Commercial
From auditoriums to athletic facilities and corporate offices, we’ll navigate you through regulations, laws, codes, and compliance.
Education
We create modern learning environments that benefit students, educators and the greater community – at the lowest possible cost.
Healthcare
We envision and build innovative healthcare facilities that help providers focus on patient-centered care.
Industrial
Working for Fortune 500 companies across a range of industrial markets, our team makes sure each project meets its full potential.
Science & Tech
We work with owners across the commercial, industrial, healthcare and education markets on complex projects.Â
Prefabrication
At the core of our operations is a focus on flexibility, innovation, and finding ways to add value for our clients.
Virtual Design & Construction
Self-Performed Work
We pride ourselves on training our team to become construction experts so we can self-perform as much of the work on a project as possible.
Preconstruction
Our preconstruction services lay the foundation for safe and successful outcomes, from a project’s inception to its completion.
Referendum Services
We help you educate voters on referendum issues, develop a preconstruction plan, and maximize value for every taxpayer dollar invested.
Sustainability
Historic Restoration
We bring decades of knowledge to your restoration project which allows us to execute the work efficiently.
Contractor Services
Our contractor services have been carefully formulated over the years to best serve our clients and their needs.
Design-Build
Industrial Services
We provide the skilled labor and field expertise needed to support industrial projects from start to finish.
About Us
In five generations, we’ve grown into a $950+ million, full-service construction company with over 850 employees.
Blog
Diversity, Equity & Inclusion
Our team is highly involved in organizations and committees to bring more diversity to the A/E/C industry.Â
Leadership
Meet our leadership team who ensures that our crews and teams have access to the tools, resources and opportunities to deliver the results our clients expect.Â
Building Our Communities
Bid Opportunities
Browse our future projects and uncover opportunities to work with the industry’s finest.
Subcontractor Registration
Register your company with JP Cullen using our online portal.
Confidentiality Agreement
We are committed to protecting sensitive data and information to ensure a smooth working relationship between all parties.
Commercial
From auditoriums to athletic facilities and corporate offices, we’ll navigate you through regulations, laws, codes, and compliance.
Education
We create modern learning environments that benefit students, educators and the greater community – at the lowest possible cost.
Healthcare
We envision and build innovative healthcare facilities that help providers focus on patient-centered care.
Industrial
Working for Fortune 500 companies across a range of industrial markets, our team makes sure each project meets its full potential.
Science & Tech
We work with owners across the commercial, industrial, healthcare and education markets on complex projects.Â
Prefabrication
At the core of our operations is a focus on flexibility, innovation, and finding ways to add value for our clients.
Virtual Design & Construction
Self-Performed Work
We pride ourselves on training our team to become construction experts so we can self-perform as much of the work on a project as possible.
Preconstruction
Our preconstruction services lay the foundation for safe and successful outcomes, from a project’s inception to its completion.
Referendum Services
We help you educate voters on referendum issues, develop a preconstruction plan, and maximize value for every taxpayer dollar invested.
Sustainability
Historic Restoration
We bring decades of knowledge to your restoration project which allows us to execute the work efficiently.
Contractor Services
Our contractor services have been carefully formulated over the years to best serve our clients and their needs.
Design-Build
Industrial Services
We provide the skilled labor and field expertise needed to support industrial projects from start to finish.
About Us
In five generations, we’ve grown into a $950+ million, full-service construction company with over 850 employees.
Blog
Diversity, Equity & Inclusion
Our team is highly involved in organizations and committees to bring more diversity to the A/E/C industry.Â
Leadership
Meet our leadership team who ensures that our crews and teams have access to the tools, resources and opportunities to deliver the results our clients expect.Â
Building Our Communities
Bid Opportunities
Browse our future projects and uncover opportunities to work with the industry’s finest.
Subcontractor Registration
Register your company with JP Cullen using our online portal.
Confidentiality Agreement
We are committed to protecting sensitive data and information to ensure a smooth working relationship between all parties.


Location:
American Transmission Company (ATC) underwent a significant transformation by merging two offices and expanding their Cottage Grove campus to accommodate approximately 150 employees from the Madison area. Our team was entrusted with the construction of an office building addition, a data center, and an outdoor equipment yard.
The result was a modern, sustainable building designed to maximize natural light and foster employee well-being. Inside, the facility boasts enhanced gathering spaces, healthy food options, and a fitness center, creating a conducive environment for productivity and collaboration. Surrounding the building, native prairies and a walking path were incorporated to further enrich the workplace experience.
Innovative approaches such as prefabrication were used throughout the project to streamline the construction schedule. For instance, the data center, housing over three miles of underground conduit, saw significant time savings through the prefabrication of conduit racks by the electrical contractor. Similarly, the mechanical contractor prefabricated a 45-foot-long pipe rack for hydronic piping, designed on wheels for easy positioning and installation using chain falls. These efforts not only accelerated the project timeline but also minimized waste and mitigated safety risks.
By leveraging prefabrication techniques and prioritizing sustainability and employee well-being, our team successfully delivered a state-of-the-art facility that embodies efficiency, innovation, and excellence.
Our Locations