About Us

Who We Are

Welcome to McKernan's Landscape Management, a trusted name in backflow assembly testing, irrigation installations, and hardscapes based in Tumwater, WA, and the surrounding Pierce, Thurston, and Lewis Counties.

With over 30 years of experience, our journey began in the challenging times of the 1990s. Our founder, Shawn, pivoted from a career path in Criminal Justice to pursue a passion for creating and maintaining beautiful, functional outdoor spaces. Today, as a proud dad and dedicated professional, Shawn leads our team in providing top-notch services to a diverse clientele, including residential homes, HOA’s, and various commercial establishments like restaurants, hotels, office buildings, and more.


Our unique position in the industry is fortified by a comprehensive suite of certifications and licenses, including a WA State General Contractor’s License, Plumbing Contractor’s License, and a journeyman backflow plumber’s testing license, ensuring we meet and exceed industry standards. Fully insured and licensed with the WA Department of Health, we bring peace of mind to every project, knowing your outdoor space is in capable hands.

McKernan's Landscape Management stands out for our commitment to quality, safety, and customer satisfaction.

We’re not just service providers; we’re your partners in enhancing the beauty and functionality of your outdoor areas. Whether it’s ensuring the safety of your water supply through meticulous backflow testing, designing an efficient irrigation system to keep your gardens thriving, or creating inviting hardscapes, our team approaches every project with the same level of dedication and excellence.


Located in Tumwater, WA, we’re deeply connected to our community, understanding the specific needs and preferences of our clients. We pride ourselves on our ability to tackle any challenge, big or small, with innovative solutions and unparalleled craftsmanship. Let us transform your outdoor space into a place of beauty, utility, and enjoyment for years to come.