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Get To Know Us

We are known for our construction work across Wisconsin, northern Illinois, and northeast Iowa and nationwide for Industrial clients. Projects ranging from $1,000 to $100+ million in size. The State Capitol, Milwaukee Bucks Training Center, Epic Systems, and Camp Randall are just a few recent iconic projects. However, we are not just known for our awe-inspiring projects. Our proudest accomplishment is our people. We hire team members who share beliefs in family, safety, partnership, and process improvement. Our culture is one of trust and personal responsibility dedicated to empowering and growing employees for years to come.


to identify, hire, train, and retain the best people to serve our customers.

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In Five Generations

We’ve grown into a $500+ million, full-service construction company with over 650 employees. Much has changed since then, but one thing has stayed the same:

Our clients can always rely on us to get the job done on time and at the highest quality.

John Patrick Cullen, our founder, set an example for his employees that we still live by today: Deliver the best product to the customer, and conduct yourself with the utmost integrity and trustworthiness. We carry his legacy forward by continuously improving every process we perform—and working smarter and harder than any other construction company in our region.

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Our Core Values

Deeply Rooted Values & Beliefs

JP Cullen team members emulate the following traits that make up our core values: loyalty, accountability, integrity, drive, humility, and leadership. Our set of beliefs represent our highest priorities and our fundamental driving forces – family, safety, process improvement, great builders, partnerships, and people development. Our core values and beliefs form a solid foundation of who we are, what we believe, and who we want to be moving forward.

Our P.R.I.D.E.

The candidates who we take seriously maintain the highest professional and personal standards, work hard, and tackle the tough jobs while having fun.

Our Ethics

Our culture of integrity, trust, and personal responsibility requires ethical conduct. JP Cullen employees are obligated to report suspected or actual violations of the law and company policies, regardless of the identity or position of the suspected offender, to their direct supervisor.
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Diverse Partnerships

Our mission statement and values reflect our dedication to creating a workplace that embraces diversity and welcomes individuals from all backgrounds. We firmly believe that our people are our greatest assets, and we are committed to fostering a culture of inclusion. We view diversity as a competitive advantage, recognizing that diverse teams are more effective at problem-solving. By bringing together individuals with different perspectives, we avoid becoming stagnant in our approaches and find more innovative solutions for our clients.
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Meet The Family

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.

The different opportunities within JP Cullen are vast, also the family style reputation the company has and continually reinforces day to day are a great culture to be a part of.

Jeremy Fischer
Shop Foreman
JP Cullen

As I child I remember seeing Cullen operations in downtown Madison & Milwaukee building some of the most iconic buildings in the State. Of course, I wanted to come work for a contractor that works on Camp Randall, Buck’s Stadium, Miller Park, State Capital & Milwaukee City Hall. Who wouldn’t want to come work for the best?

Ben Bobzien
Project Manager
JP Cullen

I knew after meeting with some of the employees who have been here for many years that JP Cullen took pride in growing their employee’s careers and finding the right place for an employee within the company.

Kayla Gooslin
Administrative Assistant
JP Cullen
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How it all started

Our History

In 1892, John Patrick (or J. P.) Cullen founded J. P. Cullen & Sons Construction in Janesville, Wisconsin, about 50 miles southeast of Madison.


In 1892, John Patrick (J.P.) Cullen founded a construction company in Janesville, Wisconsin, and builds his first project. The era when a wheelbarrow could be purchased for 95 cents and a ball of twine costs five cents at the local hardware store.

Being a respectable contractor and business owner, he was a great catch for any young lady. It wasn’t long before he fell in love, his heart snared by another Irish émigré, Alice Rooney. They married November 24, 1892, a mere four years after meeting. The two go on to have four children, earmarking the beginning of the succession of the now fifth generation of ownership.

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Building Our Communities

Our dedication to personal development, family and community is in our blood and at the core of our business.