Our Team
Certified Inspectors. Detailed Reports. Protecting Your Investment.
Tri County Inspection & Environmental is a Wisconsin home inspection and environmental testing company serving homebuyers, homeowners, sellers, real estate professionals, investors, and commercial property owners throughout Southeastern Wisconsin and surrounding communities since 2002.
Our team combines decades of inspection experience with strong communication, detailed digital reporting, modern inspection technology, and a commitment to helping clients understand the homes and commercial properties they are purchasing, selling, investing in, or maintaining.
Learn more about our Wisconsin home inspection services, home and commercial inspection services, and Southeastern Wisconsin service areas. You can also learn more about our company on our About Us page or visit the Tri County Inspection & Environmental homepage. CLICK HERE to verify a home inspectors current Wisconsin Home Inspector License Status.
Aaron Marjala (Wisconsin License # 2420-106) is the owner of Tri County Inspection & Environmental, serving homeowners, buyers, sellers, real estate professionals, property owners, and attorneys throughout Southeastern Wisconsin, including the Milwaukee, Madison, and Lake Geneva areas since 2002.
A Wisconsin Licensed Home Inspector, Master Home Inspector, and Certified Inspection Expert, Aaron has performed home and property inspections for over 20 years and has completed thousands of inspections. Aaron is considered by several inspection-related organizations to be among the top 1% of inspectors not only in Wisconsin but in the United States.
Aaron provides residential home inspections, commercial property inspections, environmental testing, property condition consulting, expert witness services, and nationwide public speaking. His work includes evaluating and documenting property defects, inspection concerns, workmanship disputes, environmental hazards, and complex residential and commercial property litigation.
For Wisconsin home inspection matters, Aaron’s consulting and expert witness litigation work includes addressing applicable requirements under Wisconsin Administrative Code Chapter SPS 131, which governs home inspectors. He also provides independent property condition documentation, is highly familiar with NARI’s Disagreement Resolution process, and specializes in contractor fraud and contractor defect documentation.
Aaron holds a Master of Business Administration from Cardinal Stritch University, a Bachelor of Science in Management from Southern Illinois University Carbondale, and an Associate Degree in Management from Madison Area Technical College.
As owner, Aaron continues to be a hands-on inspector while also overseeing Tri County’s inspection standards, inspector training, report quality assurance, company operations, and client relationships. His approach is to provide thorough, fact-based, opinion-free evaluations supported by detailed documentation and clearly explained findings, so clients can make informed decisions about properties they are buying, selling, investing in, or maintaining.
Aaron is also the owner of HomeSwab™, a direct-to-consumer environmental testing company specializing in lab-certified mold, asbestos, lead paint, radon, and bacteria testing; Radon Radon Radon LLC, a North American sales distributor for Norway-based Airthings Environmental radon monitors; and Rooster Radon, a Delafield, Wisconsin company providing residential and commercial radon engineering and complex radon mitigation across the United States.
To discuss a home inspection, commercial inspection, property condition consultation, public speaking engagement, or expert witness matter, Aaron can be reached at the Delafield office, 375 Williamstowne, Suite 201, Delafield, Wisconsin, or directly at 262-225-9668.
Learn more about why clients choose Tri County Inspection & Environmental.
Tom Rehbeck serves as the acting Director of Client & Agent Success for Tri County Inspection & Environmental since 2019. His role is to help ensure the company delivers one of the highest-quality property inspection experiences in the industry.
When Tri County says it strives to be the best, not just in Wisconsin but in the country, Tom helps carry that standard forward by making sure client and agent needs are exceeded every day.
Tom is available to answer client and agent questions, provide assistance, and offer dependable support throughout the inspection process. He is committed to responsive service, strong communication, and helping others succeed.
He is also proud to be a steward of the community. Whatever clients and agents need in order to move forward with confidence, Tom works to make sure Tri County is available, helpful, and solution-oriented.
View Tri County’s complete inspection and environmental testing services, or browse our home maintenance resources and instructional videos.
