Meet the Mazzei Leadership Team

From left to right: Geoff Whynot, Celia (Mazzei) Cobar, Angelo Mazzei and Paul Overbeck

Leadership Team

Our Mission

Mazzei is dedicated to conducting business with honesty, integrity and responsiveness in the development and application of innovative science-based technologies to make more efficient use of the world’s water resources.

Angelo L. Mazzei founded Mazzei Injector Company in 1978 and serves as Chairman/CEO. He is responsible for the strategic direction of the Company and the Company’s vision. He emphasizes providing solutions-based systems and products to our customers.


Angelo has been granted sixteen patents in the area of fluid processing and related equipment with emphasis in injection of gases and liquids into water streams and the removal of gases from water. Angelo was also recognized by The American Society of Agricultural Engineers in 2002 with the AE-50 Award as one of the 50 best agricultural related inventions in the United States.


He has recently received patents on the injection of air or gases into subsurface irrigation water to significantly increase crop production. Angelo has presented several scientific papers at conferences worldwide.


Angelo received his Bachelor of Science degree from California State University at Fresno. He currently serves on several community and professional Boards including Valley Republic Bank of Bakersfield, Kern Agricultural Foundation, The International Center for Water Technology (ICWT), Fresno, CA, California State University, Bakersfield (CSUB) Foundation, and the International Ozone Association.

Angelo Mazzei

Angelo Mazzei


Geoffrey Whynot was named President of Mazzei Injector Company in July 2014. In this capacity, he oversees the day-to-day operations and bottom-line performance of the company. Geoff sets the managerial and operational goals for the company and, under his direction, assures that these goals are met. Geoff joined Mazzei in April 2010 as Chief Financial Office, and in January 2012 his title and duties expanded to include that of Chief Operating Officer.


Geoff has an extensive finance and accounting background as CFO in a variety of industries, including manufacturing, technology, construction and communication. His experience includes completion of a number of acquisitions and corporate consolidations, negotiation of numerous financings, creation of a joint venture to develop and market imaging software and the successful implementation of financial restructurings. In addition, Geoff managed the audits of several fortune 500 companies.


Geoff received his Bachelor of Science degree in Management from Babson College in Massachusetts, and he is a Certified Public Accountant and a member of the American Institute of Certified Public Accountants.

Geoffrey Whynot

Geoffrey Whynot


Paul Overbeck is responsible for the sales and marketing of Mazzei. He and his staff actively focus on a consultative approach to technical sales. Their extensive applications experience allows Mazzei to look at the big picture to deliver Mazzei components and/or systems to meet specific stand-alone application requirements or enhance performance in larger complex systems integration.


Mazzei’s sales team strives for and delivers cost effective solutions in agriculture, chemical addition, municipal and industrial water and wastewater treatment and growing water reuse applications globally.


Paul brings over 30 years of water and wastewater process technologies experience to Mazzei. Paul joined Mazzei at the beginning of 2012 after serving as the Executive Director of both the International Ozone Association (IOA) and the International Ultraviolet Association (IUVA). Formerly, Paul was directly involved in the development of Mazzei’s GDT™ Process as President of GDT Corporation and was Chief Operating Officer of Osmonics (now a part of GE Power & Water), among other senior positions.


Paul received his Chemistry degree from the University of Minnesota.

Paul Overbeck

Paul Overbeck

VP, Sales and Marketing

Celia is responsible for the Company’s active Research and Development activities. She is dedicated to the continual growth of the company and leads activities which continually evaluate and implement expanded applications of Mazzei’s products as well as improvements in performance of existing product uses.


Celia directs the Company’s Computational Fluid Dynamics projects which facilitate new product development and validate existing Mazzei products and systems. Publication and presentation of her research continues to educate audiences of international organizations such as IOA, ICWT and various regional associations.


Celia received her Bachelor of Science in Mathematics from Pepperdine University in Malibu, California.

Celia Mazzei

Celia (Mazzei) Cobar

VP, Research and Development