On 19 May 2017, it was announced that Steinhaus was promoted to referee in the top level of German men's football, the Bundesliga, for the 2017–18 season, making her the first female referee in the league's history.
Pada 19 Mei 2017, diumumkan bahwa Steinhaus dipromosikan menjadi wasit di level teratas sepakbola pria Jerman, Bundesliga, untuk musim 2017–18, menjadikannya wasit wanita pertama dalam sejarah liga.