Insights

Regional Expanded Reach Grunau serves southeastern Wisconsin with capacity spanning from Milwaukee to Madison and Green Bay, plus sister operations in multiple states. This suggests a potential cross-region expansion play for multi-site commercial projects and scalable service agreements beyond their core footprint.

Full-Service Mechanical Capabilities cover HVAC, plumbing, medical gas, process piping, electrical, refrigeration, and underground utilities, plus 24/7 installation, maintenance, and service. This positions Grunau for comprehensive MCC/MEP projects and long-term facility support contracts.

Sizable Customer Base Reported revenue in the range of $100M-$250M with a workforce of 201-500 employees indicates established project capacity and financial stability, enabling pursuing larger, multi-site or high-complexity bids from mid-market to enterprise clients.

Industry Benchmark Operating since 1920 and branding as the Benchmark of Excellence signals reliability and tradition, which can be leveraged to win discretionary bids, maintenance renewals, and value-based service agreements with risk-averse buyers.

Tech-Driven Operations Adoption of iCIMS, Microsoft Dynamics, 365, Cloudflare, WordPress, and analytics tools suggests mature appointment, CRM, ERP, and digital marketing processes; potential upsell for integrated ERP-driven procurement, project management, and data-enabled service optimization.

Similar companies to Grunau Company

Interstate Fire Protection
12$1M - $10M
TEAM Industries
558$250M - $500M
Comfort Systems USA
1.5K$1B - $10B
American Fire Systems
62$10M - $25M
ENGIE
72K$10B+

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 October 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 October 2026, Grunau Company has approximately 278 employees across 2 continents, including North America and Europe. 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.