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Keeley Companies

Construction and technology services across infrastructure

Overview

Keeley Companies provides construction and technology services through its subsidiaries, including L. Keeley Construction, ADB Companies, ZeroDay Technology Solutions, and Keeley Development, serving industrial, civil, building, infrastructure, logistics, and wireless projects. Its work combines general contracting, development, and technology solutions delivered through project-based contracts and long-term partnerships, coordinated by teams that integrate construction and tech disciplines. The company differentiates itself with a customer-focused culture that empowers employees and emphasizes safety, well-being, and career growth to build loyal partnerships. Its goal is to deliver reliable, high-quality construction and technology services on time and safely, while growing through repeat business and strong client relationships.

Significant Headcount Growth

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About Keeley Companies

Simplify's Rating
Why Keeley Companies is rated
B-
Rated B on Competitive Edge
Rated B on Growth Potential
Rated C on Differentiation

Industries

ConsultingIndustrial & ManufacturingEnterprise SoftwareCybersecurity

Company Size

51-200

Company Stage

N/A

Total Funding

N/A

Headquarters

St. Louis, MO

Founded

1976

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Simplify's take

What believers are saying

  • Keeley Construction broke ground on Mapletree's 419,520-square-foot Joliet project in July 2026.
  • The company reported 1.51 GW installed across 17 solar projects by August 2026.
  • Leadership succession finished in October 2025, with Sean Keeley now president.

What critics are saying

  • 302 Rockwell sued Keeley Construction Group for trademark infringement in July 2025.
  • Keeley Electrical Contractors' New Balance unpaid-work suit exposed collection risk and margin pressure.
  • A failed leadership transition would fracture the family brand and push Fortune 500 clients elsewhere.

What makes Keeley Companies unique

  • Four-unit platform spans construction, development, restoration, and wireless infrastructure nationwide.
  • Self-performing civil and mechanical work gives Keeley tighter schedule control on complex projects.
  • ADB won 2026 Network Technology Partner of the Year with Render Networks.

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Benefits

  • Hybrid Work Options

Growth & Insights and Company News

6 month growth

16%

1 year growth

15%

2 year growth

15%
DELUX Magazine
Aug 16th, 2022
Maryville University partnered with Keeley Companies on Jul 16th 22'.

“Maryville University recently announced its partnerships with Keeley Companies and RUNG for Women as just two of the many efforts to help build capacity and expansion for businesses in St. Louis,” said Davis.

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