1.1. Sr. Process Engineer

Burlington, MA
Phoenix Tailings – 1. Engineering /
Full Time /
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 needed for the next generation of our economy.  
Why Phoenix Tailings
At Phoenix Tailings, we believe that nothing great is ever accomplished alone or without the passion of people who push and motivate one another. If you are someone who shares our relentless pursuit of a better future, passion for innovation, and are excited about working with some of the top innovators in the world, then this is the place for you.  

Our Values:
You are only crazy if you are wrong, it’s ok to be wrong
Lead with Compassion
Be Resourceful

Who we are looking for:   

We are looking for a Sr. Process Engineer to join us in pioneering the optimization of processes to extract metals from under-utilized material streams and championing our sustainability initiatives. Your responsibilities include driving quality, efficiency, and sustainability improvements, overseeing initiatives like rare earth separation and scaling up operations. Your expertise will directly impact our refining operations, contributing to a more sustainable and efficient future. Join us and help redefine what's achievable in metallurgy. 

Key Responsibilities:

    • Lead and oversee metallurgical refining processes, including concentration, separation, refining, and casting, to ensure optimal performance and product quality. 
    • Lead the process development of the Phoenix Tailings’ rare earth separation system, taking the project from R&D through the feasibility stage to pilot and commercial-scale operations. 
    • Develop detailed mass and energy balance models to ensure process efficiency and optimization. 
    • Develop and maintain process flow diagrams and piping and instrumentation diagrams to accurately represent system configurations and operating parameters. 
    • Develop and review laboratory test plans to find optimal operating conditions for rare earth separation. 
    • Design and model pilot plant processes and systems to scale up laboratory findings for practical application. 
    • Collaborate with other senior engineers to size and source equipment that meets required specifications for pilot design, build-out, and operation. 
    • Establish project timelines and execute deliverables in a timely manner, ensuring project milestones are met. 
    • Serve as a technical expert in the cross-functional engineering team designing the pilot and commercial-scale processes, including facilitating design reviews and providing technical guidance. 
    • Collaborate with research teams to provide technical expertise, guidance, and support in developing new technologies and refining processes. 


    • Bachelor’s or Master’s Degree in Chemical Engineering, Metallurgical Engineering, or related fields; Ph.D. is a plus but not required. 
    • Minimum of 8-10 years of relevant experience in separation processes for critical materials. 
    • Proven expertise in designing and optimizing solvent extraction processes for efficient critical minerals recovery. 
    • Strong knowledge of environmental regulations and sustainable metals production practices, ensuring compliance and promoting environmentally responsible practices. 
    • Proficiency in process simulation software and materials characterization techniques to analyze and optimize process parameters. 
    • Excellent analytical, problem-solving, and project management skills, capable of leading complex projects from conception to completion. 
    • Effective communication and collaboration abilities, fostering teamwork and knowledge sharing across multidisciplinary teams. 
    • Thrives in fast-paced environments, demonstrating adaptability and efficiency in meeting project deadlines and objectives. 

We offer a competitive compensation package that is based on expertise. We also offer the following 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, annual retreats, and celebrations. 
    • Learning: Learning & 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. 
At Phoenix Tailings, we have an open culture that values learning, and we are looking to grow the team with enthusiastic individuals who share our vision of sustainable mining.   

Phoenix Tailings, Inc. is an Equal Opportunity Employer, and we value diversity at all levels. All qualified candidates will receive consideration for employment without regard to race, color, religion, sex (including gender identity, sexual orientation, and pregnancy), national origin, age, disability or genetic information, or any other applicable protected characteristics, and these characteristics will not be a factor for consideration of any work-related decisions (including but not limited to hiring, firing, compensation, and discipline).