Rob Olszewski has served as Plum Creek’s vice president, environmental affairs since October 2001. In his role, he is responsible for managing the environmental aspects of approximately 7 million acres of company timberlands as well as the company's  manufacturing facilities.

He began his career in 1980 as state forest hydrologist with the Florida Division of Forestry. From 1986 to 1993, he served as director of governmental affairs for the Florida Forestry Association. He then worked for Georgia-Pacific Corporation and The Timber Company where he served as director of environmental affairs. He held this role until he joined Plum Creek in 2001 when Plum Creek merged with The Timber Company.

Olszewski received a bachelor of science degree in forestry from Michigan Technological University and a master of science in forest hydrology from the University of Georgia.

He serves on the board of the Forest Landowners Association and chairs the Forest Landowner Foundation, is on the Alumni Advisory Committee of the School of Forest Resources at the University of Georgia, and is active in various roles with the National Alliance of Forest Owners.