Hans Ulrich Engelmann (8 September 1921 in Darmstadt - 8 January 2011) was a German composer.Engelmann studied composition with Hermann Heiss and Wolfgang Fortner. He was a regular attendee of the Darmstadt International Summer Courses for New Music, and he was particularly affected by the twelve-tone classes of René Leibowitz (1948) and Ernst Krenek (1951), which helped him move from free atonality to serialism. Eventually, he would publish a history of the courses. In 1947, he began studying musicology with Gennrich Friedrich and Helmut Osthoff, earning a Ph.D in 1952. He also studied philosophy with Theodor Adorno, Max Horkheimer, Hans-Georg Gadamer.A brief marriage took him to Iceland from 1953-4, before returning to Darmstadt to work as the music adviser and composer for the Hessisches Landestheater for the next seven years. His next post was in the same capacity at the Nationaltheater Mannheim, where his tenure lasted from 1961-9. He also held the same position one more time at the Städtische Bühnen in Bonn from 1972-3. In 1969, he began teaching at the Frankfurt Musikhochschule, and he remained on the faculty there for seventeen years.