Stefan Buck headshot

Stefan Buck, M.S.

General Manager

Global Drinking Water Treatment Units

Stefan Buck has more than 15 years of experience in the drinking water filtration and environmental industries. He is responsible for executing global strategies regarding certification services for point-of-use (POU) and point-of-entry (POE) drinking water treatment systems and components, as well as for biosafety cabinet certification and the biosafety cabinet field certifier accreditation program. He joined NSF in 2013.

In a previous role, Mr. Buck directed day-to-day operations of NSF’s filtration certification program, working closely with drinking water filter manufacturers during the testing and certification process and helping to identify emerging drinking water treatment issues and assessing needs for new protocols and standards.

Mr. Buck was also directly involved in public health communication efforts during the Flint water crisis, when his team acted as the third-party expert, helping local and federal regulators and news media understand the need for testing and certification of drinking water filters with lead reduction claims.

Before joining NSF International, Mr. Buck served more than 10 years in the environmental industry with special interest in hazardous waste risk assessment and energy efficiency of buildings.

His areas of expertise include:

  • Drinking water certification
  • Point-of-use filtration systems
  • Point-of-entry filtration systems
  • Biosafety cabinetry
  • Energy efficiency