Casey Walentowicz is an ISA Certified Arborist with more than 25 years of experience in the tree service industry. In addition to his hands-on experience, he studied arboriculture at Rutgers and Cook universities. Casey has spent his entire career furthering his and his employees’ knowledge of tree care, urban forestry management, and technical operations.

Aspen Tree Service was founded in Clifton, New Jersey, in 1986 by Casey's father, Kazimierz Walentowicz. Though Casey took over ownership in 2010, the company is still family-run, with Kazimierz remaining an active part of daily operations.