Andrew L. "Andy" Stern (born November 22, 1950), is the former president of the 2.2 million-member Service Employees International Union (SEIU), the fastest-growing union in the Americas. SEIU is the second largest union in the United States and Canada after the National Education Association. Stern was elected in 1996 to succeed John Sweeney (John Sweeney (labor leader)). Stern is intent upon influencing federal legislation that helps revitalize the labor movement through universal health care, expanding union ranks via the Employee Free Choice Act , stronger regulations on business, profit sharing for employees, and higher taxes, efforts consistent with a effort to improve the lives of workers .

For his talent at recruiting new members, Stern has been described as the "most important labor boss in America". Stern is unapologetic about targeting private equity firms, shaming business leaders, and competing to build SEIUs membership: ?We like to say: We use the power of persuasion first. If it doesnt work, we try the persuasion of power?. The share of workers belonging to a union in 2008 showed the largest annual growth rate since the first report in 1983. Growth in SEIU in 2008?88,926 members--accounted for nearly 21 percent of the national union membership growth.

Stern also currently holds an appointment as the Alice B. Grant Labor Leader in Residence at the Cornell University School of Industrial and Labor Relations.