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About Us

Founded in 1969, American Vanguard has grown from a regional contract manufacturer of agricultural chemicals to a fully integrated producer of branded specialty products. As a leader in its segment of the market, American Vanguard is a lean, focused company led by some of the most experienced executives in the industry. This trusted and responsive team of experts excels in purchasing, sales and marketing, manufacturing, regulatory compliance, financial management and customer service. Such skillful leadership has developed a proven acquisition and product development model for American Vanguard with diverse niche market positions, world-class manufacturing capabilities and strong international growth that will continue to enhance agricultural productivity and safeguard public health. A full description of the product portfolio as well as our manufacturing and product registration capabilities can be found at

Executive Team

Eric Wintemute, American Vanguard Corporation's Chairman and Chief Executive Officer was elected to these posts in mid-1994. Mr. Wintemute had joined the company in January 1994 as Executive Vice President, Chief Operating Officer, and a member of the Board of Directors following American Vanguard's acquisition of GemChem Inc., a national and international chemical distribution company he co-founded in 1991. From 1977 to 1982, he worked for AMVAC in a variety of sales, purchasing, and production control capacities. As a Vice President and Director of R.W. Greeff & Co. from 1982 to 1991, Mr. Wintemute oversaw the national and international distribution of key AMVAC chemical products. Mr. Wintemute holds a Bachelors of Science in Economics from the University of California, San Diego.

Ulrich (Bob) Trogele, PhD, is the Chief Operating Officer and Executive Vice President of AMVAC Chemical Corporation. In this position, Dr. Trogele is focused on growing the business across multiple product lines and geographies, achieving greater profitability and establishing a pipeline of future opportunities through innovation and strategic relationships. As COO, he oversees sales, marketing, and business development on a global basis…driving value creation for all stakeholders, customers, employees and community through technology, alliances and market access expansion.
Mr. Trogele has worked in positions of increasing responsibility within the agribusiness sectors of agrichemicals, biotechnology and plant nutrition, culminating with ten years at FMC Corporation, where he recently served as President – Asia Pacific and previously as North American Area Director of their agricultural solutions business.  He has built an extensive network of relationships with customers and industry peers throughout the globe in North America, Europe and Asia.

In addition to his early career as a professional basketball player, Bob holds an MBA and PhD from the University of Goettingen. He is fluent in both German and French; and since 1997 has served as a professor of international business at the Berlin University, Germany, School of Economics and Law, where he teaches Global Business & Management to international MBA students.

David T. Johnson has served as Chief Financial Offer of the Company since March 7, 2008. Mr. Johnson served as Finance Director for Amcor Flexibles UK Ltd., a five hundred million dollar manufacturer of decorative packaging and a subsidiary of Amcor, a multibillion dollar corporation based in Australia from June 2003 through March 2008. Prior to that he served as Vice President of Finance for Sterer Engineering, a subsidiary of Eaton Aerospace, an eight billion dollar Cleveland based multinational company from April 2001 through June 2003.

Timothy J. Donnelly serves as Vice President, General Counsel, Chief Administrative Officer and Corporate Secretary. Most recently, he served as Vice President, General Counsel and Secretary at DDi Corp. (Nasdaq: DDIC), a publicly held printed circuit board manufacturer, since June 2000. Mr. Donnelly managed a broad array of legal responsibilities including business plan and strategy development, SEC filings, M&A, Sarbanes-Oxely compliance, corporate governance issues, securities offerings and private placements, as well as negotiations with the EPA. From 1991 – 2000, he served as Assistant General Counsel at Rockwell International Corporation where he handled M&A, various licensing agreements and corporate litigation for the company. From 1986 — 1990, Mr. Donnelly was an Associate with the law firm Latham & Watkins where his responsibilities included corporate transactional work and civil litigation. Mr. Donnelly holds a Bachelor of Arts Degree in English from John Carroll University and a Juris Doctor from Northwestern University Law School.

William A. Kuser, Director of Investor Relations and Corporate Communications, joins American Vanguard from Chemtura Corporation (NYSE: CEM) where he held roles in corporate strategy and investor realtions over the last 12 years. His extensive career in the chemical industry includes prior experience in financial analysis, marketing, operations and business management. Bill earned his undergraduate B.A. degree in Economics from Rutgers University in 1973 and his MBA from the University of Pennsylvania-Wharton Graduate School in 1975.