Senior Process Engineer: Detailed Plant Design & P&IDs

Mariana Minerals; Georgia; On-site; USD 120,000 - 160,000; Full time

Job summary

Mariana Minerals is seeking a Senior/Staff Process Engineer to execute detailed design deliverables and own their technical content through procurement, construction, and commissioning. You will develop PFDs, P&IDs, hydraulic models, and data-driven workflows to support scalable mineral processing systems.

The role demands 8+ years in industrial process facilities, a BS in chemical/metallurgical/process engineering, and preferably a PE.

Qualifications

• 8+ years of process engineering delivering detailed design for industrial process facilities.
• Detailed-engineering cycle on at least one greenfield or major brownfield project.
• BS in Chemical, Metallurgical, or Process Engineering. PE preferred.
• Familiarity with lithium and/or copper processing options is a plus.

Responsibilities

• Own the process design basis for assigned areas, including design cases, margins, and utility/reagent demands.
• Develop PFDs, heat and material balances, and P&IDs, and manage metadata behind Plant 3D.
• Develop P&IDs from concept through IFC, including equipment, instrumentation, control loops, relief philosophy, drains/vents, samples, and utilities.
• Manage automated workflows for process data behind line, instrument, and valve lists, including line numbers, service conditions, and pressures.
• Build and maintain hydraulic models: line sizing, pump curves, NPSH margin, valve sizing, slurry and two-phase lines, and heat tracing.
• Size and specify process equipment such as pumps, valves, heat exchangers, tanks, and mixers.
• Write the control narratives with controls team support.
• Represent process in PHAs and HAZOPs.
• Coordinate across disciplines (mechanical, electrical, controls, piping, civil-structure).
• Support construction and commissioning: RFIs, walkdowns, loop checks, startup, and as-built closeout.

Skills

Process design

PFDs & P&IDs

Hydraulic modeling

Workflow automation

Cross-discipline coordination

PHA/HAZOP

Education

B.S. in Chemical/Metallurgical/Process Eng

PE preferred

Tools

Plant 3D

SmartPlant P&ID

AVEVA P&ID

Job description

Mariana Minerals is seeking a Senior/Staff Process Engineer to execute detailed design deliverables and own their technical content through procurement, construction, and commissioning. You will develop PFDs, P&IDs, hydraulic models, and data-driven workflows to support scalable mineral processing systems.

The role demands 8+ years in industrial process facilities, a BS in chemical/metallurgical/process engineering, and preferably a PE.