Stefan Müller is a professor of linguistics at the Humboldt University of Berlin specializing in syntax, where he is the head of the German Grammar group (German: Arbeitsgruppe Sprachwissenschaft des Deutschen: Syntax).

Stefan Müller was born in Jena in 1968, majoring in computer science, linguistics, and computational linguistics at the Humboldt University.

[1] Many of his publications and the LaTeX code used to typeset them are open-access,[2][3][4][5][6] and he is one of the founders of the open access publisher Language Science Press.

[7][1] Müller's research focus is the empirical description of German and other Germanic languages and the theoretical modelling of these descriptive findings, the relation of this work to linguistic typology, and with the use of the Head-driven phrase structure grammar framework.

Because of the implications that typological findings have for different analyses of languages and linguistic phenomena, the description and analysis of non-Germanic languages also feature prominently in the programme - Müller himself works with Mandarin, Danish, Maltese, and Persian.