Zach Wolf (Wisconsin License # 2501-106) is a professional home and commercial property inspector with Tri County Inspection & Environmental and has inspected over 3,000 homes in Southeastern Wisconsin over his +10 years as a Certified Master Inspector in Wisconsin. Zack joined the Tri County Team in 2025.
Zach performs residential home inspections and commercial property inspections throughout Tri County’s Wisconsin service area.
He is known for taking the time to listen to clients, answer their questions, and clearly explain inspection findings. His goal is to help homebuyers and property owners understand the difference between routine maintenance concerns and defects that may require more immediate attention or further evaluation.
Zach combines extensive field experience with a practical, client focused inspection approach. Every inspection is intended to provide clients with a thorough understanding of the property’s visible and readily accessible systems and components.
His goal during every inspection is to make the process thorough, informative, understandable, and comfortable for the client.
Prior to joining the Tri County Team Zack was the owner of CCW Property Consultants.
Learn more about why clients choose Tri County Inspection & Environmental.
Patricia joined the Tri County Team in 2019 and serves as the Office Manager and a primary point of contact for clients and real estate professionals working with Tri County Inspection & Environmental.
Patricia keeps Tri County’s daily inspection operations running smoothly by coordinating appointments, assisting customers with service questions, communicating with clients and real estate professionals, and helping organize inspections throughout Southeastern Wisconsin.
From the first phone call through completion of the inspection, Patricia plays an important role in making the scheduling and inspection process simple, organized, and responsive.
Clients who have questions about scheduling a home inspection, commercial inspection, environmental test, or another Tri County service can contact our office on 262-225-9668, or visit our Delafield office at 375 Williamstowne, Suite 201, Delafield.
For same day scheduling of a residential home inspection or commercial property inspection in Wisconsin, please call Patricia at Tri County Inspection & Environmental. Patricia will be happy to assist you with scheduling and confirming inspection availability.
For clients near our home office, learn more about home inspections in Delafield, Wisconsin.
Peter Leedle (Wisconsin License # 2727-106) has been a member of the Tri County Inspection & Environmental team since 2012 and serves as a part-time home inspector.
Peter contributes extensive technical and hands on knowledge to Tri County’s residential inspection operations in the Lake Geneva area and has been part of the company’s commitment to detailed professional home inspections since 2012.
In addition to his work as a home inspector, Peter teaches Technology Education at Badger High School in Lake Geneva, Wisconsin.
Peter’s background in technology education provides hands on experience involving construction concepts, tools, materials, building practices, technology, and practical problem-solving. That technical background complements his home inspection experience and his ability to explain property conditions in straightforward, understandable terms.
Peter’s combination of inspection experience and technical education helps homebuyers and property owners better understand the systems, components, maintenance needs, and conditions of the properties they are evaluating.
Clients in Walworth County can learn more about home inspections in Lake Geneva, Wisconsin, or see all the Wisconsin communities Tri County serves.
The professionals who have worked with Tri County Inspection & Environmental over the years have helped build the company’s reputation, experience, and commitment to professional property inspections throughout Wisconsin.
We are proud to recognize the former and retired members of the Tri County team and their contributions to the company.
Nolan Otremba (Wisconsin License # 2791-106) is a former member of the Tri County Inspection & Environmental team.
During his time with Tri County, Nolan contributed to the company’s commitment to thorough home inspections, professional communication, and dependable client service. Nolan assisted with the development of the award winning Tri County Inspection reporting system.
In addition to his inspection experience, Nolan teaches Technology Education for the School District of Beloit. His technology education background provides valuable hands on knowledge involving construction concepts, building systems, tools, materials, technology, and practical problem-solving.
Nolan’s combination of technical education and inspection experience allowed him to bring a practical perspective to evaluating homes and explaining property conditions to clients.
Eric Shaffer (Wisconsin License # 3366-106) is a former member of the Tri County Inspection & Environmental team who specialized in residential and commercial property inspections and building evaluations.
During his time with Tri County, Eric performed and assisted with property inspections involving structural and mechanical building systems, maintenance concerns, property conditions, and potential capital expenditures.
