Lead Process Modeling Engineer

EMPLOYMENT Full-time

LOCATION Kenilworth, NJ

REPORTS TO VP of Commercialization

CLOSE COLLABORATION WITH CTO, technical team

SALARY RANGE Starting at $179k

Position Summary

Still Bright is bringing the first viable hydrometallurgical alternative to copper smelting to market at a moment when global copper demand is outpacing supply by historic margins. Our proprietary RACER (Rapid and Complete Electrochemical Reduction) process delivers fast, complete copper extraction while recovering precious and critical co-products, and as a closed-loop system it offers precise control over outputs and radically reduces environmental impact.

Backed by top-tier investors including Breakthrough Energy Ventures and Material Impact, our team is moving from pilot execution into the next stages of commercial deployment.

As the Lead Process Modeling Engineer II, you sit at the heart of Still Bright's commercial strategy. Reporting to the VP of Commercialization and working in close, regular collaboration with the CTO, you own the digital product of our process, comprised of the paired SysCAD process model/digital twin, our in-house techno-economic analysis (TEA), and the life-cycle assessment (LCA) that rides on it, that turns process decisions into the defensible cost, energy, and recovery numbers that prove Still Bright's value proposition.

You own the modeling and TEA architecture end to end: the shared model/TEA/LCA structure, the results-cache and sensitivity/Monte-Carlo framework, and the RACER process basis the models are built on. The lead process modeling engineer will build models to explore process optionality, feedstock variants, co-product routes, and scale-up from lab through demo to commercial.. Finding new methods to advance Still Bright's value proposition is a key expectation of this role.

Key Responsibilities

• Process Model Ownership: Own and evolve the high-fidelity SysCAD digital-twin and commercial-scale process model architecture. Manage third-party consultants as needed to ensure models accurately reflect the chemistry of our closed-loop system.

• Predictive Capability: Work with the VP of Commercialization to craft customer-specific value propositions. You will transform raw feedstock data into detailed economic and environmental projections.

• TEA, LCA, and Financial Model Integration: Lead Techno-Economic Analysis and Life Cycle Assessment work to quantify cost savings and value addition, showing customers RACER economics and environmental impact. Ensure every process-optionality and feedstock configuration is wired into the in-house TEA and subsequent financial model so a model run flows straight through to mine-level economics.

• Predictive Capability & Customer Value Propositions: Work directly with the VP of Commercialization to craft customer-specific value propositions, transforming raw feedstock data into detailed economic and environmental projections for global mining companies.

• Feedstock-to-Process Tooling: Build and lead a proprietary model that ingests complex mineralogical data and determines the optimized process configuration for a given feedstock.

• Electrochemical & Thermodynamic Modeling: Model the electrochemical unit operations (electrolyzers, electrowinning) — Faradaic/charge balance, current and power draw, cell sizing, efficiency and degradation — and integrate rigorous aqueous-speciation thermodynamics (OLI Systems or equivalent) for multi-solute electrolyte solubility, precipitation, and impurity behavior.

• Model–Plant Validation & Data Integration: Reconcile model outputs against lab and pilot data, close mass and energy balances, and build repeatable validation workflows. Own the accuracy standard for the model.

• Software & Reproducibility: Build the model + TEA/LCA system as…