He acted as manager of a youth association in Berlin from 1968 to 1970 and earned his university entrance qualifications through the so-called second education route from 1970 to 1972.
The DHM became the core of his professional activity, where he contributed significantly as department director and senior member of the management in the years form 1991 to 2000 and from 2002 to 2012 for the build-up of the new national museum.
He was responsible for the politically important committee work at this time and for the external representation of the museum, working in such committees and advisory boards as the German-French expert commission for the repatriation of cultural assets that had been displaced in the war as well as the Federal Commission for Memorial Museums.
[1] In taking this position in 2010, the new President highlighted the role of ICOM as "a global player, representing common ethical and professional values all over the world".
He stated that "the work of committees has created a worldwide forum for international, transcontinental and intercultural dialogue.
In presenting ourselves to a wider public, we must continue to increase the awareness of our issues and highlight the significance of museums as sites of social encounter".
[2] In 2013, Prof. Dr Hans-Martin Hinz was elected for a second three-year mandate during ICOM’s 28th General Assembly in Rio de Janeiro, Brazil.
He pointed out that "The majority of ICOM members are in Europe and it’s very important that we also address the needs of museum professionals in developing countries.
In Germany, Hinz was chairperson of the scientific advisory board of the Stiftung Stadtmuseum Berlin from 2004 to 2008, chairperson of the Association of Historical Research Institutions (AHF) in Munich from 2003 to 2012 and Executive Board member of the Society for Geography in Berlin from 2007 to 2019.