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Making a Difference through Environmental Responsibility

Day & Zimmermann is committed to environmental responsibility. We believe fulfilling our environmental goals will lead to short and long-term benefits for shareholders, customers, employees and the communities in which we live and conduct business. We strive to make a difference in the world and believe environmental management and preservation is one of the most important ways we can have an impact. By championing a sustainability mindset, we gain competitive advantage, delight our customers and protect our planet.

“Continuing to focus on a more sustainable environment clearly provides us with a higher purpose and is one of the most important ways Day & Zimmermann can have an impact on helping future generations thrive.”
Hal Yoh, Chairman & CEO, Day & Zimmermann

Environmental, Social and Governance (ESG) report

As a company who has been around for more than 120 years, we’ve seen many changes - none more important than a focus on helping our planet. While we have been working at it for years, we are pleased to report on our current efforts with our first Environmental, Social and Governance (ESG) report. 

We know how important it is to shed light on all the ways that we can work together to build a brighter future for our company, employees, customers, communities and the world.

View the report here



Experienced Solar Construction Management Team

D&Z’s team has nearly 1 GW of managed solar construction project experience, including multiple solar projects up to 150 MW. Our team holds NABCEP certifications, and we continue to invest in training and development for our growing roster of experienced solar installation professionals.

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Reaffirming Our Commitment to Sustainability

A Business Roundtable report, highlights the sustainability record of more than 150 companies, including Day & Zimmermann’s CEO Letter. The report details our achievements in creating a more sustainable world and a better quality of life for all Americans. This impressive report features hundreds of leading companies.

Business Roundtable Report Highlights Day & Zimmermann’s Sustainability Achievements


Earth Day

Day & Zimmermann is committed to environmental responsibility as we strive to make a difference in our world. One of the most important ways we believe can have an impact is through careful environmental management and preservation. Mason & Hanger continues to be a leader in these efforts by supporting their clients with sustainable designs and building materials to create high performing facilities. As we celebrate Earth Day, let’s take a look at the many ways D&Z is protecting our planet.

Promoting Green Suppliers

Day & Zimmermann’s procurement of materials, goods and services is extensive and globally far-reaching. This presents a significant opportunity to support our environmental priorities and objectives by instituting purchasing policies that give preference to environmentally friendly products and environmentally responsible suppliers and partners. Our efforts in this area focus on embedding environmental performance criteria into our supplier selection and evaluation processes, and working with existing suppliers to develop more environmentally friendly product and service options. For more information on how to become a supplier to Day & Zimmermann, visit the Suppliers page.