Insights

Regional Market Reach Grunau Company serves a broad geographic area within southeastern Wisconsin extending into Madison and Green Bay, presenting opportunities for regional expansion or partnership with local contractors to increase project scope and customer footprint.

Diverse Service Portfolio With capabilities spanning HVAC, plumbing, medical gas, refrigeration, electrical, and underground utilities, there are cross-selling opportunities and avenues to offer bundled solutions to clients with multiple infrastructure needs.

Technology Adoption Utilization of modern digital tools such as Cloudflare, Microsoft Dynamics, and SEO platforms indicates openness to technological enhancements, paving the way for digital marketing, CRM-driven outreach, and data-driven sales strategies.

Financial Scale With annual revenues between $100M and $250M, Grunau is positioned as a significant regional player, allowing targeted enterprise-level sales approaches and high-value contract discussions with large commercial or industrial clients.

Industry Presence Operating since 1920 and maintaining a strong reputation for excellence, Grunau presents an opportunity to align with a well-established contractor known for reliability, which can be leveraged in marketing high-end and long-term projects.

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Grunau Company Tech Stack

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

Cloudflare CDN
Content Delivery Network
cdnjs
Content Delivery Network
CookieYes
Cookie Compliance
Cloudflare DNS
Domain Name Services
Microsoft Dynamics
Enterprise Resource Planning
Yoast SEO
Search Engines
Bootstrap
UI Frameworks
Piwik PRO Core
Web Analytics

Media & News

Grunau Company's Email Address Formats

Grunau Company uses at least 2 format(s):

Grunau Company Email Formats	Example	Percentage
First.Last@grunau.us	John.Doe@grunau.us	85%
Last@grunau.us	Doe@grunau.us	15%
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%

Frequently Asked Questions

Where is Grunau Company's headquarters located?

Grunau Company's main headquarters is located at 1100 West Anderson Court Oak Creek, Wisconsin 53154 United States. The company has employees across 2 continents, including North AmericaAsia.

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.

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 May 2026, Grunau Company has approximately 282 employees across 2 continents, including North AmericaAsia. Key team members include Chief Executive Officer: S. M.Cfo: J. H.Cfo: J. H.. 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 Cloudflare CDNcdnjsCookieYesCloudflare DNSMicrosoft DynamicsYoast SEOBootstrapPiwik PRO Core.

What is Grunau Company's email format?

Grunau Company's email format typically follows the pattern of First.Last@grunau.us. 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 282 employees.

Q: What technology does Grunau Company use?

Grunau Company's tech stack includes Microsoft Outlook, X-Content-Type-Options, Google Fonts API, Open Graph, CookieYes.

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 headquartered in the greater Milwaukee area which specializes in any size commercial or industrial project in a variety of industries. The majority of our work is completed throughout southeastern Wisconsin as far west as Madison and as far north as Green Bay, WI. 

Our mechanical systems capabilities include HVAC (heating, ventilation, and air conditioning), plumbing, medical gas, process piping, electrical, refrigeration, and underground site utilities. Grunau completes installations, inspections, maintenance, and service 24/7 for our customers.  We’ve been the Benchmark of Excellence in our field since 1920.

Our sister operations, Grunau Fire Protection, has offices in Oak Creek, WI; Kenosha, WI (Flannery FP); Indianapolis, IN; Youngstown, OH; Pittsburgh, PA (Moon Township); and Orlando, FL.

Company Overview

Headquarters: 1100 West Anderson Court Oak Creek, Wisconsin 53154 United States
Phone number: +1-414-216-****
Website: grunau.com
NAICS Code: 238 - Specialty Trade Contractors
Founded: 1920
Employees: 201-500