About Us

RDi is a metallurgical testing laboratory, firm serving the global mining and minerals industry under the McCarl’s umbrella along with McCarl’s Technical Services that provides process engineering, and McCarl’s Industrial Services provides heavy industrial construction. Together, we test your ore, develop your flowsheet, engineer every detail, build your plant, and commission it to production targets.

End-to-end services for a
one-stop shop.

Founded in 1990 in Wheat Ridge, Colorado, Resource Development Inc. (RDi) is an independent metallurgical testing, process development, engineering, and plant construction firm serving the global mining, minerals, and metals industry. We are more than a laboratory—we are your strategic partner in resource definition, plant design, and construction execution. We provide an end-to-end “one-stop shop” for the global resource industry, transforming mineral resources, by-products, and waste streams into high-value operational reality.

Elevating the business of metallurgy by delivering a fully integrated approach.

Our unique value proposition combines world-class analytical testing, metallurgical engineering, process design, and plant construction under one roof—eliminating the friction, delays, and miscommunication that plague traditional multi-vendor approaches.

WHAT SETS US APART

OUR COMMITMENT TO A ONE-STOP SHOP

What sets RDi apart is our commitment to being a true one-stop shop: from initial exploration and resource definition to flowsheet development, plant design, construction, fabrication, and ongoing optimization. Whether debottlenecking operations, conducting plant audits, or building factories of the future, RDi delivers results that exceed expectations, all while prioritizing environmental stewardship and operational excellence.

In a landscape dominated by large commercial labs and academic research groups, RDi offers a fundamentally different approach:

Your intellectual property remains yours. We operate under clear confidentiality agreements and do not publish, reuse, or cross-apply client data.

We are not a university or research institute. Our success is measured by buildable, operable solutions and client satisfaction—not patents, papers or publications.

Testing, flowsheet development, engineering, construction, fabrication, commissioning, and optimization under one roof.

We design solutions that operators, EPCs, and owners can execute. Better yet, we build them ourselves.

No equipment bias, no vendor lock-in. We specify what works for your ore.

When we build your plant, we tested your ore in our own laboratory, developed the flowsheet in our pilot plant, and engineered every detail.