7.4. Mechanical Engineer II - Design

Phoenix Tailings • Burlington, MA

8d • Onsite

About The Position

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 needed for the next generation of our economy. This role is ideal for an engineer who enjoys hands-on mechanical design, working close to hardware, and solving real-world problems in high-temperature, industrial environments. You will work directly with senior engineers, operators, and cross-functional teams to turn concepts into functioning equipment that operates at scale.

Requirements

• 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

Nice To Haves

• Exposure to high-temperature systems, thermal processes, or industrial materials preferred

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.

Benefits

• 100% Medical, dental, and vision coverage for employee.
• Ownership in a fast-growing venture-backed company.
• Unlimited PTO.
• Learning and development opportunities to grow your skills and career.

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level