For his involvement in the aforementioned conflict, King Sigismund donated the estate Papouch in
Križevci County to George in July 1387. By that time, George was appointed Master of the stewards; he is mentioned in this capacity from July 1387 to July 1396. A single source from June 1388 also refers to Michael as an office-holder of this royal courtly position. For their former services to Louis I and Mary, George and Michael were granted the royal castle of
Szanda with its accessories – portions in
Surány, Szanda and Bolhádalja, along with a custom in the village
Guta – in
Nógrád County by Sigismund in November 1387. However, the king donated the fort to
John Pásztói three years later, around 1390. , owned by George Csetneki from 1396 onwards As a member of the royal court, George frequently escorted Sigismund to his military campaigns to the southern border. He fought in the
Hungarian–Ottoman War (1389–1396), he was present during the skirmishes against the Ottoman incursions in
Temesvár (present-day Timișoara,
Romania) in August 1392. It is plausible that George took part in the disastrous
Battle of Nicopolis in September 1396, where his second cousin Michael was killed. Returning Hungary, George was succeeded as Master of the stewards by Croatian count
Ivan Kurjaković sometime between September 1396 and February 1397. Despite that, he remained an influential member of the royal court. According to historian
Pál Engel, George Csetneki served as
ispán of Gömör County from 1397 until his death; he is first mentioned in this capacity in September 1399. He was granted the castle of Saskő (today ruins near
Šášovské Podhradie, Slovakia) from Sigismund in 1396. Because of his frequent travels with Sigismund,
Pope Boniface IX permitted him to use his own portable altar with clerical staff in his papal letter issued in June 1397, which was a significant privilege for a nobleman in the late 14th century. Upon his request, the pope also granted a privilege to collect
tithes to the parish church of Csetnek. With his funding, the building was reconstructed into a three-aisled church with rich
Gothic fresco decorations. Sometime after 1397, George lent a significant amount of money to lady Helena, who tried to ransom her husband,
Palatine Leustach Jolsvai from Turkish captivity. He took the castle of Hrussó (present-day ruins near
Hostie, Slovakia) as a pledge from the Jolsvai family on the occasion of the act. The ailing George Csetneki compiled his last
will and testament in Csetnek on 31 July 1402, before his relative, Palatine
Derek Bebek. In the document, George bequeathed his all purchased and pledged property to his wife and daughter Catherine, with the stipulation that after the death of both of them the estates would belong to his son, Sigismund (II) and his descendants. George died shortly thereafter. ==Descendants==