mass balances, process modeling, and flowsheet development

Experience with hydrometallurgical, pyrometallurgical, or combined processing routes for metals production

Proven ability to diagnose process bottlenecks and implement scalable, data-driven solutions

Comfortable operating in fast-moving environments where process design and execution evolve rapidly

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

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.