Business Details
50+ Years
experience
Your Trusted Midwest Commercial Construction Partner
Immel Construction has been a trusted leader in the construction industry since 1961, delivering high-quality projects across the Midwest. Our employee-owned structure ensures every team member takes personal responsibility for project success, combining decades of collective experience with a commitment to safety, craftsmanship, and integrity. We specialize in full-service construction solutions including general contracting, design-build, and historic restoration, serving diverse sectors like education, healthcare, and industrial.Our core values drive every decision, from preconstruction planning to final execution, ensuring transparent communication and client satisfaction. With a proven track record in complex projects and a focus on innovative construction methodologies, we consistently exceed client expectations while maintaining strict adherence to budgets and timelines.
Services
General Contractor
Construction Management
Design-Build
Preconstruction Services
Cost Estimating
Industrial Millwright
Metal Buildings
Historic Restoration
Details
- Year established: 1961
Highlights and features
- We offer 60+ years of construction expertise with employee ownership accountability
- Our team holds LEED AP certified professionals for sustainable building solutions
- We maintain a 98% on-time project completion rate across all sectors
- Our self-performed concrete and carpentry trades ensure quality control
- We hold industry-leading safety certifications with annual third-party audits
Associations and certifications
- Employee Stock Ownership Plan (ESOP)
What people say
Exceeded expectations
Completed ahead of schedule
Exceptional craftsmanship
Transparent communication
Expert project team
Services
General Contractor
Immel Construction provides comprehensive general contracting services for commercial projects of all scales. Our team manages every phase from initial planning to final execution, ensuring strict adherence to budgets and timelines while maintaining the highest quality standards. With expertise in multiple sectors including education, healthcare, and industrial facilities, we deliver tailored solutions that meet specific client needs. Our employee-owned structure guarantees personal accountability and exceptional attention to detail on every project.
Design-Build
Our design-build services offer a streamlined approach combining architectural design and construction under one contract. This method reduces project timelines by 20-30% while maintaining cost efficiency. We collaborate directly with architects and engineers to ensure seamless integration of design intent with practical construction requirements. This single-source responsibility model minimizes risks and ensures consistent quality throughout the project lifecycle, from concept development to final occupancy.
Historic Restoration
Specializing in historic preservation, our team restores architecturally significant buildings to their original grandeur while meeting modern standards. We employ traditional craftsmanship techniques alongside contemporary materials to ensure structural integrity and historical accuracy. Our experts handle all aspects including facade restoration, interior preservation, and code compliance upgrades. With notable projects like the Cana Island Light Station restoration, we combine technical expertise with deep respect for historical significance in every preservation effort.
Pre-Engineered Metal Buildings
We deliver customized pre-engineered metal building solutions for commercial and industrial applications. Our systems combine advanced engineering with flexible design options to create cost-effective, durable structures. From initial concept through fabrication and installation, our specialists ensure optimal material selection and efficient construction methods. These energy-efficient buildings meet strict performance standards while offering rapid construction timelines and long-term maintenance savings for clients across multiple industries.
Construction Management
Our construction management services provide clients with expert oversight throughout the project lifecycle. We coordinate all aspects including scheduling, budget control, and subcontractor management to ensure successful project delivery. Utilizing advanced project management software and proven methodologies, we maintain transparency and accountability at every stage. Our team's extensive experience in complex commercial projects ensures risk mitigation, quality assurance, and adherence to the most stringent industry standards.
People
Paul Martzke
President
With over 30 years in construction, Paul leads Immel's operations as President. A licensed architect and LEED AP certified professional, he oversees company strategy and client relationships. Active in industry organizations, Paul has received multiple leadership awards and maintains strong community involvement through local civic groups.
Alex Santos
Executive Vice President
Alex brings 35+ years of construction management experience to Immel's leadership team. Specializing in large-scale commercial projects, he oversees project delivery from preconstruction through completion. His expertise spans retail, healthcare, and education sectors. A LEED accredited professional, Alex focuses on operational efficiency and client satisfaction across all project phases.
Ali Court
Controller
As Controller, Ali manages Immel's financial operations with over a decade of accounting experience. She directs financial planning, risk management, and reporting processes. Her strategic approach ensures fiscal responsibility while supporting company growth initiatives. Ali maintains active CPA certification and contributes to industry financial management best practices.
Brian Wetzel
Vice President, Operations
Brian oversees Immel's operational risk management with 20+ years in construction compliance. He ensures adherence to safety standards and regulatory requirements across all projects. His background includes implementing award-winning safety programs. Brian maintains industry certifications in risk management and workplace safety compliance.
Questions
What construction services does Immel offer?
We provide full-service construction including general contracting, design-build, construction management, historic restoration, and pre-engineered metal buildings across commercial, industrial, and institutional sectors.
Do you work outside Wisconsin?
While based in Green Bay, we complete projects throughout the Midwest and have completed projects in multiple states including Michigan, Minnesota, and Missouri.
How does your design-build process work?
Our design-build approach combines architectural design and construction under one contract, reducing timelines by 20-30% through integrated project delivery and single-source accountability.
Are you an employee-owned company?
Yes, Immel Construction became 100% employee-owned in 2019 through an ESOP structure that aligns our team's interests with client success and long-term company growth.
How do you ensure project quality?
We maintain quality through self-performed concrete and carpentry trades, LEED-certified professionals, regular third-party safety audits, and a 98% on-time completion track record.
Can you handle complex construction projects?
Our team specializes in complex commercial projects with notable examples including university residence halls completed ahead of schedule and large-scale industrial facilities with international coordination.
