Sharon Lilly, Director of Educational Goods and Services at the International Society of Arboriculture, is a past president of ISA and former chair of the ISA Certification Board. She has more than 25 years experience in the commercial sector as a climber and tree service owner, and has also taught arboriculture at the college level. In addition to authoring and producing the interactive CD-ROM series, she is the author of several popular books, including the ISA Arborist Certification Study Guide, The Tree Climbers’ Guide, The Tree Worker’s Manual, and Managing Golf Course Trees, as well as countless articles, workbooks, and other publications. She has been instrumental in directing and producing many arborist training videos including the ArborMaster Training Series, Basic Training for Tree Climbers, The Art and Science of Practical Rigging, and The Legends of Arboriculture. Sharon continues to write and conduct seminars on many aspects of arboriculture.