After more than 22 years of service, Jim Skiera recently announced his retirement as executive director of the International Society of Arboriculture, effective by the end of 2017.

Skiera began his career at the ISA as associate executive director in 1994. His primary responsibilities were public relations and product and program development. He became executive director in 2004. Under Skiera’s leadership, the ISA has grown to become the global voice for arboriculture and professional tree care worldwide, serving more than 37,000 members and credential holders.

“It has been an honor to serve the ISA for much of my professional life,” Skiera said in a statement. “To be part of its growth has truly been an enriching experience. It was a difficult decision to leave, but the timing is right. I have been working on a succession plan with ISA staff and the Board of Directors for several years. The [ISA] is stronger today than it has ever been, and there is a foundation of talent in both staff and volunteer leadership, so I will leave with confidence that the organization will continue to thrive into the future. The future is bright and I am certain ISA will continue to make the world a better place one tree at a time.”

“Jim’s contributions to the success of [the] ISA have been invaluable,” said ISA Board President Michelle Mitchell. “His passion and dedication to the profession of arboriculture is widely recognized and appreciated.”

As of the end of 2016, the ISA Board of Directors had appointed an Executive Director Transition Committee to manage the search process for Skiera’s replacement.

Read more: A Q&A With Jim Skiera, ISA’s Executive Director