What departments does O.C. McDonald Co. have?

O.C. McDonald Co. has employees across 1 departments including Administrative.

What is the largest department at O.C. McDonald Co.?

The largest department at O.C. McDonald Co. is Administrative with 1 employees.

Where are O.C. McDonald Co. employees located globally?

O.C. McDonald Co. has employees across 1 continents and 1 countries including United States Of America.

How has O.C. McDonald Co.'s team size changed over time?

O.C. McDonald Co.'s team has grown from approximately 13 to 14 employees based on available data.

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O.C. McDonald Co. Employee Directory

ConstructionCalifornia, United States11-50 Employees

O.C. McDonald Co. is a San Jose, California-based construction firm specializing in plumbing, process piping, and HVAC services, including maintenance, repair, and installation. Founded in 1906 by Oren Charles McDonald, the company has a long history of completing demanding installations in the Bay Area, including introducing air conditioning in the city. The business remains family-led, with management passed to the founder's great grandson, Jim McDonald, and operates as a small- to mid-sized contractor that emphasizes workmanship and technical innovation.

Its clients are organizations seeking plumbing, piping, and HVAC service, repair, and installation across the Bay Area, with projects that require reliability and quality workmanship. Within the construction industry, the firm is recognized for its experience with complex installations and sustained performance.

O.C. McDonald Co. Global Highlights

North America
35

United States Of America
35

O.C. McDonald Co.'s Leadership

J. M.
Administrative Office Assistant
Mobile Phone
Email

O.C. McDonald Co. Employee Metrics

100%

50%

2026

2025

Accounting
Business
Community & Social Services
Entrepreneurship
Program & Project Management
Other

Contact profiles from O.C. McDonald Co.

Name

Title

Contact

Location

Last Update

J. M.
Administrative Office Assistant
Mobile Phone
Email
Apr 24, 2025

Frequently Asked Questions

What is O.C. McDonald Co. known for?

O.C. McDonald Co. was founded in 1906 operates in the Construction industry; you can contact the main corporate office by phone at

+1-408-295-****

. Explore O.C. McDonald Co.'s company overview page for more information.

What is O.C. McDonald Co.'s most common email format?

O.C. McDonald Co. employees' email format typically follows the pattern of . Trying to find reliable and up-to-date employee contact data? Find more O.C. McDonald Co. email formats with LeadIQ.

How many employees does O.C. McDonald Co. have currently?

O.C. McDonald Co. has approximately 33 employees as of July 2026. These team members are located across 1 continents, including North America.

Who are O.C. McDonald Co.'s key employees and leadership?

As of July 2026, O.C. McDonald Co.'s key employees include:

Administrative Office Assistant: J. M.

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O.C. McDonald Co. Employee Directory

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