Newark, Delaware
September 4, 2003

Strategic Diagnostics Inc., a leading provider of antibody products and analytical test kits for the food safety and water quality markets, today announced that the Board of Directors has appointed Matthew H. Knight as President and Chief Executive Officer. Mr. Knight has also been named to the Board of Directors. His employment is scheduled to commence September 15, 2003.

Prior to joining SDI, Mr. Knight spent 23 years at Nalco Chemical Company. He began his career in field sales in 1980, and advanced through a series of sales and marketing management positions over the next 15 years. In 1996, Mr. Knight became General Manager of Nalco's European operating group serving the water management needs of manufacturers, including the food, beverage and pharmaceutical industries. In 1998, he was promoted to General Manager of Nalco's largest water treatment business unit and in 2000 he was promoted to Group Vice President and President of the company's Industrial Division. Mr. Knight also served as Group Vice President, Sales Force Optimization, focused on development of sales and sales management processes for Nalco's global sales force. Mr. Knight is a graduate of Miami University of Ohio, with a B.A. in Chemistry.

George Brannon, Chief Operations Officer for Silliker Laboratories, said of Mr. Knight's appointment, "In the more than 10 years that I have known Matt, he has demonstrated an unwavering commitment to enhancing customer satisfaction through the delivery of value added programs and services. I'm sure he will bring the same customer focus to SDI."

Grover C. Wrenn, Chairman of the Board of Directors of SDI, commented, "We are pleased to welcome Matt to the senior management team at the Company. During our search, we focused on identifying an executive with strong all-around abilities and particular strengths in the areas of sales leadership and market development skill. We believe we have found those qualifications in Matt. We are confident in his abilities and look forward to working with him to further develop SDI as a market leader in our business categories.

"The Board also wishes to thank Art Koch for his service as interim CEO. Art's dedication to the Company and his leadership were vital to the Company over these past months. Art will be returning to his position as Chief Operating Officer and will continue to be an integral part of the senior management team."

Mr. Knight commented, "I am excited to join SDI as President and CEO. The Company has established itself as a leader in the agricultural and water quality marketplace by helping its customers respond to testing requirements with technology that is faster, more accurate, and more cost-effective to use. I look forward to expanding on these important customer benefits, and building our sales and marketing presence on a global scale."

SDI is a leading provider of biotechnology-based diagnostic tests for a broad range of agricultural, industrial, and water treatment applications. Through its antibody business, Strategic BioSolutions, Strategic Diagnostics also provides antibody and immunoreagent research and development services. SDI's test kits are produced in a variety of formats suitable for field and laboratory use, offering advantages of accuracy, cost-effectiveness, portability, and rapid response.

FeedChek(TM), TraitChek(TM), GMO QuickChek(TM), and GMOChek(TM) are pending trademarks for SDI.