# Engineering Technician

**Company:** [Mariana Minerals](https://hotfix.jobs/companies/mariana-minerals)
**Location:** San Francisco, CA
**Role:** Other
**Salary:** $40 – $50/hr
**Experience:** 3+ years
**Skills:** Process Equipment Design, Sop Creation, Pfds, P&Ids, Equipment Troubleshooting, Pilot Plant Operations, R&D Scale-Up, Inorganic Chemistry, Mass Balance, Fluid Handling, Solid-Liquid Separation
**Posted:** 2026-06-16

> Hands-on Engineering Technician supporting pilot plant R&D, equipment design, and process optimization for critical minerals refining. Requires 3+ years of pilot plant or industrial operations experience and a bachelor's in engineering or materials science.

## Job Description

## Responsibilities
- Support bench-top R&D, pilot-scale experiments, technical evaluations, and other scale-up trials
- Monitor, troubleshoot, and optimize equipment performance
- Drive evaluations of recovery, throughput, product quality, and equipment reliability
- Assist with equipment design, installation, commissioning, and modification
- Create SOPs, engineering drawings, and other process design documentation
- Train on all pilot plant operating steps and fill in when needed to help keep pilot plant running to plan

## Requirements
- Bachelor’s degree in engineering, materials science, or equivalent field
- 3+ years of hands-on pilot plant, R&D scale-up, or industrial operations experience
- Experience supporting experiments, process trials, or equipment testing
- Ability to collect quality data, document observations, and communicate results clearly
- Experience with process equipment design, procurement, setup, and troubleshooting
- Strong understanding of pH, inorganic chemistry, mass balance, fluid handling, and solid-liquid separation
- Experience creating and maintaining SOPs, PFDs, P&IDs, and equipment/process design documentation

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