> Enrich.chat gives AI agents verified work emails and mobiles. To use it from an agent, read https://enrich.chat/agents.md . This is the Markdown version of https://enrich.chat/company/day-and-zimmermann/ # Day & Zimmermann A construction organization with 25,000 to 50,000 employees. Where it sits among its peers, the technology it runs and how to reach its people. By Enrich.chat Editorial. Updated October 21, 2026. **Short answer:** Day & Zimmermann (dayzim.com) is a construction organization with 25,000 to 50,000 employees. Its public technology footprint includes Microsoft 365, Microsoft Outlook, Facebook Login and Salesforce. ## How big is Day & Zimmermann? Day & Zimmermann has 25,000 to 50,000 employees. Among the construction firms on this site it sits among the largest. Each dot in the figure is one of its peers, placed by size; the orange dot is Day & Zimmermann. **Figure: Where Day & Zimmermann sits among construction firms.** A strip of dots, one for each of 120 peers in construction, spread from 2,000 to 2,000,000 employees on a log scale. Day & Zimmermann is highlighted and falls in the 25,000 to 50,000 employees range among the largest. *Peers in construction placed by employee count on a log scale. Sizes are rounded ranges from public profiles.* Headcount on public company profiles is rounded and moves as a company hires, so use the range as a guide, not as a payroll figure. ## Where is Day & Zimmermann headquartered? Day & Zimmermann is headquartered in Philadelphia, Pennsylvania. [Companies in Pennsylvania](https://enrich.chat/companies-in/pennsylvania/) ## What industry is Day & Zimmermann in? Day & Zimmermann works in [construction](https://enrich.chat/industries/construction/). This group covers general contractors, specialty trades and builders that put up and renovate buildings and infrastructure. Closest matches on this site: [Kiewit](https://enrich.chat/company/kiewit/), [Bouygues Construction](https://enrich.chat/company/bouygues-construction/), [Bechtel](https://enrich.chat/company/bechtel/), [Burns & McDonnell](https://enrich.chat/company/burns-and-mcdonnell/), [Leighton Asia](https://enrich.chat/company/leighton-asia/) and [VINCI](https://enrich.chat/company/vinci/). ## What technology does Day & Zimmermann use? We detect 20 tools on Day & Zimmermann's public footprint across 11 categories, for example Salesforce for marketing automation and crm, SAP SuccessFactors for hr and recruiting and Facebook Login for identity and authentication. The figure counts the tools in each category; the groups below name them and link to the companies that use each one. **Figure: Tools detected at Day & Zimmermann, by category.** A bar chart of how many tools were detected at Day & Zimmermann in each category: Marketing automation and CRM 2, Identity and authentication 2, Email and productivity 2, Analytics and tracking 2, Video and media 2, Social and widgets 2, Fonts, maps and embeds 2. *Tools detected on the public footprint of Day & Zimmermann, by category.* ### Marketing automation and CRM [Salesforce](https://enrich.chat/companies-using/salesforce/)[HubSpot](https://enrich.chat/companies-using/hubspot/) ### HR and recruiting [SAP SuccessFactors](https://enrich.chat/companies-using/successfactors/) ### Identity and authentication [Facebook Login](https://enrich.chat/companies-using/facebook-login/)[LinkedIn Login](https://enrich.chat/companies-using/linkedin-login/) ### Developer and DevOps tools [ServiceNow](https://enrich.chat/companies-using/servicenow/) ### Email and productivity [Microsoft 365](https://enrich.chat/companies-using/microsoft-365/)[Microsoft Outlook](https://enrich.chat/companies-using/microsoft-outlook/) ### Website platforms and CMS [WordPress (self-hosted)](https://enrich.chat/companies-using/wordpress-org/) ### Analytics and tracking [Google Tag Manager](https://enrich.chat/companies-using/google-tag-manager/)[Google Analytics](https://enrich.chat/companies-using/google-analytics/) ### Video and media [Vimeo](https://enrich.chat/companies-using/vimeo/)[YouTube](https://enrich.chat/companies-using/youtube/) ### Social and widgets [Facebook Widget](https://enrich.chat/companies-using/facebook-widget/)[LinkedIn Widget](https://enrich.chat/companies-using/linkedin-widget/) ### Fonts, maps and embeds [Typekit (Adobe Fonts)](https://enrich.chat/companies-using/typekit/)[Google Custom Search](https://enrich.chat/companies-using/google-custom-search/) Tools change as companies adopt and drop them. Check a single company at any time with the free [tech stack lookup](https://enrich.chat/tools/tech-stack-lookup/). ## Which companies are most like Day & Zimmermann? These are the closest matches among the construction firms on this site. Each is compared on the business tools it runs (a rarer tool says more than a common one), how close its size is and, when both are known, where it is based. The second column says why it matched and gives its size range. | Company | Why it matches | | --- | --- | | [Kiewit](https://enrich.chat/company/kiewit/) | Shares Salesforce, SAP SuccessFactors and ServiceNow; same size range. 