Insights

Regional Growth Grunau operates primarily in southeastern Wisconsin with expansion reach to Madison and Green Bay, presenting cross-sell opportunities with sister Grunau Fire Protection offices in multiple states and potential enterprise-wide mechanical and fire protection suites for regional clients.

End-to-End Capabilities Full spectrum mechanical systems services (HVAC, plumbing, medical gas, process piping, electrical, refrigeration, underground utilities) enable selling integrated solutions and maintenance packages to customers seeking single-vendor convenience and 24/7 service.

Sustainability Readiness Diverse piping and HVAC capabilities can support energy efficiency retrofits and green building projects, offering upsell opportunities for optimization, LEED-related work, and ongoing maintenance contracts.

Financial Scale With annual revenue in the near mid-market range and a sizable employee base, Grunau is positioned to pursue mid-to-large commercial/industrial projects and multi-site deployments, appealing to corporate facilities and construction management firms.

Digital & Operations Existing tech stack (Cloudflare, MySQL, Microsoft Dynamics, SEO tooling) supports data-driven sales, CRM integration, and targeted marketing to facilities managers, engineers, and procurement leads, enabling more efficient lead qualification and project scoping.

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Grunau Company Tech Stack

Grunau Company uses 8 technology products and services including iCIMS, Cloudflare CDN, Cloudflare, and more. Explore Grunau Company's tech stack below.

iCIMS
Applicant Tracking Systems
Cloudflare CDN
Content Delivery Network
Cloudflare
Content Management System
WordPress
Content Management System
CookieYes
Cookie Compliance
Microsoft 365
Email
Microsoft Dynamics
Enterprise Resource Planning
Piwik PRO Core
Web Analytics

Grunau Company's Email Address Formats

Grunau Company uses at least 6 email formats:

Grunau Company Email Formats	Example	Percentage
First.Last@grunau.com	John.Doe@grunau.com	88%
FirstL@grunau.com	JohnD@grunau.com	7%
F.Last@grunau.com	J.Doe@grunau.com	3%
F_Last@grunau.com	J_Doe@grunau.com	2%
First.Last@grunau.us	John.Doe@grunau.us	85%
Last@grunau.us	Doe@grunau.us	15%

Frequently Asked Questions

What is Grunau Company's phone number?

You can contact Grunau Company's main corporate office by phone at

+1-414-216-****

. For more prospecting data, LeadIQ has access to up-to-date and accurate contact information within our platform. Find, capture, and sync contact data to your CRM and sales tools in one click.

What is Grunau Company's official website and social media links?

Grunau Company's official website is grunau.com and has social profiles on LinkedIn.

How much revenue does Grunau Company generate?

As of August 2026, Grunau Company's annual revenue is estimated to be $100M - $250M.

What is Grunau Company's NAICS code?

Grunau Company's NAICS code is 238 - Specialty Trade Contractors.

How many employees does Grunau Company have currently?

As of August 2026, Grunau Company has approximately 278 employees across 1 continents, including North America. Key team members include Chief Executive Officer: S. M., Chief Operating Officer Strategic Pro: G. H. and President: D. M. Explore Grunau Company's employee directory with LeadIQ.

What industry does Grunau Company belong to?

Grunau Company operates in the Specialty Trade Contractors industry.

What technology does Grunau Company use?

Grunau Company's tech stack includes iCIMS, Cloudflare CDN, Cloudflare, WordPress, CookieYes, Microsoft 365, Microsoft Dynamics and Piwik PRO Core.

What is Grunau Company's email format?

Grunau Company's email format typically follows the pattern of First.Last@grunau.com. Find more Grunau Company email formats with LeadIQ.

When was Grunau Company founded?

Grunau Company was founded in 1920.

Grunau Company

Q: What is Grunau Company's official website and social media links?

Grunau Company's official website is grunau.com. Grunau Company has social profiles on LinkedIn.

Q: How many employees does Grunau Company have currently?

Grunau Company has approximately 278 employees.

Q: What technology does Grunau Company use?

Grunau Company's tech stack includes Piwik PRO Core, Modernizr, Microsoft Outlook, MySQL, Twemoji.

Q: What is Grunau Company's NAICS code?

Grunau Company's NAICS code is 238 (Specialty Trade Contractors).

Specialty Trade ContractorsWisconsin, United States201-500 Employees

Grunau Company is a mechanical systems contractor based in the greater Milwaukee area, with its headquarters in Oak Creek, Wisconsin. It serves commercial and industrial projects of varying size across southeastern Wisconsin, extending west to Madison and north to Green Bay. The company provides a range of mechanical system capabilities, including HVAC, plumbing, medical gas, process piping, electrical, refrigeration, and underground site utilities, and it performs installations, inspections, maintenance, and 24/7 service.

Grunau has a long history dating back to 1920, reflecting a longstanding presence in the regional market. Its sister operation, Grunau Fire Protection, operates from multiple locations including Oak Creek, WI; Kenosha, WI (Flannery FP); Indianapolis, IN; Youngstown, OH; Moon Township, PA; and Orlando, FL.