Diamond Foods, a packaged food company, has appointed Celeste Clark, a retired senior executive with Kellogg Company, to its board of directors. She also will serve on the nominating and governance committee.

Clark is a recently retired senior executive of Kellogg Company, where she led global public policy and external affairs and served as chief sustainability officer. In her nearly 35 years with Kellogg Company, Clark was responsible for global health policy, nutrition, and regulatory science globally.

She led the global nutrition team’s work with the company’s research, quality and technology group and the business units to strengthen the nutritional value of products offered with a focus on both innovation and renovation. In addition to her scientific and regulatory experience, Clark was also responsible for Kellogg Company’s global communications and corporate social responsibility.