Who We Are

Electronic Support Systems (ESS) is a manufacturer’s representative company offering a complete line of high quality critical infrastructure products supporting IT equipment. Our product line covers power protection, power conditioning, and precision environmental solutions. With these products we are able to provide clean reliable power and precision cooling to maintain our customers IT equipment environments 365 days per year.

Providing solutions for our customers throughout Eastern Missouri and Southern Illinois for over 30 years.

Territory Map

With over thirty years serving the critical infrastructure industry through our investment in factory-trained service and support staff demonstrates the dedication to our customers and the equipment we represent.

Solutions For Industries We Serve

Representing a broad and diverse portfolio of product manufacturers supporting power, thermal, monitoring and management, and rack enclosures.

Electronic Support System's Sister Company

RJI is a sister company of Electronic Support Systems(ESS) and will continue to operate as independent business units to support both the local HVAC and Critical Infrastructure markets.

RJI was founded in 1974 as a manufacturer’s representative of specialized commercial and industrial HVAC equipment. Since that time, RJI Sales has grown to offer a full range of products and services focused on HVAC and Green Engineered Solutions.

In addition to providing specialty equipment and replacement parts, RJI provides full-service solutions to end-users, consulting engineers, and contractors to assist them with high-performance building solutions focused on environmental management.