Green Cross arborists formulate and implement highly effective and environmentally conscientious custom tree and shrub care programs. We combine advanced training in entomology, plant pathology, and soil science with considerable field experience. Green Cross arborist credentials include: International Society of Arboriculture (ISA) Certified Arborists, Board-Certified master arborists, NOFA Accredited Organic Land Care Professionals, Connecticut licensed arborists, and New York State Dept of environmental conversation certified pesticide applicators.