After graduating from secondary school, Leisegang attended Johann Wolfgang Goethe University (Frankfurt am Main) for several years.
In 1963 he met publisher and typographer Horst Heiderhoff,[1] together with whom he released the poetry series "Das Neuste Gedicht" ("The Newest Poem").
Already during his years at university, Leisegang worked a variety of different jobs: as a teaching assistant for an aesthetics course at the Werkkunstschule (College of Design) (in Offenbach) (1968–1960); as a lecturer for text and rhetoric at the Technical College for Industrial Advertising and Sales Promotion (in Kassel) (1968–1971); and as a freelancer in the editorial department “Art and Literature” for the Hessischer Rundfunk (Hessisch Broadcasting).
Unfortunately, his posit that one-sided political relationships would inevitably lead to foreseeable social and economic catastrophe, which drew from examples from South Africa, never came to fruition in the form of a paper, as his manuscript went missing during a move.
He held the seminar "Philosophical Aspects of Literature, Karl May: Ardistan and Dschinnistan" in the winter semester of 1972/73, which, in a certain sense, came to be his legacy.