---
title: "Process Engineer"
company: "Mariana Minerals"
company_url: "https://www.remjobs.works/companies/mariana-minerals"
url: "https://www.remjobs.works/job/mariana-minerals-process-engineer-65804e7b-3e7d-4dee-9950-0365666526e5"
apply_url: "https://jobs.ashbyhq.com/marianaminerals/a61ece5b-1e04-420e-8504-ae594149be52"
workplace: onsite
location: "East Texas"
employment_type: full-time
seniority: mid
role: software-engineering
region: united-states
date_posted: 2026-08-24T16:56:44.934Z
first_seen_by_remjobs: 2026-09-05T08:28:22.654Z
---

# Process Engineer

**Mariana Minerals** · East Texas

Apply: https://jobs.ashbyhq.com/marianaminerals/a61ece5b-1e04-420e-8504-ae594149be52

## About Mariana Minerals

Mariana Minerals is a software-first, vertically integrated minerals company focused on supplying the minerals critical to modern energy, AI, and defense technologies.

## About the role

### About Mariana Minerals

Mariana Minerals is a software-first, vertically integrated minerals company on a mission to supply the critical minerals powering modern energy, AI, and defense technologies. We’re reimagining the minerals supply chain by combining deep industry expertise with advanced software, automation, and data-driven decision-making.

**Position Summary:**

We are looking for a Senior Process Engineer to work with our innovative, fast-paced multidisciplinary team. They will be responsible for liaising between R&D and operations, with a focus on chemical process development, successful scale-up of new product execution, and sustaining technology-manufacturing readiness. This person must be flexible, proactive, and professional with experience in scale-up and process development applications such as chemical refining, hydrometallurgy, minerals, and chemical processing.

**Key Responsibilities:**

- Lead the development and scale-up of lab processes on pilot and production scales, with a focus on improving metal recovery and reducing cost and environmental impact.

- Identify potential process risks, and propose, and evaluate solutions to mitigate the risks.

- Evaluate process capability, improve process control, and deliver samples to customers.

- Conduct detailed process simulations and modeling to predict process behaviors under various scenarios.

- Develop, prepare, and provide detailed production and process guidelines, including: standard operating procedures (SOPs), process flow details, safety, and quality standards.

- Improve and troubleshoot products, equipment, and process issues during production.

- Provide technical leadership and mentorship to junior scientists, engineers, and technical staff.

- Guide the R&D team and any external partners in the design and execution of experiments to develop the required base data for chemical process design.

- Drive chemical process design and development from the concept stages to scaled production, ensuring quality is maintained throughout the lifecycle of the project.

- Develop and model potential process designs for scale-up and cost estimating based on lab-scale chemical processes.

- Identify potential process risks, and propose, and evaluate solutions to mitigate the risks.

- Evaluate process capability and improve process control.**Required Qualifications:**

- A bachelor’s degree in chemical engineering or a related discipline is required.

- 3-5 years of experience in Chemical Process and/or Development Engineering required.

- Hands-on experience scaling processes from R&D to an operating environment.

- Expertise in process modeling, development, control, and scale-up.

- Coordinate and execute bench-top, pilot, manufacturing scale-up, and verification batches with speed and robustness.

- Proficient in using software for process analysis and modeling.

- Sound understanding of chemical processes and their scale-up.

- Strong leadership and interpersonal skills for implementation of cross-functional process improvements.

- Strong background in analytical & quantitative skills for problem-solving of large/complex problems & proven ability in decision-making**Desired Qualifications:**

- Hydrometallurgy experience

- Mining experience

- Battery material experience

#### Our culture is built on four principles:

**Everyone Gets Home Safe. **We never put speed or cost ahead of people.

**Extreme Ownership. **We take full responsibility for outcomes, relentlessly driving toward solutions.

**Engineer Out Requirements, then Automate. **We simplify, optimize, and then automate for scale.

**Share Your Legos.** We collaborate openly, share knowledge, and empower each other to build bigger, better solutions.

**Join us as we build the future of responsible mineral sourcing and supply!**

---

Source: Mariana Minerals's own career page, read by RemJobs. Canonical HTML version: https://www.remjobs.works/job/mariana-minerals-process-engineer-65804e7b-3e7d-4dee-9950-0365666526e5