Insights

Regional Market Presence Grunau Company has a strong regional footprint in southeastern Wisconsin, extending work from Milwaukee to Madison and Green Bay, indicating opportunities to expand services or establish partnerships within these areas to enhance market penetration.

Diverse Service Portfolio With expertise in HVAC, plumbing, medical gas, process piping, electrical, refrigeration, and underground utilities, Grunau presents cross-selling opportunities for integrated building systems packages and maintenance contracts across various industries.

Established Industry Leader Operating since 1920 and maintaining the benchmark of excellence, Grunau is positioned as a trusted provider, opening avenues for premium service offerings, project management, and long-term service agreements to clients seeking experienced contractors.

Digital Engagement Utilizing modern tech stacks such as Cloudflare, Yoast SEO, and Google Tag Manager, Grunau demonstrates a focus on digital presence and analytics, which could be leveraged to introduce advanced predictive maintenance or IoT-driven solutions for their existing infrastructure projects.

Financial and Operational Scale With revenues estimated between $100M and $250M and a sizeable workforce, Grunau is a substantial player that may be receptive to large-scale projects and custom-engineered solutions, as well as partnerships with technology providers seeking to deploy large industrial systems.

Similar companies to Grunau Company

Grunau Company Tech Stack

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

Cloudflare CDN
Content Delivery Network
cdnjs
Content Delivery Network
Cloudflare
Content Management System
CookieYes
Cookie Compliance
Twemoji
Font Scripts
Yoast SEO
Search Engines
Google Tag Manager
Tag Management
Bootstrap
UI Frameworks

Media & News

Grunau Company's Email Address Formats

Grunau Company uses at least 1 format(s):

Grunau Company Email Formats	Example	Percentage
First.Last@grunau.com	John.Doe@grunau.com	89%
FirstL@grunau.com	JohnD@grunau.com	6%
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 W Anderson Court, Oak Creek, WI 53154, US. 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.

How much revenue does Grunau Company generate?

As of October 2025, Grunau Company's annual revenue is estimated to be $110M.

What is Grunau Company's SIC code NAICS code?

Grunau Company's SIC code is 7389 - Business Services, Not Elsewhere Classified NAICS code is 238 - Specialty Trade Contractors.

How many employees does Grunau Company have currently?

As of October 2025, Grunau Company has approximately 288 employees across 2 continents, including North AmericaAsia. Key team members include Chief Executive Officer: S. M.Chief Operating Officer Strategic Pro: G. H.Vice President / Industrial Group: M. G.. 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 CDNcdnjsCloudflareCookieYesTwemojiYoast SEOGoogle Tag ManagerBootstrap.

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

Specialty Trade ContractorsUnited 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.