He was Lieutenant General of the Polish Army, castellan of Kiev and Starost of Romanów (1774–1817) Married to Ludwika Sosnowska, once loved by Tadeusz Kościuszko. From 1774, he is Starost of Romanów (1774–1817) and armored regiment commander. Between 1786 and 1788, Head of the 12th Royal Regiment of Infantry, later the 5th Royal Regiment of Infantry.
Lieutenant General from 1792.
He supported the "Constitution of May 3, 1791", but hadn"t fought for its defense, saying he was sick in August He remained in service at Targowica at the time, assigned to the 4th Division de Kamieniec Podolski. But soon retrograded due to lack of knowledge of the service line.
From 1790 to 1795, he was Castellan of Kiev. He was one of the richest Polish magnates and pioneer of the country"s industrialization.
He assumed factories such as pottery factories in Korzec.
He was: Knight of the Order of Saint Hubert, Knight of the Order of Saint Stanislaus (1776), Prince Władysław Leon is himself Princess Zofia Sapieha"s paternal grandfather. And Princess Zofia is Queen Mathilde of Belgium"s maternal grandmother. So Prince Józef Aleksander Lubomirski is an 8th generation ancestor of Queen Mathilde of Belgium.
Member of the Great Sejm.