About Us

The D.Z. Cook Co. was founded in 1967 by David Cook in San Francisco. We are now based in our offices in Hayward including a 25,000 square foot warehouse.

We are a manufacturer’s representative firm in the electrical market serving Northern California and Northern Nevada.

D.Z. Cook Company connects opportunities with contractors and end users with our distributor partners.


  • Product and Solution Expertise
  • Relationships with Distribution, Contractor and Engineering Partners
  • Experienced Sales Force
  • Merchandizing Specialist on our team
  • Local Inventory
  • Provide Lighting and Switchgear teams with take-off services


  • Educate Contractors on Product Innovations from our Manufacturers
  • Provide Technical Support for Proper Installation of Products
  • Educate Contractors on Time Saving Solutions
  • Connect Contractors to our Distributor Partners insuring a complete service solution
  • Cultivate Long Standing Relationships so that we create Brand Recognition for Our Manufacturers


  • Support and Engage Electrical Distribution
  • Support Electrical Contractors, OEM’s and MRO customers
  • Work with Electrical Engineers and Lighting Designers so as to Gain Specification Preference
  • Communicate Market Intelligence Back to our Manufacturers so that they can Develop Innovative Product Solutions
  • Provide Best in Class Inside Sales Support


  • Educate Distribution on Product Innovations from Our Manufacturers
  • Provide timely and accurate quotations
  • Maintain our Role as Solution Providers and Problem Solvers
  • Support Distribution with our local inventory
  • Provide Lighting and Switchgear Teams with take-off services