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 remained stable from approximately 13 to 13 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

Over A Century of Quality Service, Repair & Innovative Installation

In 1906, Oren Charles McDonald founded O.C. McDonald Company in San Jose, California. From the outset, O.C. McDonald was one of the foremost plumbing, process piping and HVAC service providers in the Bay Area, installing the first air conditioning system in the city. Since our inception, O.C. McDonald Company has some of the most complicated installations in the valley under our belt.

Over a century later, the founder's great grandson, Jim McDonald, has upheld the utmost level of quality workmanship, traditional values and technical innovation upon which O.C. McDonald was established.

We Believe in exceptional customer service, unwavering quality, absolute reliability, and continual innovation, on time and on budget. You can depend upon O.C. McDonald for all of your plumbing and HVAC service, repair and installation needs.

Find O.C. McDonald Co. employees' phone numbers or email addresses

O.C. McDonald Co. Global Highlights

North America
36

United States Of America
36

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
Mar 16, 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 32 employees as of March 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 March 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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