OC McDonald

What OC McDonald does

O.C. McDonald Company is a full-service mechanical construction firm headquartered in San Jose, California, that has been continuously operating since its founding in 1906 by Oren Charles McDonald. The company delivers HVAC, plumbing, process piping, and integrated design-build engineering services to commercial, industrial, and institutional clients across Northern California. Its most visible customer relationships are with major Silicon Valley technology operators — Apple, Google, and Tesla — alongside Stanford University and regional healthcare facilities, indicating a focus on complex, high-specification environments such as tech campuses, university buildings, and hospitals.

The firm operates with union craft professionals and combines what it terms 'advanced design technologies' with traditional mechanical contracting expertise, delivering projects under one integrated provider rather than splitting scopes across specialty trades. Its go-to-market is enterprise field sales: direct engagement with owners, general contractors, and developers on large-scale bids and design-build pursuits rather than distribution or marketing-driven lead generation. Pricing is project-based and not publicly disclosed, consistent with custom B2B construction services.

O.C. McDonald is a private, family-owned business currently in its fifth generation of family stewardship under Matt McDonald. With a reported headcount band of 101–250 and no disclosed external investors, ownership remains concentrated in the founding family. The company celebrated its 120th year of operation and continues to anchor its competitive positioning on institutional longevity, multi-generational relationships with marquee Silicon Valley clients, and full-scope mechanical capability under a single contracting entity.

Name

OC McDonald

Legal name

O.C. McDonald Company

Website

https://ocmcdonald.com

Company type

Private

Founded year

1906

Operating status

Operating

Headcount range

51–100 employees

Short description

O.C. McDonald is a fifth-generation, family-owned mechanical contractor in San Jose, California providing HVAC, plumbing, process piping, and design-build engineering services to enterprise clients in Northern California, including Apple, Google, Tesla, Stanford University, and regional healthcare facilities.

Ownership category

akta.pro rank

Product category

Mechanical Contracting Services

SIC

Electrical Industrial Apparatus (3620)

akta.pro industry

PRIMARYIMAGAGAK

Process Control & Automation Electronics Manufacturing Services (PLCs, I/O, DCS/SCADA hardware)

Industrials, Manufacturing & Construction/Electrical Equipment & Industrial Electronics/Industrial Electronics Manufacturing Services (EMS/ODM for industrial electronics)

Keywords

• Mechanical contracting services
• HVAC installation
• Plumbing services
• Process piping systems
• Building automation systems

Headquarters

HQ city

San Jose

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Supply Chain, Technology or R&D, Infrastructure, Marketing or Sales

Revenue model

1. Mechanical Contracting Services: Project-based revenue from installation of HVAC, plumbing, process piping, and design-build engineering services for commercial and industrial clients. Revenue is generated through one-time project fees for new installations, retrofits, and ongoing maintenance contracts.

Go-to-market motion1 record

Distribution channels1 record

Core offering

O.C. McDonald is a full-service mechanical contractor that designs, installs, and maintains HVAC, plumbing, process piping, and direct digital control/building automation systems for commercial, industrial, and institutional facilities in Northern California. It also delivers integrated design-build engineering services combining design and implementation for new construction, retrofits, and ongoing service contracts.

Product overview

O.C. McDonald is a full-service mechanical contracting company offering an integrated portfolio of construction and engineering services. The company provides HVAC, plumbing, process piping, and design-build engineering as core service offerings. These services are delivered through advanced design technologies and union craft professionals, serving major technology clients including Apple, Google, Tesla, Stanford University, and healthcare facilities across Northern California.

Differentiator

Problem solved

Functional benefit

Products and services

• HVAC Services Heating, ventilation, and air conditioning installation and maintenance services for commercial and industrial facilities, including direct digital control and building automation systems.
• Plumbing Services Plumbing installation and maintenance for commercial and industrial buildings.
• Process Piping Specialized piping systems installation for industrial and manufacturing processes.
• Design-Build Engineering Services Integrated engineering and construction services combining design and implementation for mechanical systems.

Named customers5 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Scale indicators1 record

Recent moves4 records

Direct peers

• Limbach Holdings: National mechanical contractor focused on design-build HVAC, plumbing, and building automation for commercial and institutional clients — comparable integrated service model.
• Pan-Pacific Mechanical: Northern California mechanical contractor with strong presence in the Bay Area tech and commercial markets — the most direct regional peer given shared geography and customer types.
• EMCOR Group: National mechanical and electrical construction services provider with overlapping HVAC, plumbing, and process-systems offerings; comparable as a multi-trade mechanical contractor serving enterprise and industrial clients.
• Southland Industries: Design-build mechanical contractor serving commercial, industrial, and institutional clients across the Western U.S., with comparable integrated engineering and construction capabilities.
• ACCO Engineered Systems: West Coast-based mechanical contractor specializing in HVAC, plumbing, and process piping for commercial, industrial, and institutional facilities — closely comparable in service mix and regional footprint.

Broad incumbents

• Carrier Global: HVAC, refrigeration, and building automation incumbent serving commercial and industrial customers globally — overlaps in mechanical services and controls integration but operates at vastly larger scale.
• Trane Technologies: Global HVAC equipment and services giant with commercial mechanical contracting and building automation services — overlapping customer set but with a much larger equipment and services portfolio.
• API Group: Diversified safety, specialty, and industrial services platform with mechanical contracting overlap; broader portfolio with less mechanical-services concentration.
• Johnson Controls: Building automation, HVAC, and mechanical services global incumbent; overlaps with O.C. McDonald in building automation and DDC systems integration but spans much broader geographies and product lines.
• Comfort Systems USA: Large national mechanical contractor with HVAC, plumbing, and piping services across the U.S.; broader scale and footprint than O.C. McDonald but overlapping core service lines.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key risks6 records

Key highlights6 records

Customer concentration

• Xx.com/ocmcdonaldsj
• LinkedInlinkedin.com/company/o.c.-mcdonald-co.

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about OC McDonald