Senior Metallurgical Process Engineer – Mining & Minerals (US)

Worley; Mesa (AZ); On-site; USD 120,000 - 180,000; Full time

Job summary

Worley is a global professional services firm supporting energy, chemicals and resources with a strong mining focus. The role is based in Mesa, Arizona, and involves leading metallurgical process design for large capital mining projects, coordinating with multidisciplinary teams to deliver safe, cost-effective plant solutions.

The successful candidate will develop and apply metallurgical criteria, interpret testwork, and support from feasibility through commissioning, ensuring alignment with

Qualifications

• Bachelor’s degree in Metallurgical Engineering, Mineral Processing, Chemical Engineering or equivalent.
• 10+ years’ Mining, Minerals & Metals industry experience with strong exposure to metallurgical process plants.
• Proven experience delivering process engineering in an EPCM/Engineering Services environment.
• Experience across conceptual studies, PFS, FS and detailed engineering, including commissioning support.

Responsibilities

• Provide metallurgical and process engineering support for crushing, grinding, classification, flotation, leaching, thickening, filtration, and SX/EW circuits in line with project scope.
• Analyze metallurgical, operating, and plant performance data to identify process improvement, optimization, and debottlenecking opportunities.
• Review, interpret, and apply laboratory, pilot plant, and site metallurgical testwork data to flowsheet development, design criteria, and equipment selection.
• Develop and maintain the process design basis, including metallurgical criteria, recovery targets, throughput assumptions, operating philosophy, and design margins.
• Perform and validate metallurgical and process calculations, including mass balances, metal recoveries, energy and heat balances, and comprehensive water balances.

Skills

Metallurgical process design

Flowsheet development

Testwork interpretation

Education

Bachelor’s degree in Metallurgical Engineering, Mineral Processing, Chemical Engineering or equivalent

Tools

MetSim

Job description

Worley is a global professional services firm supporting energy, chemicals and resources with a strong mining focus. The role is based in Mesa, Arizona, and involves leading metallurgical process design for large capital mining projects, coordinating with multidisciplinary teams to deliver safe, cost-effective plant solutions.

The successful candidate will develop and apply metallurgical criteria, interpret testwork, and support from feasibility through commissioning, ensuring alignment with