Her principal responsibilities include litigation and amicus curiae participation for AARP on a broad range of age discrimination and other employment issues. McCann has prepared numerous amicus curiae briefs on behalf of AARP in cases before the United States Supreme Court, and federal and state courts. Her publications include, "Age Discrimination in Employment" in The New Politics of Old Age Policy (2nd Edition) (with Cathy Ventrell-Monsees) and "The ADEA and the Eleventh Amendment," 2 Employee Rights and Employment Policy Journal 241 (1998).