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

O.C. McDonald Co. has employees across 2 departments including Administrative, Customer Success.

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.

O.C. McDonald Co. Employee Directory

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

O.C. McDonald Co.'s key employees include: President: M. M..

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
34

United States Of America
34

O.C. McDonald Co.'s Leadership

M. M.
President
Mobile Phone
Email
R. S.
Vice President
Mobile Phone
Email
D. H.
Shipping And Receiving Manager
Mobile Phone
Email
E. S.
Manager
Mobile Phone
Email
J. M.
Administrative Office Assistant
Mobile Phone
Email
T. D.
Customer Service Representative
Mobile Phone
Email
B. R.
Mobile Phone
Email
D. W.
Mobile Phone
Email

O.C. McDonald Co. Employee Metrics

100%

50%

0%

2026

2025

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

Contact profiles from O.C. McDonald Co.

Name

Title

Contact Info

Location

Last Update

M. M.
President
Mobile Phone
Email
United States
Apr 14, 2026
R. S.
Vice President
Mobile Phone
Email
UNITED STATES
Oct 17, 2024
D. H.
Shipping And Receiving Manager
Mobile Phone
Email
UNITED STATES
Mar 08, 2023
E. S.
Manager
Mobile Phone
Email
UNITED STATES
May 16, 2025
J. M.
Administrative Office Assistant
Mobile Phone
Email
Apr 24, 2025
T. D.
Customer Service Representative
Mobile Phone
Email
UNITED STATES
Mar 08, 2023
B. R.
Mobile Phone
Email
UNITED STATES
Mar 08, 2023
D. W.
Mobile Phone
Email
UNITED STATES
Mar 08, 2023
J. M.
Mobile Phone
Email
UNITED STATES
Mar 08, 2023
K. M.
Mobile Phone
Email
UNITED STATES
Mar 08, 2023

Frequently Asked Questions

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

O.C. McDonald Co. was founded in 1906 operates in the Construction industry. The company's main headquarters is located in 1150 West San Carlos Street San Jose, California 95126 United States; 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 June 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 June 2026, O.C. McDonald Co.'s key employees include:

President: M. M.
Vice President: R. S.
Shipping And Receiving Manager: D. H.
Manager: E. S.
Administrative Office Assistant: J. M.

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O.C. McDonald Co. Employee Directory

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