OESI Active Members are firms located within the State of Ohio that recycle, treat or dispose of hazardous and nonhazardous waste materials. Our Active Members are subject to regulation by the Resource Conservation and Recovery Act. Active Members comprise the governing body of OESI.

• Arcwood Environmental (Heritage Environmental Services, Inc.)
• Crystal Clean (Envirosafe Services of Ohio, Inc.)
• Environmental Enterprises, Inc.
• Midwest Environmental Services
• ReWorld
• Ross Environmental Services, Inc.
• Systech Environmental Corporation
• Republic Services (US Ecology)
• Valicor Environmental Services
• Veolia Environmental Solutions & Services
• Vickery Environmental, Inc.