Jeff Wigand is a former tobacco executive who became a whistleblower in the 1990s. He worked for Brown & Williamson, a major tobacco company, where he revealed that the industry knowingly manipulated the levels of nicotine in cigarettes to enhance addiction. His disclosures led to significant public and legal scrutiny of the tobacco industry. Wigand's testimony was pivotal in the landmark 1998 Master Settlement Agreement, which resulted in major changes in how tobacco companies operate in the United States. His story was later depicted in the film The Insider, highlighting the ethical dilemmas faced by those within the industry.