Arbor Expertise is a tree company that serves customers in Tustin. It has been in the industry for over 20 years, through the leadership of Jeff Harvey, who is an ISA-certified master arborist. The company offers a wide selection of services, including tree trimming, fertilizing, and stump grinding. It also provides arborist consultation reports for tree diagnostics, asset management, and tree health and risk assessment. Its arborists are also well-versed in common pest problems. The company serves local brands, including Westfield Mainplace.