Accreditations and Certifications

ISO-9001:2008 Certified and QOS Compliant

These certifications ensure that WJO as designed and implemented a reliable system of controls the meet customer demands for quality management. Achieving these certifications required a rigorous review process of assessment, document review, and onsite evaluations.

Environmental Stewards

We take pride in helping our customers achieve energy efficiency and conserve natural resources. Our commitment to environmental sustainability began in the last century, and we continue to be a leader in green technology in the 21st century.

LEED Certification

Careful planning is essential to achieving LEED certification, and our highly skilled LEED Accredited Professionals know all the latest green building practices and LEED requirements and processes.

GreenStar Designation

W.J. O’Neil is only one of only 29 contractors in the country to be honored with GreenStar designation awarded by the Mechanical Service Contractors of America (MSCA). Stringent guidelines for environmental responsibility were met throughout the company to earn the award.