About Us
Sewer Line Repair For Your Clients. Sewer Problems? Call A Ninja
Two Great Locations
The Sewer Ninjas Standard: Engineering Meets Real Estate Strategy
Most sewer companies are led by either a businessman or a technician. Sewer Ninjas is built on a different foundation: Elite Engineering, Real Estate Strategy, and Trade Mastery. We solve the complex structural and hydraulic challenges that other companies walk away from, while understanding exactly how these issues impact property value and peace of mind.
Proudly Wisconsin Based
Sewer Ninjas has served Milwaukee-area homeowners from its Brookfield location since 2020, building a strong reputation with local crews who know Wisconsin’s infrastructure inside out. We have since expanded to the Madison area, bringing the same trusted, fast-response service to Dane County and surrounding communities. This growth keeps Sewer Ninjas focused on southern Wisconsin, from Milwaukee’s urban lots to Madison’s historic neighborhoods.
Invested in local homes
As a Wisconsin based company, Sewer Ninjas treats every project like it’s in their own backyard, using trenchless no-dig solutions to minimize disruption. Our new location strengthens service for Madison-area homeowners, building on local reviews and long-term relationships across Milwaukee and Dane County. This commitment means familiar faces, personalized care, and reliable results for Wisconsin families.
Our "Ninja" Values
We have constructed a team of passionate professionals dedicated to renewing the unseen infrastructure of our community. We believe in “No-Compromise” repairs, surgical precision, and total transparency. Whether it is a residential lateral or a complex commercial main, our team operates with an engineering mindset and a servant’s heart.
Leadership & Management
Experienced industry professionals guiding every Sewer Ninjas project with technical knowledge, operational precision, and customer-first service to ensure every project meets the highest standards of quality and performance.
Erik Ulvog
Founder / Co-Owner / Operations Lead
Erik brings over 20 years of experience in real estate transactions to the trades. Having navigated thousands of home inspections, he witnessed firsthand the stress that “sewer surprises” placed on families. He launched Sewer Ninjas to provide the honest, high-tech solutions he felt were missing from the industry for decades.
Trevor Ghylin, Ph.D., P.E.
Co-Owner / Engineer / Master Plumber
Trevor holds a Ph.D. in Civil and Environmental Engineering from UW-Madison and a B.S. from the University of North Dakota. A licensed Professional Engineer, Master Plumber, and NASSCO Certified Drain Cleaner, Trevor ensures every repair is structurally sound, legally compliant, and built to last.
Joe Walsh
General Manager
Joe is one of the industry’s foremost authorities on trenchless repair. A former Head Trainer at Hammerhead Trenchless, Joe holds nearly every NASSCO certification available. He oversees the daily execution of every project, ensuring they are held to the highest national standards of precision and quality.
Jordan Lemanski
Business Development
With a decade of infrastructure experience at Musson Brothers and technical roles at Trelleborg and Trenchless Supply, Jordan helps our clients and partners find the most reliable, cost-effective solutions for their properties.
The Field Team
Our experts in sewer diagnostics, preparation, and install specialize in advanced video inspections, high-speed descaling, and hydro-jetting—ensuring every project is accurately assessed, properly prepped, and built for long-term performance.
Mohawk Jeff
Install Manager
A veteran of the trenchless industry known for his obsessive attention to detail in precision lining.
J-P
Inspection Manager
Expert in sewer inspections and system assessments, known for accurately diagnosing issues and recommending the right fix the first time.
Doug Warren
Install Manager / CIPP Trainer
Doug brings years of hands-on CIPP installation and training experience to Sewer Ninjas. Before joining the team, Doug worked with HammerHead Trenchless, where he trained contractors and crews on proper CIPP installation techniques and best practices. As Install Manager and CIPP Trainer, Doug works directly with our crews to ensure every installation is performed with precision, consistency, and to the highest industry standards.
The Office Team
Our customer-focused office team keeps communication clear, schedules organized, and every project moving smoothly. From the first call through project completion, they connect customers with our field experts, coordinate next steps, and make sure every detail is handled with responsive, reliable service.
Andi Martin
Office Manager
Andi helps lead the customer experience at Sewer Ninjas, keeping communication clear and our office and field teams connected from the first call through project completion. She works closely with customers throughout the process, making sure questions are answered, details are communicated, and nothing falls through the cracks. Andi’s focus is making every interaction with Sewer Ninjas organized, responsive, and easy for our customers.
Chloe Martin
Customer Service Representative
Chloe is often one of the first voices customers hear when they call Sewer Ninjas. She helps customers understand their next steps, coordinates scheduling, and makes sure they get the answers and support they need. Friendly, responsive, and focused on helping people, Chloe plays an important role in delivering the level of customer service we want every Sewer Ninjas customer to experience.
Trenchless Installation Specialist:
Specializes in precision trenchless lining with a reputation for detail-driven execution—making sure every job is thoroughly assessed, expertly prepped, and built to perform for the long haul.
Nolan Gaynor
Mike Smalanskas
Matthew Williams
Sam Dillig
Larry Flowers
Tyrone Edwards
John McBride
Fully NASSCO ITCP™ Certified and partnered with the most trusted names in the industry
15-Year Warranty
All our services are backed by our 15-Year Transferable Warranty
Premier Quality
Leading products and proven installation methods facilitated by experts
Always Done Right
We're able to complete most projects in two days but make sure it's always right
Superior Service
Sewer backups can be overwhelming so we're here for you every step of the way
Our Story
Sewer Ninjas was founded to revolutionize the way homeowners address sewer problems, offering cutting-edge, cost-effective solutions that save both time and money. With a focus on prevention and education, we empower property owners to avoid costly excavations by utilizing advanced cured-in-place piping technology to renew existing sewer laterals. Led by local experts with over 15 years of experience, we combine trusted service with innovative techniques to tackle one of the most pressing challenges in homeownership—deteriorating sewer systems. Whether it’s a damaged sewer line or recurring backups, Sewer Ninjas provides seamless, minimally invasive solutions to protect your property and give you peace of mind.
