Mathers Tree Service is a family owned and operated business, specializing in large removals, pruning, emergency tree care, stump grinding, and arborist reports. 30 years of experience serving Contra Costa County. Call today for a free estimate. Mathers Tree Service specializes in large tree removal. With 30 years experience removing Oaks, Redwoods, and Sequoias, Mathers Tree Service is committed to the safety of not only our crew, but your property and loved ones. Have a small tree? We do those too.