About Us

The Z Group, established in 1995, is a leading manufacturers’ representative and consulting firm, specializing in architectural openings, commercial hardware and specialty building products.

The Z Group provides product knowledge, application expertise and personalized customer service for today’s fast paced construction environment. In a market characterized by rapid change, growing complexity and increasing competition, The Z Group strives to provide the knowledge and relationships needed to ensure the right product for the right application at the right time.

We believe in cultivating long-standing, mutually-beneficial relationships, built on communication, integrity and trust among our associates, clients and principals.

The firm’s offices cover the areas of Arizona, Southern California, Southern Nevada, New Mexico and El Paso, Texas.

Dennis Zanrosso CDT CPMR

Joined The Z Group: 1995
Industry since: 1979
Education: University of Nebraska-Lincoln,
Arizona State University

Donald Zanrosso CSI
Vice President Sales
Joined The Z Group: 1996
Industry since: 1977
Education: St. Mary’s College of California

Kit Knudsen
Office Manager
Joined The Z Group: 2008
Industry since: 2007
Education: Copenhagen Business School

Danielle Roberts
Customer Service | Marketing
Joined The Z Group: 1996
Industry since: 1996
Education: California State University, Northridge

Paul Roberts
Architectural | Sales Associate
Joined The Z Group:2016
Industry since: 2016
Education: Moorpark College, Dale Carnegie
Sales Training

Gino Zanrosso
Architectural | Sales Associate
Joined The Z Group: 2017
Industry since: 2017
Education: University of California, Santa Barbara


Visit our Services page for specific ways we can help meet your needs.

The Z Group’s mission is to establish, cultivate and grow relationships within the built environment and our manufacturing partners. The agency is committed to providing seamless, responsive service and communication of essential information in the architectural opening and security industries.

The Z Group subscribes to the principle that: “We Must First Be Best, Then Be First”

Core Values are a set of beliefs that our agency and its members use as a guide for conducting business and achieving success. The Z Group is a company that believes in character, honesty, integrity, persistence and reliability of actions by all associates.

The Goals & Objective of the agency are to:

  • Establish strategic plans and actions to aggressively grow our manufacturers market share in our assigned territories.
  • Expand sales and exposure with our existing customer base.
  • Spend time where the greatest opportunities lie.
  • Take what the market will give.


The Z Group’s vision is to be the leading sales, service and marketing organization within the architectural opening and security industries. Our goals will be achieved through a dedicated and proactive approach to:

  • Teamwork
  • Communication
  • Education
  • Professionalism
  • Systems Development
  • Technical Competence


Through a focused and disciplined methodology, strong relationships with our associates, customers and principals, we will develop, grow and sustain a balanced revenue stream that will create opportunities, diversification and longevity. Our success will provide an environment and a vehicle for our members to achieve financial security, professional growth and personal goals.