Commercial Building Contractor

About Immel Construction

Immel is an industry leader in providing high-quality construction services. We’ve advanced, expanded, and proven the Immel Difference by instilling our Core Values — Safety, Craftsmanship, Transparency, Integrity, Community, and Reliability — into everything we do.

Learn The Immel Difference

Explore Our Services

Our Values

Our core values reflect our commitment to delivering exceptional projects and providing outstanding service to our clients. Our dedication to these principles underscores our respect for our clients and our deep care for the communities we serve.

Safety

We always put safety first, as it ensures the well-being of our team, minimizes risks, and upholds our commitment to delivering high-quality projects responsibly and reliably.

Craftsmanship

Our commitment to craftsmanship guarantees the highest standards of quality and precision in every project. Delivering projects that cater to your particular needs is why we exist.

Transparency

We’re always transparent with our customers because it builds trust, fosters clear communication, and ensures that all stakeholders are aligned and informed throughout every project.

Community

Community is at the heart of everything we do. It strengthens our local relationships, supports sustainable development, and reflects our commitment to contributing positively to the areas where we work.

Integrity

We uphold the highest ethical standards to foster trust and reliability in all our professional relationships and projects.

Reliability

As a commercial building contractor, our commitment to reliability ensures consistent performance, timely project completion, and dependable service, thereby strengthening client trust and satisfaction.

Employee-Owned Commercial Building Contractor

Our People are Employee Owners

Immel Construction's status as a 100% employee-owned company is highly beneficial for our clients, as it means every team member has a personal stake in the success of your project. This ownership structure fosters a deep sense of care, responsibility, and commitment among all employees, ensuring that each project receives the utmost attention to detail and dedication to excellence. When our projects stay on budget and on time, we all win.

Our Construction Services

We are a full-service construction services firm offering general contracting, construction management, design/build, cost estimating, millwright, pre-engineered metal buildings, historic restoration, and additional pre-construction services.

GENERAL CONTRACTOR

General Contractor

We provide top-tier general construction services that meet a wide variety of needs in a variety of industries. We handle projects both large and small in retail, healthcare, education, manufacturing, and so much more.

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CONSTRUCTION MANAGEMENT

Construction Management

We don’t just build — we unlock potential. Let our team of experts relieve you of your concern about managing your project’s potential scope by getting budget, schedule, and constructability input at the beginning of your project.

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DESIGN-BUILD

Design-Build

For every project, our design-build services enable us to seamlessly integrate conceptual design with functional performance. Our building design services provide clients with a single point of contact throughout the entire project, from initial design to completed construction. We partner with architect and engineering firms as one unified line of communication, and one streamlined process, we’re able to work quickly and efficiently.

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COST ESTIMATING

Cost Estimating

Our cost estimating team has a stellar reputation for delivering accurate, competitive pre-construction services. Before the construction phase, we meticulously review every aspect of the project, troubleshoot potential risks, evaluate scenarios, estimate expenses, and determine costs. This comprehensive approach provides our customers with a clear overall picture of their commercial project and ensures it is built right the first time.

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INDUSTRIAL/MILLWRIGHT

Industrial/Millwright

Immel Construction tackles every industrial project with care and confidence. Our craftsmen and tradesmen possess vast expertise in industrial services, spanning from equipment relocation to constructing cutting-edge facilities. We execute these essential tasks using top-of-the-line equipment, adhering meticulously to layout plans, blueprints, and other specified requirements, all while meeting industry standards.

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PRE-ENGINEERED METAL BUILDINGS

Pre-Engineered Metal Buildings

Pre-engineered buildings are far from one-size-fits-all; we create solutions for your project that fit your specific needs. With advanced engineering capabilities and unlimited design possibilities at a price you can afford, our team of pre-engineered metal building contractors will guide you through your project’s journey and deliver a fantastic building experience and final product.

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HISTORIC RESTORATION

Historic Restoration

We specialize in providing expert restoration and commercial construction services to address structural damage and restore legacy buildings to their former glory. We offer comprehensive project estimations, loss recovery timelines, and manageable budgets regardless of the extent of disrepair. We’ve played a pivotal role in restoring notable landmarks, such as the Ferguson Family YMCA and the restoration of the Cana Island Light Station.

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PRECONSTRUCTION SERVICES

Preconstruction Services

Our efforts don’t start on the first day of construction. Bring in our team early on in the process and we’ll guide you through the project from a constructability viewpoint. Before the work begins, we will work with you on the overall analysis, strategy, and feasibility of your project.

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Get to Know Our Leadership Team

Here at Immel Construction, every team member is dedicated to ensuring our clients' success. We take pride in the collaborative efforts of our talented team.

