RJ O'Neil

RJ O'Neil is a mechanical contractor that installs, maintains and repairs HVAC-R, plumbing and pipefitting systems for municipal, industrial, commercial and residential customers. The company traces its start to 1926, when Roy O'Neil opened a steamfitting business, and it has since expanded into process piping and commercial plumbing. Its clients include healthcare facilities, schools, park districts, wastewater plants and retail spaces, and it takes on new construction and expansion projects.

Customers can call around the clock for emergency service, and the company offers free consultations and maintenance packages. Each project has one project manager from start to finish. RJ O'Neil is certified as both woman-owned and minority-owned, and its office is in Montgomery, serving the Chicagoland area.