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Retail Store Retail Store Kohl's Department Store Photo 1
Education (K-12) Education (K-12) Kennedy Community School Photo 1
Hospital / Nursing Home Hospital / Nursing Home St. Cloud Orthopedic Clinic Photo 1
Auto Dealership / Service Auto Dealership / Service St. Cloud Subaru
Restaurant Restaurant Phoenix Grill & Bavarian Restaurant
Casinos Casinos The Casino at the Downs
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Founded In: 1969
Size: 100-249 Employees
Annual Vol: Undisclosed
LEED Experience BIM Experience

Our Story

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Our Winkelman office was originally founded by Don Winkelman, Sr. and his sons in 1969, providing services in Central Minnesota as a general contractor focused on commercial and institutional construction.

In 1983, two of the company’s long-term employees, Duane Schultz and Keith Schupp, purchased and began to grow the family-owned business. Over the years the Winkelman office built upon its knowledge and reputation to become a regional full-service construction company working primarily in Central Minnesota but also in Wisconsin, North Dakota and Iowa. In 2017, the firm transitioned to the Bradbury Stamm family of companies where we continue to work to enhance their capabilities and to support their local markets.

What We Do

Products/Services Relating to Construction Management
Products/Services Relating to General Contractors

Project Experience

Non-Union Prevailing Wages (Davis Bacon)
Service Sector:
Public Private
Project Types:
New Alterations/Renovations Interior Fit-Ups
School / College / University
Fire / Police Station
Gas Station
Hotel / Motel
Manufacturing Plant
Apartments & Condominiums
City / Town Hall
Terminal - Airport / Bus / Railroad
Church / Synagogue
Jail / Prison
Parking Garage
Club House / Community Center
Mixed Use
Storage Facility / Warehouse
Design Build
Court House
Fitness Center
Medical Office
Post Office
Radio / Television Station

Service Areas

Associations & Memberships

Member of LEED (Leadership in Energy and Environmental Design) LEED (Leadership in Energy and Environmental Design)
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