In 1984 Bernd Tischler finished his studies of urban planning at the University of Dortmund. After the clerkship at the District Government of Cologne and the Great State examination for higher technical management services in 1987, he worked from 1987 to 1989 as deputy chief officer in the office of urban affairs and business development in Dormagen.
In 1989 he was appointed as department manager for environmental planning in Bottrop. He was then head officer of land-use planning and deputy director of the planning office before he was promoted to director of the city planning office in 1996. In 2004 he was appointed executive director of the department of buildings and planning.
Since 2009 Mr Tischler heads the planning commission of the Ruhr Regional Association. In the 2009 municipal elections he was elected mayor of the city of Bottrop and re-elected by a large majority in 2014 as well as 2020.