WJ O'Neil Company brings over 40 years of full-service mechanical contracting expertise to facilities managers, property managers and building owners. With offices in Detroit and Chattanooga, and experience throughout the US, Canada, and Central America, our focus is on customer success, to understand your needs, recommend optimal solutions and deliver quality workmanship on every project. It’s pretty simple. We’ll make your priorities ours – then roll up our sleeves and get them done on time and within budget.
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W.J. O'Neil Company Questions
The W.J. O'Neil Company annual revenue was $40.7 million in 2026.
John O'Neil is the President of W.J. O'Neil Company.
67 people are employed at W.J. O'Neil Company.
W.J. O'Neil Company is based in Livonia, Michigan.
The NAICS codes for W.J. O'Neil Company are [238220, 2382, 238, 23822, 23].
The SIC codes for W.J. O'Neil Company are [171, 17].
Top W.J. O'Neil Company Employees
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John O'Neil
President at W.J. O'Neil Company
Detroit, MI, US13 -
23
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Steve Benaske
Senior Mechanical Engineer at W.J. O'Neil Company
Livonia, MI, US21 -
11
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Robert Gazda
General Manager at W.J. O'Neil Company
Chattanooga, TN, US25+ -
Jason Harden
CAD and BIM Manager at W.J. O'Neil Company
Detroit, MI, US35+ -
1
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