Insights

Strategic partnership Great Lakes Systems recently merged with Weather Shield Roofing Systems, signaling potential for joint bids on larger projects and access to Weather Shield’s ongoing maintenance capabilities to upsell reroofing and maintenance contracts.

Large-scale footprint Having completed over sixty-million square-feet of single-ply roofing, the company demonstrates capacity for high-volume, industrial-scale projects and can be a strong candidate for mid-to-large commercial and manufacturing facilities seeking reliable single-ply options.

Approved manufacturers As an approved applicator for Carlisle SynTec, Firestone, Duro-Last, and Johns Manville, Great Lakes Systems can leverage multiple product lines to tailor proposals, optimize pricing, and win competitive bids across different owner specifications.

Growth signals The company’s revenue range and recent press release about the merger indicate momentum and willingness to pursue expanded market share, presenting opportunities for strategic outreach to facilities managers and general contractors involved in upcoming new-construction and retrofit projects.

Tech-enabled engagement Utilizing platforms like HubSpot and digital channels, there is an opportunity to engage prospects with targeted content, lifecycle marketing, and personalized outreach to capture maintenance contracts, reroofing opportunities, and new construction bids.

Great Lakes Systems Inc Tech Stack

Great Lakes Systems Inc uses 8 technology products and services including HubSpot Content Hub, Handlebars, Cloudflare Bot Management, and more. Explore Great Lakes Systems Inc's tech stack below.

  • HubSpot Content Hub
    Content Management System
  • Handlebars
    Javascript Frameworks
  • Cloudflare Bot Management
    Security
  • YouTube
    Video Players
  • HTTP/3
    Web & Portal Technology
  • X-Content-Type-Options
    Web & Portal Technology
  • Google Plus
    Widgets
  • Facebook
    Widgets

Great Lakes Systems Inc's Email Address Formats

Great Lakes Systems Inc uses at least 1 format(s):
Great Lakes Systems Inc Email FormatsExamplePercentage
First-Last@glsroof.comJohn-Doe@glsroof.com
44%
First@glsroof.comJohn@glsroof.com
37%
FLast@glsroof.comJDoe@glsroof.com
19%

Frequently Asked Questions

What is Great Lakes Systems Inc's phone number?

Minus sign iconPlus sign icon
You can contact Great Lakes Systems Inc's main corporate office by phone at . 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 Great Lakes Systems Inc's official website and social media links?

Minus sign iconPlus sign icon
Great Lakes Systems Inc's official website is glsroof.com and has social profiles on LinkedIn.

How much revenue does Great Lakes Systems Inc generate?

Minus sign iconPlus sign icon
As of August 2026, Great Lakes Systems Inc's annual revenue is estimated to be $10M - $25M.

What is Great Lakes Systems Inc's SIC code NAICS code?

Minus sign iconPlus sign icon
Great Lakes Systems Inc's SIC code is 1761 - Roofing, Siding, and Sheet Metal Work NAICS code is 23 - Construction.

How many employees does Great Lakes Systems Inc have currently?

Minus sign iconPlus sign icon
As of August 2026, Great Lakes Systems Inc has approximately 26 employees across 1 continents, including North America. Key team members include Director Of Computer Technology: D. E.Senior Project Manager: M. T.Project Manager: M. K.. Explore Great Lakes Systems Inc's employee directory with LeadIQ.

What industry does Great Lakes Systems Inc belong to?

Minus sign iconPlus sign icon
Great Lakes Systems Inc operates in the Construction industry.

What technology does Great Lakes Systems Inc use?

Minus sign iconPlus sign icon
Great Lakes Systems Inc's tech stack includes HubSpot Content HubHandlebarsCloudflare Bot ManagementYouTubeHTTP/3X-Content-Type-OptionsGoogle PlusFacebook.

What is Great Lakes Systems Inc's email format?

Minus sign iconPlus sign icon
Great Lakes Systems Inc's email format typically follows the pattern of First-Last@glsroof.com. Find more Great Lakes Systems Inc email formats with LeadIQ.

When was Great Lakes Systems Inc founded?

Minus sign iconPlus sign icon
Great Lakes Systems Inc was founded in 1969.
Great Lakes Systems Inc logo

Great Lakes Systems Inc

ConstructionMichigan, United States11-50 Employees

Great Lakes Systems Inc operates in the construction sector, specializing in single-ply roofing for commercial, industrial, and institutional buildings. Based in Jenison, Michigan, the company serves building owners, architects, general contractors, and facilities managers, delivering roofing solutions aimed at keeping structures dry and protected. With a track record of applying over sixty-million square feet of single-ply roofing, it demonstrates capability across a range of project sizes—from small scopes to large industrial facilities. The firm is an approved applicator for multiple roofing material manufacturers, reflecting an established position within the single-pply roof market. In June 2024, the company announced a partnership with Weather Shield Roofing Systems, signaling collaboration on roofing maintenance and reroofing within West Michigan.

Section iconCompany Overview

Phone number
SIC Code
1761 - Roofing, Siding, and Sheet Metal Work
NAICS Code
23 - Construction
Founded
1969
Employees
11-50

Section iconFunding & Financials

  • $10M - $25M

    Great Lakes Systems Inc's revenue is estimated to be in the range of $10M - $25M

Section iconFunding & Financials

  • $10M - $25M

    Great Lakes Systems Inc's revenue is estimated to be in the range of $10M - $25M

Ready to create more pipeline?

Get a demo and discover why thousands of SDR and Sales teams trust
LeadIQ to help them build pipeline confidently.

© LeadIQ, Inc. All rights reserved.