[2][3] He went into law and banking rather coincidentally, as he said in interview around his 80th birthday; his father had recommended chemistry, while he was interested in music and theatre direction, but realised that he was not talented enough for these fields.

[6] During his time at the helm of Deutsche Bank, he advanced the internationalization of the organization and developed activities on the capital market.

[6][7] In 1999, Deutsche Bank bought the American Bankers Trust, initiating a global network.

[2][8] In an interview [de] published on 4 February 2002, Breuer doubted the creditworthiness of Leo Kirch.

[2][6][8] Breuer was interested in a consolidation of Germany as a financial marketplace, which earned him the nickname "Mr. Finanzplatz".