Principal Engineer; Mineral Processing

Job Overview

Kelly Science is seeking a Principal Engineer (Mineral Processing) for a growing client located in Stamford, CT.

Salary: $,000/year

Employment Type:

Full Time;
Direct Hire

Travel expectation: 40% both domestic and international

Work Model: on-site in Stamford, CT – relocation assistance available for qualifying candidates

Join our client’s Mineral Processing R&I team and help drive innovative technologies and products for Mining Solutions. As Principal Engineer, you’ll collaborate with scientists, engineers, and technical experts to lead research, design lab and field tests, and commercialize solutions that deliver value to our customers.

• Lead R&D programs for new mineral processing products and technologies
• Design and run lab and field tests to validate new products
• Provide strategic input and propose new ideas for innovation
• Develop and share product knowledge with the team
• Conduct pilot and industrial trials with project teams and customers
• Communicate findings internally and externally
• Collaborate across departments to achieve innovation goals
• Support patent applications and protect IP
• Stay updated on industry trends and represent the company at conferences
• Advise and support key customers with expert recommendations
• Mentor and coach R&I colleagues and global TS&D team members

• Master’s degree or PhD in Mineral Processing, Metallurgy, Materials Science, Surface Chemistry or a related scientific field preferred
• At least 8 years’ experience working with specialty chemicals, particularly in mining and chemical technology commercialization
• Strong hands‑on background in laboratory, pilot, and industrial‑scale flotation processes
• Solid knowledge in at least one of the following: chemistry, mineralogy, colloid and surface chemistry, or electrochemistry
• Familiarity with experimental design, statistics, and data analysis is a plus
• Ability to mentor and coach others in new methods and flotation technologies
• Willingness to travel up to 40% both domestically and internationally

Interested? Please apply today for immediate consideration!

Kelly supports those who work with us through a variety of benefits and work‑related resources. Eligible employees have voluntary benefit plans including medical, dental, vision, telemedicine, term life, whole life, accident insurance, critical illness, a legal plan, and short‑term disability. As a Kelly employee, you will have access to a retirement savings plan, service bonus and holiday pay plans (earn up to eight paid holidays per benefit year), and a transit spending account.

Employees are entitled to earn paid sick leave under the applicable state or local plan.

Kelly is committed to providing equal employment opportunities to all qualified employees and applicants regardless of race, color, sex, sexual orientation, gender identity, religion, national origin, disability, veteran status, age, marital status, pregnancy, genetic information, or any other legally protected status, and we take affirmative action to recruit, employ, and advance qualified individuals with disabilities and protected veterans in the workforce.