New leaders will support NSF’s continued growth and lead the development of new services that address emerging public health issues in the drinking water industry

ANN ARBOR, Mich. – NSF International, a global independent public health and safety organization, has promoted five general managers in its Global Water Division in response to the company’s increased growth.  These leaders will support NSF’s continued growth, help strengthen customer service, and develop new standards and services that address emerging public health needs associated with drinking water. The leaders are:

  • Dave Purkiss has been promoted to General Manager, Plumbing Products
  • Nasrin Kashefi has been promoted to General Manager, Plastics Program
  • Theresa Bellish has been promoted to General Manager, Municipal Water Products
  • Blake Stark has been promoted to General Manager, Treatment Chemicals & Filtration Media
  • Amie Scott has joined NSF International as General Manager, New Global Water Programs

“These five general managers bring a great wealth of technical and practical experience to their new roles at NSF International,” said Clif McLellan, Vice President, NSF International Global Water Division. “Their knowledge and expertise will be critical as we work to develop new drinking water standards that address emerging public health and safety needs, including public health issues that are specific to industry segments such as municipal systems, and storage and filtration. These leaders also will continue to implement process improvement initiatives that enhance customer service and the certification process.”

Dave Purkiss
General Manager, Plumbing Products

Dave Purkiss

Dave Purkiss has been promoted to General Manager, Plumbing Products. A seasoned leader with deep industry knowledge, Purkiss has worked in all areas of water treatment and distribution during his 27 years at NSF International. In his new role, he’ll lead the growth of NSF’s plumbing certification programs, which include faucets and mechanical and plastic plumbing parts.

Purkiss began his career at NSF International in 1987 managing water treatment and distribution programs. He most recently served as General Manager, Municipal Water Products. Previous NSF leadership assignments include General Manager, Drinking Water Additives and Managing Director, NSF-WRc, which provides testing for water and fitting materials, and is the largest such lab in the UK.

He is a member of the American Water Works Association (AWWA), chairs both the AWWA Polyelectrolytes and the AWWA Utility Quality Management Committees, and holds a bachelor’s degree in biochemistry from Michigan State University.

Nasrin Kashefi
General Manager, Plastics Program

Nasrin Kashefi

Nasrin Kashefi has been promoted to General Manager, Plastics Program, and will lead the program’s global expansion.

Highly regarded in the industry, she began her career with NSF International more than 24 years ago and has held leadership roles in NSF’s Plastics and Plumbing Programs. She most recently served as Business Unit Manager for NSF’s Plastics Program and was instrumental in driving a number of process improvement initiatives. She also has served as the Operations Manager for both the Water Distribution Systems and Plastics Programs.

Kashefi represents NSF International on the PPI Hydrostatic Stress Board, and is a member of the Plastics Pipe and Fitting Association, the Plastic Pipe Institute and the PVC Pipe Association. She has a master’s degree in interpersonal and organizational communication from Eastern Michigan University.

Theresa Bellish
General Manager, Municipal Water Products

Theresa Bellish

Theresa Bellish has been promoted to General Manager, Municipal Water Products, and will help expand NSF International’s testing, auditing and certification services for drinking water treatment chemicals, distribution system components and recreational water products.

She began her career with NSF International more than 15 years ago and has held several leadership positions in the Water Division, including roles as Business Unit Manager for Water Distribution System Components and Recreational Water Products.

Prior to that she served as Senior Certification Project Manager, where she was routinely lauded for superior project management skills and technical knowledge.

Bellish is a member of the American Water Works Association, the Water Environment Federation and the Association of Pool & Spa Professionals, and is a Certified Pool and Spa Operator through the National Swimming Pool Foundation. She holds a bachelor’s degree in nutrition and food science from Wayne State University.

Blake Stark
General Manager, Treatment Chemicals & Filtration Media

Blake Stark

Blake Stark has been promoted to General Manager, Water Treatment Chemicals & Filtration Media, and will lead the program’s expansion into new areas, including developing a new certification service for pool and spa treatment chemicals. This new program will complement NSF International’s existing drinking water treatment chemical certification programs, providing new services for manufacturers and distributors of water treatment chemicals.

Stark has been with NSF International for 26 years,  beginning as a field auditor and rising to a number of leadership positions, including Operations Manager, Key Account Manager and, most recently, Business Unit Manager for Water Treatment Chemicals & Filtration Media.

He is a member of the American Water Works Association (AWWA) and chair of the AWWA’s Disinfection Chemicals Committee, as well as an affiliate member of the National Association of Chemical Distributors. He has an MBA from Walsh College and a bachelor’s degree in geology from Adrian College.

Amie Scott
General Manager, New Global Water Programs

Amie Scott

Amie Scott joins NSF International in a new role as General Manager, New Global Water Programs. In this position, she’ll help NSF develop new programs, and expand existing standards and certification programs, including NSF/AWWA/ANSI 416: Sustainability Assessment for Water Treatment Chemicals and NSF/ANSI 375: Sustainability Assessment of Water Contact Products.

Scott has more than 10 years of public health experience and strong drinking water industry knowledge. She most recently served as a Business Health Research Analyst at SEAS Capital Partners in Detroit, Mich., which analyzes drinking water industry companies. Prior to this role, she served as a Research Project Manager in the Department of Surgery at Memorial Sloan Kettering Cancer Center in New York City.

She has a master’s degree in public health from Columbia University and is a member of the International Society for Pharmacoeconomics and Outcomes Research and the American Society of Clinical Oncology.

NSF International is pleased to welcome each of these leaders to their new roles.

Editor’s Note: For more information or to schedule an interview, please contact Liz Nowland-Margolis at media@nsf.org or +01 734-418-6624.

About NSF International: NSF International is a global independent organization that writes standards, and tests and certifies products for the food, water and consumer goods industries to minimize adverse health effects and protect the environment (nsf.org). Founded in 1944, NSF is committed to protecting human health and safety worldwide. Pan American Health Organization (PAHO) Collaborating Center on Food Safety, Water Quality and Indoor Environment. NSF International led the development of the American National Standards for all materials and products that treat or come in contact with drinking water. In 1990, the U.S. EPA replaced its own drinking water product advisory program with these NSF standards. Today, all major plumbing codes require certification to NSF standards for pipes and plumbing components in commercial and residential buildings. NSF International is accredited by the American National Standards Institute (ANSI).