Process Modeling Engineer
Mariana MineralsSan Francisco, California, United States • Houston, Texas, United States
Posted February 26, 2026
Full Time
About the Company
Mariana Minerals operates as a software‑first, vertically integrated minerals company that extracts and supplies critical raw materials essential to modern energy, artificial intelligence, and defense technologies. By integrating every stage of the supply chain—from exploration and mining to processing and logistics—the firm ensures consistent quality and rapid delivery to high‑tech end users. Its advanced data‑driven approach allows for real‑time optimization of extraction and supply processes, reducing environmental impact while boosting operational efficiency. This combination of digital innovation and end‑to‑end control positions Mariana Minerals as a distinctive partner for companies demanding reliable, sustainable access to strategic minerals.
Job Description
Mariana Minerals seeks a highly motivated Process Modeling Engineer to support the development of next-generation refining processes for critical minerals.
Requirements
- Proficiency in one or more of the following process simulation tools: ASPEN Plus / HYSYS, SysCAD, OLI Studio / OLI Flowsheet, METSIM
- Deep understanding of mass transfer, heat transfer, thermodynamics, fluid flow, and reaction engineering
- Experience developing material and energy balances for multi-step, integrated process systems
- Strong grasp of chemical equilibria and phase behavior in aqueous and non-aqueous systems
- Familiarity with data reconciliation, parameter fitting, and model validation using experimental or operational data
- Competency with Python or MATLAB for model automation, data processing, and custom calculations is a strong plus
- Experience integrating process modeling outputs into EPC deliverables (PFDs, P&IDs, equipment datasheets, control narratives, etc.)
Benefits
- Generous Paid Time Off
- 401k Matching
- Retirement Plan
- Visa Sponsorship
- Four Day Work Week
- Generous Parental Leave
- Tuition Reimbursement
- Relocation Assistance