Eric is now the owner of Around the Block Inspections, where he continues his career in the Wisconsin home inspection industry as a business owner, professional inspector and, overall outstanding person.
We are proud to see Eric continue his career in the inspection profession. He remains a respected colleague and is missed as a member of the Tri County team. Eric’s time with Tri County Inspection remains an important part of our company’s history and growth.
Ron Piojda (Wisconsin License # 2953-106) is a retired member of the Tri County Inspection & Environmental team.
Ron joined Tri County in 2016 as a part time home inspector and transitioned to full time inspection work after retiring as a Captain from the Oak Creek Police Department, bringing his professionalism, attention to detail, and commitment to serving others into the home inspection profession.
During his years with Tri County, Ron contributed to the company’s growth, reputation, and commitment to providing thorough and professional inspection services to homebuyers and property owners throughout Wisconsin.
Ron remains an important part of Tri County’s history and helped build the foundation that has allowed the company to continue growing. Today, Ron can often be found hiking, fishing, and enjoying a well-deserved retirement.
Kevan Jackson (Wisconsin License # 3112-106) is a retired member of the Tri County Inspection & Environmental team.
Prior to joining Tri County, Kevan retired as a Sergeant from the Oak Creek Police Department. He brought his professional experience, attention to detail, and commitment to helping others to his work in the home inspection industry.
During his years with Tri County, Kevan contributed to the company’s tradition of professionalism, dependable service, and commitment to helping clients understand the homes and properties they were purchasing and maintaining.
Kevan’s contributions remain an important part of Tri County’s history and continued success. We thank Kevan for his years as part of the Tri County team and wish him the very best in retirement.
Services
Full property evaluation including structure, electrical, plumbing, roofing, HVAC.
Professional radon testing using EPA-approved equipment to detect unsafe gas levels and protect your family’s health.
Environmental hazard assessments for mold contamination, lead based paint, asbestos containing materials, and other potential indoor environmental concerns in residential and commercial properties.Our comprehensive environmental testing and evaluation services help homeowners, homebuyers, sellers, property managers, real estate professionals, and business owners identify potential health and safety risks, assess environmental conditions, and make informed decisions with confidence.
From real estate transactions and property management to renovation and maintenance planning, our detailed certified findings provide the information needed to better understand and address environmental concerns within a home or building.
Our sewer scope inspection services help homebuyers, homeowners, sellers, and real estate professionals evaluate the condition of underground sewer lines before costly problems arise. Using high resolution sewer camera equipment, we inspect the lateral sewer line from the home to the municipal connection or private septic system, identifying defects such as root intrusion, cracks, breaks, offsets, corrosion, blockages, and other conditions that may require repair or replacement.
A sewer inspection can uncover hidden issues that are not visible during a standard home inspection, helping clients avoid unexpected expenses and make informed decisions about a property's condition. Each inspection includes video documentation, detailed findings, and professional recommendations to provide a clear understanding of the sewer system's overall performance and condition.
Expert witness testimony and inspection consulting services for material defect claims, real estate disputes, property condition litigation, construction defects, environmental hazards, and home inspection matters involving Wisconsin SPS 131 Standards of Practice.
Our Certified Inspection Experts provide objective property evaluations, forensic inspections, technical analysis, litigation support, and professional expert testimony for attorneys, property owners, buyers, sellers, insurance professionals, and other stakeholders throughout Wisconsin. We deliver clear, defensible findings and independent opinions to help clients understand complex property conditions, inspection practices, building defects, and environmental issues.We proudly serve clients throughout Delafield, Waukesha, Milwaukee, Lake Geneva, Brookfield, Madison, Janesville, and surrounding Wisconsin communities.
Whether you’re buying a home, purchasing commercial property, preparing to sell, maintaining an existing property, or need environmental testing, the Tri County Inspection & Environmental team is here to help.
Explore our professional inspection services, see where Tri County provides inspections, or learn why Wisconsin property owners choose Tri County.
Protect Your Investment. Protect your health. Make Confident decisions
