Ruth Zehetmeier-Müller has earned her clients' top rating because of her team leader qualities and constant availability (JUVE 2011) as well as her attention to even minutiae which could be of relevance. Due to her dual qualifications as lawyer and tax consultant (including her professional work for E&Y legacy firms for several years) Ruth has built an impressive M&A and corporate practice over the last decades. In numerous transactions, cross-border and worldwide, as well as in multiple corporate reorganizations (e.g. transformations, spin-offs and mergers) the clients – being industrialists, strategic as well as private equity investors – have always appreciated Ruth's corporate, transaction and tax law knowledge combined with her hands-on approach and thorough understanding of economic issues, as well as Ruth's ability to understand and interpret financial data, in particular financial statements.

Ruth has close traditional ties to the US because of her client structure. With a focus on the business relations between the US and Germany Ruth is a contributing member of the Board of the German American Chamber of Commerce, Inc., New York.