Phoenix Tailings · 4 hours ago
Mechanical Engineer II- Design
Burlington, MA
Full-time
Onsite
Mid, Senior Level
$90K/yr - $110K/yr
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 Mechanical Engineer II to support the design, build, and scale-up of industrial systems used in clean metals manufacturing, focusing on hands-on mechanical design and problem-solving in high-temperature environments.
Advanced MaterialsCleanTechIndustrialManufacturingMiningSustainabilityWaste Management
Responsibilities
Develop, design, and implement mechanical systems to improve facility processes at our Exeter site and Burlington R&D operations
Lead design-for-manufacture efforts for new equipment and facility upgrades, ensuring buildability and operational safety
Conduct testing and validation of mechanical systems, analyzing performance data to recommend design improvements
Create detailed engineering drawings, bills of materials, and specifications for fabrication and assembly
Perform mechanical and thermal calculations to ensure designs meet process and safety requirements
Oversee installation, commissioning, and troubleshooting of new or modified equipment and systems
Drive continuous facility improvement projects to increase system reliability and process efficiency
Collaborate with process engineers and metallurgists to integrate mechanical solutions into critical metals production workflows
Maintain thorough documentation of designs, tests, and changes for knowledge transfer and operational excellence
Qualification
Required
Bachelor's or Master's degree in Mechanical Engineering or a related field
2–6 years of experience in mechanical design for industrial, manufacturing, or process equipment
Strong proficiency with 3D CAD tools (e.g., SolidWorks, Inventor, Creo, or similar)
Experience designing or supporting large industrial systems or equipment
Hands-on mindset with experience supporting equipment build, installation, or commissioning
Ability to work effectively in a fast-paced, startup manufacturing environment
Strong problem-solving skills and attention to detail
Preferred
Exposure to high-temperature systems, thermal processes, or industrial materials
Benefits
Healthcare, we care about you and your family: 100% Medical, dental, and vision coverage
Stock: Ownership in a fast-growing venture-backed company.
Family Focus: Parental leave and flexibility for families.
Time Off: Flexible vacation policy to encourage people to get out and see the world.
Team Fun: Regularly scheduled events, and celebrations.
Learning: Learning and development Opportunities to grow your skills and career.
Great team: Working with fun, hard-working, kind people committed to making a difference!
Flexible culture: 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