H. Ummels is a distinctive voice in contemporary jazz arranging, known for their single, yet impactful, contribution to the jazz band repertoire. Their style is characterized by a sophisticated blend of traditional harmonic language and modern rhythmic sensibilities, reflecting a deep understanding of jazz history. While details of their background remain largely private, Ummels' work suggests a meticulous approach to orchestration, bringing fresh perspectives to established forms. Their singular arrangement has already left a notable mark, hinting at a promising future in the jazz arranging landscape.