As head of the Finance Department, Haberhauer participated in the organization of the 1896 millennium celebrations, which commemorated the anniversary of the Hungarian conquest of the Carpathian Basin. As a result, he was granted Knight Cross of the Order of Franz Joseph by the eponymous monarch on 10 October 1896. After the election of József Márkus as Mayor, Haberhauer was promoted to Second Deputy Mayor on 9 December 1896, obtaining 217 of the 278 votes. Lord Mayor Károly Ráth praised Haberhauer's "excellent administrative skills and other excellent qualities", when took the office.