Professional Air Traffic Controllers Organization (PATCO) is an independent labor union in the United States. It is certified by the NLRB and currently represents air traffic controllers who work in private sector control towers, and is actively organizing controllers nationwide. PATCO signed an Alliance Agreement with the Teamsters Airline Division on October 15, 2008. The union also includes hundreds of former controllers fired during the 1981 strike by the previous union of the same name. The new PATCO uses the original union's logo to strengthen its claim to the PATCO lineage.