Critical Minerals Process Engineer - Pilot & Scale-Up

YOH Services LLC; Houston (TX); On-site; USD 72,000 - 103,000; Full time

Benefits offered by this job

Medical benefits

Health Savings Account (HSA)

Life & Disability Insurance

MetLife Voluntary Benefits

Employee Assistance Program (EAP)

401K Retirement Savings Plan

Direct Deposit & weekly pay

Referral Bonus Programs

Certification and training

Job summary

Yoh Life Sciences in Houston, TX seeks a Process Engineer - Critical Minerals to advance brine-processing systems, improve recovery, and optimize product purity and throughput. You will collaborate across engineering, chemistry, operations, vendors, and customer sites to scale up emerging separation technologies while solving hands-on problems.

The role requires 5+ years in process engineering, experience with hydrometallurgy or produced-water treatment, and ability to work in a dynamic startup

Qualifications

• Bachelor's degree in Chemical Engineering or related field.
• 5+ years in process engineering or related environment.
• Experience developing, operating, or scaling chemical/separation processes.
• Knowledge of mass balances, process calculations, and equipment sizing.
• Ability to read and develop PFDs and P&IDs.
• Hands-on in a fast-moving startup environment with changing priorities.
• Strong documentation, communication, and problem-solving skills.

Responsibilities

• Develop and optimize process flowsheets for brine, produced-water, iodine, and lithium recovery systems.
• Translate lab results into pilot, demonstration, and commercial process designs.
• Prepare and maintain P&IDs, equipment specs, SOPs, and process docs.
• Perform mass/energy balances, process calculations, equipment sizing.
• Support design, fabrication, installation, commissioning of pilot/demonstration systems.
• Evaluate unit ops like adsorption, ion exchange, membranes, extraction, filtration.
• Troubleshoot process, mechanical, instrumentation, and equipment issues during pilot operations.
• Track recovery, purity, throughput, reagents, water quality, waste and KPIs.
• Develop sampling plans and interpret brine/product-quality data with analytical teams.
• Support design reviews, HAZOP/HAZID, PSM, MOC, and change management.
• Collaborate with vendors, EPCs, and customer sites.
• Identify opportunities to improve recovery, selectivity, reliability, and operating costs.
• Communicate findings and project status to stakeholders.
• Travel to pilot facilities, customer sites, and project locations.

Skills

Process engineering

Brine processing

Hydrometallurgy

PFDs/P&IDs

Problem-solving

Education

Bachelor's degree in Chemical Engineering

Tools

PFDs

P&IDs

Equipment sizing

Job description

Yoh Life Sciences in Houston, TX seeks a Process Engineer - Critical Minerals to advance brine-processing systems, improve recovery, and optimize product purity and throughput. You will collaborate across engineering, chemistry, operations, vendors, and customer sites to scale up emerging separation technologies while solving hands-on problems.

The role requires 5+ years in process engineering, experience with hydrometallurgy or produced-water treatment, and ability to work in a dynamic startup