Kresge has a Masters of Science degree in environmental management from the University of San Francisco and a Bachelor of Arts degree in economics and communications from the University of California, Davis. He has worked as an environmental planner for the Northern Marianas government and as an environmental consultant and investigator on environmental safety issues and PCB contamination detection and mitigation.

Before moving to Hawaii, Kresge was the owner-consultant of World Environmental Services and Training in Saipan for six years.

Kresge most recently worked on the Kahoolawe Island Clean-up Project as the Assistant Environment and Natural Resources Manager/Senior Scientist for Parsons Infrastructure and Technology on Maui. Part of his duties included supervision of compliance with federal, state, county and US Navy storage and disposal regulations for hazardous materials, solid and hazardous waste and recyclable materials.

"Gregg's technical background will certainly be an asset to our county's new Department of Environmental Management", Tavares said. "His work in Saipan and Kahoolawe brings a distinctive view of how environmental management and government services are administered in an island state".