Gary worked for a small tree company during his high school and college years. After graduating from Shippensburg University in 1973 with a business degree, Gary started his own business with a used red 1969 Dodge pickup and rented barn space. That summer he added his first employees. By the second summer he acquired his second truck, a new blue and white Dodge pickup. Since 1974, all the trucks have been painted blue and white with the company logo. The second truck enabled Gary to expand his workforce. Doug Delong, one the first employees, is now the operations manager. In 1975 the company moved from the rented barn to its present location in Upper Milford Township.

In 1979 Gary's Tree & Shrubbery Service purchased its first tree truck and began to focus primarily on tree maintenance. For the next decade the company added bucket trucks, stump grinders, backhoes, front-end loaders, and spray trucks to expand the ability to better serve customers' tree-care needs. During that time, for approximately seven years, Gary's Tree Service in conjunction with Penn State, monitored the pest population in the university's Integrated Pest Management Program. By monitoring weather conditions and collecting pest counts, the program helped local applicators determine the optimal time to apply treatment for specific insect problems. At the same time, the company began to stress, through education, proper techniques for pruning and caring for trees.

In 2016, Gary’s Tree and Shrubbery Service became a division of Bartlett Tree Experts. Our employees pride themselves on performing the best quality tree care and strive to meet the company's philosophy of complete customer satisfaction.