New Orleans Saints coach Sean Payton expressed his astonishment on Twitter after Fox Sports reported Sunday that former Saints whistleblower Mike Cerullo now works for the NFL office. Cerullo, a former defensive assistant for the Saints, provided key evidence to the NFL to kick-start its bounty investigation against the team in 2011, and the Saints dismissed him as a "liar" with a grudge against them for being fired. Cerullo spent the past several years as Princeton's director of football operations before being hired by the league as a director of football administration this past summer. NFL spokesman Michael Signora said Cerullo works closely with senior vice president of football administration and club services Rod Graves on matters related to club administration and development, as well as supporting efforts involving college all-star games and project management. The Saints, however, are skeptical about Cerullo receiving a perceived reward from the league -- especially since they made it clear during the bounty investigation that they felt like he did a poor job in New Orleans.