About Us

SLO Trenchless is locally owned and operated family business. We’ve proudly served the San Luis Obispo County and surrounding cities since 1992. We’ve been in business as general contractors on the Central Coast for over 25 years, currently specializing in sewer lateral replacement with state of the art trenchless/ pipe bursting technology.

Mark Alonzo is principal of the company. He has a General Contractor’s license and a General Engineering License and prides himself in his reputation for providing excellent customer service and for getting the job done right the first time. He has an excellent working relationship with the staff at various City’s Public Works Departments and Building Departments.

Hana Novak is co-principal and office manager. Responsible for scheduling, invoicing and is in charge of all matters behind the scenes. With a background in municipal planning and engineering she is able to navigate the permit process with ease.

Our crews are licensed, bonded, clean and professional. They take pride in their work. Many of our employees have been working for our company for over 10 years.