Founded in 1964 in California by James O. Gierlich and later led by James G. Mitchell until his retirement in 2007, Gierlich-Mitchell, Inc. has built a legacy of excellence in the water and wastewater industry. Today, under the leadership of President Ryan McCloskey, we continue to deliver innovative solutions tailored to the needs of municipalities, contractors, and end users.

At our core, we are a premier manufacturers' representative firm, partnering with more than 30 leading manufacturers of pumps and process equipment. Our comprehensive lineup includes virtually every type of equipment essential for water and wastewater treatment.

With over 60 years of growth, we've expanded our expertise far beyond representation. Our team includes licensed professional engineers specializing in mechanical, electrical, and biological design, along with full field services and Class A general contracting capabilities. This allows us to offer seamless turnkey installations and design-build projects.

What sets us apart is our integrated approach: our engineering and sales teams possess deep knowledge of both equipment technical specifications and the real-world financial implications for projects. We partner closely with consulting engineers, municipalities, and stakeholders across California and Nevada—providing expert guidance on equipment sizing, specification development, and cost-effective solutions that drive project success.

We're committed to helping our clients achieve reliable, efficient, and sustainable outcomes in every application.