25,000 to 50,000 employees | | [Bouygues Construction](https://enrich.chat/company/bouygues-construction/) | Shares Salesforce, SAP SuccessFactors and ServiceNow; same size range. 25,000 to 50,000 employees | | [Bechtel](https://enrich.chat/company/bechtel/) | Shares SAP SuccessFactors and ServiceNow; same size range. 25,000 to 50,000 employees | | [Burns & McDonnell](https://enrich.chat/company/burns-and-mcdonnell/) | Shares HubSpot and ServiceNow; a smaller company. 10,000 to 25,000 employees | | [Leighton Asia](https://enrich.chat/company/leighton-asia/) | Shares Salesforce and ServiceNow; a smaller company. 10,000 to 25,000 employees | | [VINCI](https://enrich.chat/company/vinci/) | Shares Salesforce and LinkedIn Login; a larger company. 100,000+ employees | | [GMR Group](https://enrich.chat/company/gmr-group/) | Shares Salesforce and SAP SuccessFactors; a smaller company. 10,000 to 25,000 employees | | [PCL Construction](https://enrich.chat/company/pcl-construction/) | Shares Salesforce and SAP SuccessFactors; a smaller company. 10,000 to 25,000 employees | To build a longer list of accounts like Day & Zimmermann, with the people who run their software, ask your AI agent: ```text Use www.enrich.chat to find construction firms that run Salesforce and SAP SuccessFactors, like Day & Zimmermann, and the project executives, operations directors and estimating leaders at each, with titles and verified work emails ``` ## How do I find the right people at Day & Zimmermann? Start from the website, dayzim.com. Enter it in the free email finder with a name, or ask your AI agent for the people in the roles you sell to, such as project executives, operations directors and estimating leaders. ```text Use www.enrich.chat to find the project executives, operations directors and estimating leaders at dayzim.com, with titles and verified work emails ``` Staff addresses follow a known pattern: see the [Day & Zimmermann email format](https://enrich.chat/email-format/day-and-zimmermann/). ## Which other companies use the same tools? See who else runs the tools Day & Zimmermann uses: [Microsoft 365](https://enrich.chat/companies-using/microsoft-365/)[Microsoft Outlook](https://enrich.chat/companies-using/microsoft-outlook/)[Vimeo](https://enrich.chat/companies-using/vimeo/)[Facebook Login](https://enrich.chat/companies-using/facebook-login/)[YouTube](https://enrich.chat/companies-using/youtube/)[Facebook Widget](https://enrich.chat/companies-using/facebook-widget/) ## Frequently asked questions ### How many employees does Day & Zimmermann have? Day & Zimmermann is in the 25,000 to 50,000 employees range on its public company profile. Headcounts are rounded and change as companies hire, so treat the range as a guide. ### What industry is Day & Zimmermann in? Day & Zimmermann works in construction. This group covers general contractors, specialty trades and builders that put up and renovate buildings and infrastructure. ### What technology does Day & Zimmermann use? Tools detected on its public footprint include Microsoft 365, Microsoft Outlook, Facebook Login and Salesforce, across 11 categories. A detected tool shows it was seen, not what Day & Zimmermann pays for it. ### Where is Day & Zimmermann headquartered? Day & Zimmermann is headquartered in Philadelphia, Pennsylvania. ### What companies are similar to Day & Zimmermann? The closest matches on this site are Kiewit, Bouygues Construction and Bechtel. They are compared on the business tools they run, their size and where they are based; the profile above lists the reasons. ### What is the website of Day & Zimmermann? Day & Zimmermann's website is dayzim.com. Staff email usually uses a domain like it, so check the pattern with the free email format finder before you write to anyone. ## Try this prompt Find people at Day & Zimmermann ```text Use www.enrich.chat to find the project executives, operations directors and estimating leaders at dayzim.com, with titles and verified work emails ``` ## Related - [Companies using a technology](https://enrich.chat/companies-using/) - [Kiewit](https://enrich.chat/company/kiewit/) - [Bouygues Construction](https://enrich.chat/company/bouygues-construction/) - [Bechtel](https://enrich.chat/company/bechtel/) - [Burns & McDonnell](https://enrich.chat/company/burns-and-mcdonnell/) - [Leighton Asia](https://enrich.chat/company/leighton-asia/) - [VINCI](https://enrich.chat/company/vinci/) - [GMR Group](https://enrich.chat/company/gmr-group/) - [PCL Construction](https://enrich.chat/company/pcl-construction/) - [Tech stack lookup](https://enrich.chat/tools/tech-stack-lookup/)