In 1907, Jerzy Bojańczyk was authorized by his father, Wincenty, to run the brewery independently. He had previously been well-prepared for this position, in part thanks to his studies and brewing experience in Germany. After World War I, when the brewery was in decline, Jerzy Zygmunt made numerous attempts to save the enterprise, including in 1921, transforming the company into a joint-stock company, "Browar i Słodownia we Włocławek Spółka Akcyjna." The company's first management board included Jerzy Bojańczyk, Irena Haack (Jerzy's sister), and Bogusław Bacciarelli. Unfortunately, numerous recovery efforts and attempts by the company's main shareholders to salvage their ancestral legacy were unsuccessful, and the brewery was declared bankrupt in 1937. Jerzy Zygmunt Bojańczyk was not only an industrialist but also a well-known social activist. In the first half of the 1920s, he served periodically as vice-president of Włocławek, and in 1920 as mayor of Włocławek. In January 1925, he finalized the transfer of real estate from the city authorities to the TWW (Town Rowing Association) at the mouth of the Zgłowiączka River (3 Piwna Street), where within a year a rowing marina and other facilities were built, the construction costs of which he covered with his own funds. From 1919, he served as vice-president, and from 1932 as president of the Polish Association of Rowing Societies, and was also the chief judge of the rowing regattas at the Olympic Games in Amsterdam (1928) and Berlin (1936). After the end of World War II, he tried to get involved in the city's reconstruction and was elected chairman of the Municipal National Council in Włocławek. He was also active in the Włocławek Fire Department. He rose through the organizational ranks to become president of the association in 1926. He also worked for, among others, the Central Savings and Debt Relief Commission for Local Government, the District Committee for Physical Education and Military Training, the Włocławek branch of the Polish Red Cross, and the Włocławek branch of the "Sokół" Gymnastic Society. He donated his own funds to numerous organizations, including the Adam Mickiewicz Library. His community and local government work was recognized and awarded. In 1928, he was awarded the Officer's Cross of the Order of Polonia Restituta. Other decorations he received included the Gold Cross of Merit, the Gold Medal for Merit in Firefighting, the Gold State Sports Badge, and numerous others. After the end of World War II, he returned to work for the city government. He joined the Provisional National Council of Włocławek, served as chairman of the District Housing Commission, and as chairman of the Municipal National Council. He was married twice. In 1921, he married Florentyna Kleczkowska, and in 1945, after becoming a widower, he married Zofia Lewandowska. In 1991, in recognition of his services to Włocławek, the Włocławek City Council, by Resolution No. XVII/124/91 of March 30 of that year, changed the name of Gen. Karola Świerczewskiego Street to Jerzya Bojańczyka Street.