Hartmann left the
Legal Department and was appointed a
District Judge in 1991. In 1998, Hartmann was appointed as a Judge of the
Court of First Instance of the
High Court of Hong Kong. From 2010 to 2012, Hartmann primarily sat in the
Court of Appeal and heard two cases in the
Court of Final Appeal. In 2011, Hartmann was appointed as Chairman of the
Market Misconduct Tribunal and the Securities and Futures Appeals Tribunal for a three-year term from December 2011 to November 2014. In 2012, Hartmann retired from the
Court of Appeal. He was awarded the
Gold Bauhinia Star by the
Chief Executive. He continued to serve as a Non-Permanent Judge of the
Court of Final Appeal until 2016. In 2013, Hartmann sat as a
Deputy High Court Judge. In 2014, Hartmann was re-appointed as Chairman of the
Market Misconduct Tribunal and the Securities and Futures Appeals Tribunal for another three-year term until November 2017. In 2017, his appointment was extended for a further three-year term until November 2020. In 2018, Hartmann was appointed as Chairman and Commissioner of the Commission of Inquiry into the
Diaphragm Wall and Platform Slab Construction Works at the Hung Hom Station Extension under the Shatin to Central Link Project. In 2020, Hartmann's appointment as Chairman of the
Market Misconduct Tribunal and the Securities and Futures Appeals Tribunal was extended again for another three-year term until November 2023. In 2023, his term was further extended until November 2026. ==Novels==