Bull was born at Lübben (Spreewald), a small town in the marshy countryside to the south of Berlin. Hans-Joachim Bull (1906–1977), his father, was a lawyer and a judge whom Bull has described (in print) as "a self-confident choleric man with rigid principles, most of which dated back to the days of the kaiser...".[4] The family - Hans Peter Bull, his two-year-old sister, the parents and his grandmother - fled Lübben on 19 April 1945 as the Red army advanced from the east. Under Soviet Military Administration they were obliged to return to their point of departure, but two years later they made a successful escape attempt, now exchanging life in the Soviet occupation zone for the British occupation zone.[4] By 1947 they had ended up in Hamburg which is where Bull attended secondary school. After successfully completing his school career he had difficulty deciding whether he should pursue a career in journalism or in the law. In the end he opted for the law, although he continued to be actively involved in journalism as well. Between 1956 and 1960 he studied Jurisprudence at Hamburg, Marburg and at the Free University of Berlin. He also spent some time as an intern with Die Zeit, a weekly national newspaper published in Hamburg. He received his doctorate of law in 1963 for a piece of work concerned with "Verwaltung durch Maschinen. Rechtsprobleme der Technisierung der Verwaltung" ("Administration using machines. Legal problems with the mechanisation of administration"). Data protection challenges obsessed him long before the subject became mainstream.[5] In 1966 he passed his level 2 national law exams, which in principle opened the way to a career as a lawyer. Then, in 1972, Bull received his habilitation, a higher level academic qualification generally seen as a necessary prerequisite for a lifetime career as a university academic in Germany.[1][6]
Bull joined the Social Democratic Party ("Sozialdemokratische Partei Deutschlands" / SPD) in 1967.[6] That was the year in which he took over as chairman of the Regional Arbitration Commission ("Landesschiedskommission") in Hamburg.[4] He worked between 1973 and 1978 as a professor in Public Law at the University of Hamburg. Then, in 1978, he was offered and accepted a position as West Germany's first Federal Commissioner for Data Protection. Many of the concerns underlying the appointment were little understood by the political establishment, and during the next seven years Hans Peter Bull, whose own views were already thought through, did much to shape a role which over the next years provided a template for other European countries needing to find way to address abusive use of computer databases.[3][7] Between 1983 and 1988 he resumed his work as professor in Public Law at Hamburg. Then, in 1988, he was appointed Minister of the Interior in the SPD regional government of Schleswig-Holstein,[8] a position he retained till resigning at the start of 1995.[9] He then returned again to his academic role at the university, from which he retired in 2002.[4]
He served between 1997 and 2003 as a deputy chairman of the SPD's National Arbitration Copmmission ("Bundesschiedskommission").[10] He is also a member of the Hamburg-based Working Circle of Social Democratic Jurists ("Arbeitsgemeinschaft sozialdemokratischer Juristinnen und Juristen" / AsJ).
