Principal Process Engineer

Worley Group, Inc; Mesa (AZ); On-site; USD 100,000 - 130,000; Full time

Job summary

Worley Group, Inc in Mesa, Arizona, is seeking a Principal Process Engineer to support process engineering front-end studies and design development. The ideal candidate will engage in detailed engineering, commissioning, and start-up activities as required, providing essential process engineering services to Worley and its clients.

Key responsibilities include developing technical specifications, managing complex engineering designs, and ensuring effective communication with project teams. Candidates must possess a Bachelor's degree in a relevant field and substantial experience in mining and minerals.

Qualifications

• Must have 12+ years of relevant experience in mining and minerals.
• Experience in EPCM/Engineering Services is a must.
• Proven leadership experience in process engineering.

Responsibilities

• Support process engineering front-end studies and design development.
• Develop complex engineering designs and solutions.
• Model processes and unit operations.

Skills

Hydrometallurgy experience

Over 12 years in mining and minerals

Strong analytical and problem-solving abilities

Excellent communication skills

Leadership in critical projects

Education

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

Tools

Simulation software

MS Office (Word, Excel, PowerPoint)

Job description

Summary

We are seeking a Principal Process Engineer with mining and minerals experience for supporting process engineering front‑end studies and design development. The ideal candidate will also be expected to move into detailed engineering, commissioning, and start‑up activities, if required. The purpose of this role is to support delivery of successful projects and programmes. You will provide process engineering services to Worley and its customers, including technical support and supervision within the process engineering team.

Responsibilities

• Assists with development, planning and coordination of complex engineering designs entailing technical specifications and detailed planning in the early phases of projects conceptual through feasibility studies.
• Develops solutions to complex problems that require a high degree of innovation and ingenuity.
• Act as a lead discipline engineer on projects or studies.
• Implements, modifies, and maintains processes related to the extraction of base and precious metals.
• Calculates and organizes data for process flow sheets including instrumentation and control considerations.
• Models processes and unit operations.
• Prepares specifications and operating instructions for processing equipment.
• Develops process flow diagram to define heat and material balance.
• Develops process specifications such as comminution, flotation, dewatering, pressure oxidation, heap leaching, etc.
• Participates in planning, cost development and management, and scheduling for assigned projects.
• Directs activities to ensure that construction, installation, and operational testing conform to functional specifications, recognised codes and standards, and customer requirements.
• Maintains effective communication with project team members and with the customer.
• Excellent oral and written communication skills required.

Qualifications

Required

• Bachelor's degree in Metallurgical Engineering, Mineral Processing, Chemical Engineering or equivalent.
• Principal/Lead level (12+) years of mining and minerals experience.
• Hydrometallurgy experience especially in the following areas: comminution, ion exchange, thickeners/clarifiers, filtration, and other solid‑liquid separation operations, slurry pumping, precipitation, flotation, drying/calcining, heat exchangers, solvent extraction, electrowinning, refining, leaching, crystallization, pumping/piping, instrumentation and process control, and simulation software, etc.
• Senior experience of combined process engineering and operations experience with large flotation concentrators, high‑pressure autoclaves, solvent‑extraction, electrowinning, soda ash or potash operations, and precious metal heap leaching.
• Proven experience delivering process engineering in an EPCM/Engineering Services environment.
• Experience across conceptual studies, PFS, FS and detailed engineering, including commissioning support.

Preferred

• Licensed Professional Engineer in Arizona (or able to obtain one in short term).
• Advanced MS Office skills (Word, Excel, PowerPoint) preferred.

Additional Skills

• Excellent verbal and written communication skills, with the ability to interact effectively with diverse clients.
• Strong analytical and problem‑solving abilities to address complex technical and operational challenges.
• Demonstrated leadership in managing critical projects with a focus on safety, efficiency and value optimisation.