Paul Martzke

President

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Alex Santos

Executive Vice President

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Ali Court

Controller

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Brian Wetzel

Vice President, Operations

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President

Paul Martzke

With more than 30 years' experience in the industry, Paul has built a diverse portfolio of projects. As President of Immel Construction, he continues to remain hands on with our clients and throughout each department, overseeing company operations. Paul is a licensed Architect in Wisconsin, LEED AP certified, and proudly promotes his induction as a 2024 Titan 100. Serving the community is a strong value of Paul's, which is showcased through his involvement as Past President and Board Member for AGC Wisconsin, Past President and Board Member for AIA Wisconsin, Wisconsin Architects Foundation Board Member, Rotary Club Member, and more. Paul enjoys all things winter and never misses a chance to go snowmobiling and ice fishing with his family.

Executive Vice President

Alex Santos

Alex brings over 35 years of experience to Immel Construction’s leadership team and showcases LEED AP, BD+C accreditations. Through his background in project management, Alex has years of experience working on large-scale projects in the retail, education, healthcare, municipal, and commercial industries. Alex directs and has full oversight of our project management teams along with overall administrative and technical management on construction projects from the pre-construction phase through final acceptance by the client. He excels in project scheduling, quality control, and securing on-time completion of our work. Alex is an avid golfer and even coached for his daughters for a local high school girls’ golf team.

Controller

Ali Court

Ali Court, CPA brings extensive knowledge and innovative outlooks to our team with over 10 years' experience. She is responsible for all the financial management of the company and works closely with the leadership team to establish the company’ financial objectives. Ali is responsible for the financial planning, management of financial risks, record-keeping, financial reporting, and analysis of data to make financial predictions for the company. Outside of work, you can find Ali spending time with her husband, three boys, and their golden retriever.

Vice President, Operations

Brian Wetzel

Brian's background includes over 20 years of industry experience with specialized knowledge in risk management and compliance. In his role as Vice President, Operations, his primary responsibilities include ensuring Immel Construction’s functions and efforts in risk management are being completed to the company’s high standards, our client’s satisfaction, and the requirements of regulatory agencies. Brian loves spending time outdoors from camping with his family to hunting and fishing.

The History of Immel Construction

Our legacy began in 1961 when Howard Immel, Inc. was founded, but our story dates back before that. Immel Construction is proudly built on our people, history, and reputation.

1950s

In the 1950s, Howard Immel and his brother, Ed, joined their father and uncle working at Immel Construction Company in Fond Du Lac, Wisconsin.

1960s

In 1961, Howard Immel eventually set out on his own and founded Howard Immel, Inc. Along with his wife, Gail, he ran the company from their home before moving to rental quarters.

1970s

In 1978, Greg and Gary Immel, along with Elton Harpt, Bob Huettl, and Bud Schroder, acquired Howard Immel, Inc. A change in ownership was no change in integrity, dedication, or craftsmanship; Immel continued delivering quality and value to their clients.

1980s

In 1982, the firm moved to Radisson Street, making Green Bay their long-time home. A sense of pride and endearing dedication to the Green Bay community was born.

2000s

In 2006, Greg and Gary Immel passed ownership of the company to Kelly Hafeman and Pete Smits, both long-time Immel employees.

2010s

In 2019, Kelly Hafeman and Pete Smits sold their shares of the company to an Employee Stock Ownership Plan. Immel Construction became a 100% employee-owned company, which our employees still reap the benefits of today.

2020s

In 2024, Immel Construction moves its headquarters to 2601 Development Drive, Green Bay. Today, the company is recognized as one of the most trusted and respected contractors in the Midwest.

1950s

In the 1950s, Howard Immel and his brother, Ed, joined their father and uncle working at Immel Construction Company in Fond Du Lac, Wisconsin.

1960s

In 1961, Howard Immel eventually set out on his own and founded Howard Immel, Inc. Along with his wife, Gail, he ran the company from their home before moving to rental quarters.

1970s

1980s

In 1982, the firm moved to Radisson Street, making Green Bay their long-time home. A sense of pride and endearing dedication to the Green Bay community was born.

2000s

In 2006, Greg and Gary Immel passed ownership of the company to Kelly Hafeman and Pete Smits, both long-time Immel employees.

2010s

2020s

In 2024, Immel Construction moves its headquarters to 2601 Development Drive, Green Bay. Today, the company is recognized as one of the most trusted and respected contractors in the Midwest.

Where You Can Find Us

Top Commercial Building Contractor in the Upper Midwest

We've established strong roots in Green Bay, and in the years since have expanded to serve clients across the Midwest.

Our Awards & Industry Recognition

From our reputation in safety, to our company culture, to regularly being recognized for our hard work, we have a lot to be proud of!

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Contact Immel Construction

By upholding our core values, we ensure that every project is completed with the highest standards of quality, safety, and integrity. If you’re ready to get to work, let’s talk.