Insights

Established Market Presence With over a century of experience since 1920 and a substantial revenue range of 100M to 250M, Grunau Company demonstrates a strong and enduring presence in the specialty trade contracting industry, indicating reliable revenue streams and potential for expanded service needs.

Regional Expansion Opportunities The company's primary operations in southeastern Wisconsin, along with its sister offices across several states, suggest ongoing regional growth and potential to expand service offerings or introduce new solutions to a broader geographic market.

Diversified Mechanical Services Offering a wide range of mechanical systems including HVAC, plumbing, medical gas, process piping, electrical, and refrigeration positions Grunau as a versatile contractor, opening opportunities for cross-selling innovative or integrated systems through technological upgrades or maintenance services.

Tech-Enabled Operations Utilization of modern digital tools like cloudflare CDN, Yoast SEO, and Google Tag Manager indicates an openness to technology adoption, which could facilitate digital solutions, project management software, or IoT integration in their service offerings.

Potential for Sustainability Initiatives Given the company's long-standing reputation for excellence and broad service scope, there exists a potential to develop or promote sustainable and energy-efficient solutions, aligning with industry trends towards greener building and facility management practices.

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

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%

Grunau Company Email Formats

Example

Percentage

First.Last@grunau.com

John.Doe@grunau.com

89%

FirstL@grunau.com

JohnD@grunau.com

F.Last@grunau.com

J.Doe@grunau.com

F_Last@grunau.com

J_Doe@grunau.com

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 December 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 December 2025, Grunau Company has approximately 285 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 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

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 285 employees.

Q: What technology does Grunau Company use?

Grunau Company's tech stack includes Twemoji, Microsoft, SAP Maintenance, Repair, and Overhaul, Lightbox, X-Content-Type-Options.

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.

Insights

Similar companies to Grunau Company

Interstate Fire Protection

TEAM Industries

Comfort Systems USA

American Fire Systems

ENGIE

Grunau Company Tech Stack

Media & News

Grunau Company's Email Address Formats