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Insights

Market Positioning J.M. Brennan serves a diverse client base across industrial, commercial, and healthcare sectors in Southern Wisconsin, indicating ongoing opportunities to expand healthcare and industrial project collaborations.

Technological Engagement The company's participation in industry events like Stratus Innovate 2025 and sharing insights on fire protection technology showcases their commitment to innovation, presenting opportunities for technology upgrades and advanced system integrations.

Sustainable Focus Offering sustainable design and high-performance HVAC solutions suggests a strong alignment with increasing demand for eco-friendly building systems, ideal for targeting environmentally conscious clients.

Growth Potential With revenue estimated between 100M and 250M and a skilled workforce of over 500 specialists, J.M. Brennan presents potential avenues for expanding service offerings or targeting larger infrastructure projects.

Competitive Landscape Operating alongside similarly sized firms like The Brewer-Garrett Company and John W. Danforth Company, there are opportunities to differentiate through niche expertise in fire protection and modern building controls technologies.

J.M. Brennan, Inc. Tech Stack

J.M. Brennan, Inc. uses 8 technology products and services including WordPress, oEmbed, Modernizr, and more. Explore J.M. Brennan, Inc.'s tech stack below.

  • WordPress
    Content Management System
  • oEmbed
    Dev Tools
  • Modernizr
    Javascript Libraries
  • jQuery
    Javascript Libraries
  • Priority Hints
    Performance
  • PHP
    Programming Languages
  • X-XSS-Protection
    Security
  • Gravity Forms
    Web Platform Extensions

J.M. Brennan, Inc.'s Email Address Formats

J.M. Brennan, Inc. uses at least 1 format(s):
J.M. Brennan, Inc. Email FormatsExamplePercentage
FLast@jmbrennan.comJDoe@jmbrennan.com
34%
FirstL@jmbrennan.comJohnD@jmbrennan.com
16%
FLast@jmbrennan.comJDoe@jmbrennan.com
34%
FirstL@jmbrennan.comJohnD@jmbrennan.com
16%

Frequently Asked Questions

Where is J.M. Brennan, Inc.'s headquarters located?

Minus sign iconPlus sign iconJ.M. Brennan, Inc.'s main headquarters is located at 2101 West Street Paul Avenue Milwaukee, Wisconsin 53233 United States. The company has employees across 4 continents, including North AmericaAfricaEurope.

What is J.M. Brennan, Inc.'s phone number?

Minus sign iconPlus sign icon You can contact J.M. Brennan, Inc.'s main corporate office by phone at
+1-414-342-****
. 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 J.M. Brennan, Inc.'s official website and social media links?

Minus sign iconPlus sign iconJ.M. Brennan, Inc.'s official website is jmbrennan.com and has social profiles on LinkedIn.

What is J.M. Brennan, Inc.'s SIC code NAICS code?

Minus sign iconPlus sign iconJ.M. Brennan, Inc.'s SIC code is 1711 - Plumbing, Heating and Air-Conditioning NAICS code is 23 - Construction.

How many employees does J.M. Brennan, Inc. have currently?

Minus sign iconPlus sign iconAs of March 2026, J.M. Brennan, Inc. has approximately 186 employees across 4 continents, including North AmericaAfricaEurope. Key team members include Co-President: M. B.Co-President: J. B.Director Of Technology & Marketing: E. G.. Explore J.M. Brennan, Inc.'s employee directory with LeadIQ.

What industry does J.M. Brennan, Inc. belong to?

Minus sign iconPlus sign iconJ.M. Brennan, Inc. operates in the Construction industry.

What technology does J.M. Brennan, Inc. use?

Minus sign iconPlus sign iconJ.M. Brennan, Inc.'s tech stack includes WordPressoEmbedModernizrjQueryPriority HintsPHPX-XSS-ProtectionGravity Forms.

What is J.M. Brennan, Inc.'s email format?

Minus sign iconPlus sign iconJ.M. Brennan, Inc.'s email format typically follows the pattern of FLast@jmbrennan.com. Find more J.M. Brennan, Inc. email formats with LeadIQ.

When was J.M. Brennan, Inc. founded?

Minus sign iconPlus sign iconJ.M. Brennan, Inc. was founded in 1932.

J.M. Brennan, Inc.

ConstructionWisconsin, United States51-200 Employees

J.M. Brennan is a mechanical contractor dedicated to providing high performance HVAC, Building Controls, Plumbing, Process Piping, Industrial Sheet Metal, Fire Protection & Monitoring, Site Utilities and Electrical.  We employ over 500 of the most highly skilled Pipe Fitters, Plumbers, Sheet Metal Workers, Sprinkler Fitters, Service Techs, Controls Techs, & Electricians.  We provide engineering, sustainable design, and service 24/7.  Our customers include industrial, commercial, and healthcare facilities throughout Southern Wisconsin including Milwaukee and Madison.

Section iconCompany Overview

Headquarters
2101 West Street Paul Avenue Milwaukee, Wisconsin 53233 United States
Phone number
+1-414-342-****
Website
jmbrennan.com
SIC Code
1711 - Plumbing, Heating and Air-Conditioning
NAICS Code
23 - Construction
Founded
1932
Employees
51-200

Section iconMedia & News

Section iconFunding & Financials

  • $100M$250M

    J.M. Brennan, Inc.'s revenue is estimated to be in the range of $100M$250M

Section iconFunding & Financials

  • $100M$250M

    J.M. Brennan, Inc.'s revenue is estimated to be in the range of $100M$250M

Company Leadership

  • Stylized image of a person
    M. B.
    Co-President
    Phone icon
    Mobile Phone
  • Stylized image of a person
    J. B.
    Co-President
    Phone icon
    Mobile Phone
  • Stylized image of a person
    E. G.
    Director Of Technology & Marketing
    Phone icon
    Mobile Phone
  • Stylized image of a person
    J. T.
    Director Of Controls
    Phone icon
    Mobile Phone
  • Stylized image of a person
    M. L.
    Safety Director
    Phone icon
    Mobile Phone

Employee Directory

  • Stylized image of a person
    T. K.
    Controller
    Phone icon
    Mobile Phone
  • Stylized image of a person
    J. H.
    Director Of Construction Operations
    Phone icon
    Mobile Phone
  • Stylized image of a person
    N. W.
    Director Of Service Operations
    Phone icon
    Mobile Phone
  • Stylized image of a person
    J. H.
    Director Of Construction Operations
    Phone icon
    Mobile Phone
  • Stylized image of a person
    N. B.
    Fire Protection Construction Manager
    Phone icon
    Mobile Phone

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