Freelance Minerals Processing Engineer Jobs in Arizona

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Date: Jul 23, 2026

Location: Tucson, AZ, US

Company: Hatch

Job Category:Mining; Metals

Location:Tucson,AZ,United States

Join a company that is passionately committed to the pursuit of a better world through positive change. With more than 70 years of business and technical expertise in mining , energy , and infrastructure ,our 10,000 colleagues in 150 countries tirelessly work toward bettering the industries in which we operate. With practical solutions that are safe, innovative and sustainable, we think globally while acting locally.Are you looking for an opportunity to join a diverse group of professionals who are committed to remaining exceptional? We look forward to hearing from you.

If it isn't grown, it's mined. Our mining and metals teams help our clients to safely and sustainably mine the minerals and metals used in our everyday lives. Want to play a part of innovating and optimizing the mining life cycle on greenfield and brownfield facilities?

We have an exciting opening for an experienced Senior Minerals Processing Engineer to join our team on a full-time basis. You will be given the opportunity to work in collaboration with both internal staff and our clients to provide effective execution, coordination and supervision of mining, minerals processing and geometallurgical laboratory and fieldwork.

You will become involved in a wide variety of Projects - from brownfield optimisation, expansion studies to greenfield.

This role will involve execution, coordination and supervision of mining, minerals processing and geometallurgical laboratory and site/fieldwork, execution of technical reports and engineering documentation, identification of project opportunities, mathematical modelling, simulation (in comminution and flotation areas extended to understanding and integration with drill and blast, throughput forecasting and geometallurgy), field test work for integration and optimisation of existing mining and minerals processing operations, expansion studies and greenfield - design projects.

We are looking for someone with good communication skills as writing technical reports and completion of engineering documentation for our customers will be a key part of this role.

• Assist with implementation of projects train, liaise with internal Hatch engineers and clients in the region on Hatch Australia technology, methodology, mathematical models and tools/systems for Mine to Process Integration and Optimisation.
• Execution, coordination and supervision of laboratory and fieldwork
• Write technical reports and engineering documentation
• Process optimisation – ore characterisation, drill and blasting, crushing, grinding, flotation, concentration
• Process flowsheet development, equipment sizing and selection, circuit design, process flow diagrams (PFD) and process instrumentation diagrams (PID) development and review
• Mining and process support during commissioning of new circuits and expansions,
• Mass and metallurgical balance, mathematical modelling and simulation of comminution, flotation, concentration circuits, throughput forecasting and geometallurgical modelling
• Site and remote process monitoring and support
• Training clients

We are seeking applications from candidates who are analytical by nature, solution driven and passionate about minerals processing, the provision of exceptional client service and team collaboration.

• Experience in Minerals Processing with proven knowledge in the fields of comminution, classification,flotation and geometallurgy
• Knowledge of mathematical modelling and simulation and experience in the use of mass balance and process simulation software (JKSimMet, JKSimFloat, Limn, Metsim, and SysCad)
• Experience in industrial sites covering production, optimisation and development projects in crushing, screening, grinding, flotation and geometallurgy
• Experience in circuit survey organisation and execution, sampling, rock characterisation, breakage and grinding test work, fragmentation assessment using image analysis, work co-ordination, data analysis and treatment, mathematical modelling and simulation, report writing and presentation.
• Knowledge about mining operations and interactions with the processing plant.
• Materials characterisation tests, laboratory, pilot and industrial scales experience.
• Experience in equipment/circuit design and commissioning
• Advanced computer and analytical skills
• Develop and evaluate concentrator flowsheet options
• Explain complicated technical issues in simple logical terms
• Liaise and interface with all levels involved in a project since operators, engineers to managers
• Good communication to clients and staff verbally and in writing

• Collaborate on exciting projects to develop innovative solutions

Don't meet every single requirement? You don't need to. At Hatch, we are building a diverse, inclusive workplace that fosters innovation.

We're committed to fostering a workforce that reflects the diversity of the communities in which we operate and serve. Hatch is an Equal Opportunity Employer that considers applicants without regard to age, race, color, national origin, citizenship, religion, creed, gender, sexual orientation, marital status, disability, veteran, or any other protected status. If you have any accommodation requirements, please let us know. We'll do our best to meet your needs in accordance with applicable local legislation.