In 2019 I joined up with Heartwood Tree Company. As you can see, I'm still very much into trees, and I wanted to be part of a bigger team. Heartwood approaches tree care the with the same core values I held. Thanks so much to all of you who counted on Goodland Tree Works to take care of you and your trees. I truly appreciate it. ISA - the International Society of Arboriculture is the certifying agency for arborists worldwide. WAA - the Wisconsin Arborist Association is a chapter of ISA and sponsors educational programs and the Tree Climbing Championship.