Commercial and industrial mechanical contracting with in-house design, fabrication, and service.
ACCO Engineered Systems operates as a full-service mechanical contractor handling HVAC, refrigeration, plumbing, process piping, and building automation across commercial and industrial sectors. The company's tech stack is heavily weighted toward design and coordination tools—AutoCAD, Revit, Bluebeam, BIM 360, Navisworks—reflecting a design-build operating model where field execution depends on upstream engineering precision. Active hiring leans engineering (116 roles) and construction (51), with pain points centered on labor coordination, cost control, and timeline management, indicating the classic contractor challenge: translating complex designs into on-time, on-budget field delivery across dispersed teams.
ACCO Engineered Systems is a mechanical contractor serving commercial and industrial clients across California and the Southwest. Founded in 1934, the company has completed more than 250,000 projects and operates as a 100% employee-owned ESOP with approximately 5,000–10,000 employees. The business spans design, fabrication, installation, commissioning, and ongoing service for HVAC, refrigeration, plumbing, process piping, and controls. ACCO has grown through acquisition and organic expansion, absorbing firms like Sunbelt Controls, Sunbelt Electric, Smith MEP, Geo. H. Wilson, PLS Companies, and AES Industrial to broaden service offerings. The company competes on integrated delivery—combining in-house engineering, fabrication, and commissioning to reduce customer coordination burden and cost.
AutoCAD, Revit, Bluebeam, Navisworks Manage, and Autodesk BIM 360 form the core design and coordination stack. Additional tools include Microsoft Project for planning, IFS for operations management, and DynamoDB and Forge for digital workflows.
ACCO is headquartered in Pasadena, California, and primarily hires across the United States, with operational focus in California and the Southwest region.
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