The WJO service fleet – one of the largest in Southeastern Michigan – is your assurance of prompt, expert service. Our technicians can keep the vital equipment in your building running at maximum efficiency 24/7/365.

Regular service also extends the life cycle of your product or system. The proactive and corrective maintenance of our service technicians maximizes your investment, and when the mechanical service in your building operates efficiently, you save money because it conserves natural resources.

WJO is unique in that we service this equipment, plus we install much of the equipment that we service. W.J. O’Neil can assist in the design and build of entire mechanical systems, boiler installations, heating and cooling equipment installations, and refrigeration installations, installations of industrial process mechanical systems, piping installations, and plumbing.

Our skilled technicians have a broad range of expertise and are licensed to work on the following:

  • Controls Systems
  • Chiller
  • Boilers
  • Built-Up Systems
  • Environmental Chambers
  • Computer Rooms
  • DDC
  • Pneumatic Controls
  • HVAC systems of all kinds

Our programs and services include:

  • Preventative Maintenance programs for all types of mechanical equipment
  • Total Energy Management programs with building automation and control systems
  • Design/Build services providing complete systems design, modernization, or replacement, including retrofit or new installations.
  • We also perform warranty service work for new installations and offers full support capabilities to the life of a customer’s mechanical system.

Controls Division

The WJO Controls Group provides energy-savings solutions to our customers and essential technical expertise to our service division. Designing and installing state-of-the-art web-based energy management systems is a specialty of the Controls Group. These systems deliver greater efficiency with instantaneous information that is easy to access.

Facilities Management

Our Facilities Management Division can help reduce your operating costs and streamline your overall operations so you can focus on your core business. For over 25 years, we have provided expertise to our customers to meet the challenges of today’s modern facilities. Through comprehensive operations and maintenance programs, installation services and safety procedures, we can design a program that will meet your exact needs.

Dependable 24-hour Service

Our 24-hour emergency service means we’re always there for you, day or night. That means no downtime costs because of faulty equipment and lack of maintenance. Plus, our emergency service gives you peace of mind knowing that our technicians can handle any mechanical problems, anytime.

MCSA Green Star logo

GreenStar Designation

W.J. O’Neil is one of only 29 contractors in the country to have GreenStar designation, putting us in the top 1% of MSCA service providers in the United States. We were awarded the GreenStar designation by the Mechanical Service Contractors of America for meeting stringent guidelines for environmental responsibility throughout the company.

LEED Certified

Our highly skilled LEED Accredited Professionals know all the latest green building practices and LEED requirements and processes.

Developed by the U.S. Green Building Council (USGBC), LEED is an internationally recognized green building certification system. LEED certification provides third-party verification that a building or community was designed and built using strategies aimed at improving performance across all the metrics that matter most: energy savings, water efficiency, CO2 emissions reduction, improved indoor environmental quality, and stewardship of resources and sensitivity to their impacts.”

LEED also provides building owners and operators a concise framework for identifying and implementing practical and measurable green building design, construction, operations and maintenance solutions.