C & A Arborists is the first tree service to be owned and operated by an ISA (International Society of Arboriculture) certified arborist in the Harbor Country Area. Our expert arborist, Christian Siewert, has been working in the tree service industry since 1987, and has been the owner of C & A Arborists since 1997. Christian studied arboriculture at Merristwood College in Guildford, England and received his certified arborist status from The International Society of Arboriculture after starting C & A Arborists in 1997. Christian and his team of trained arborists know the needs of trees and are trained and equipped to provide proper care. Pruning or removing trees, especially large trees, can be dangerous work. Tree service and tree removal should be done only by those trained and equipped to work safely in trees - which is why C&A Arborists is your trusted choice in Michigan tree services.