Mary Holzhausen has performed in venues across North America and Europe. In addition to her solo work, she is the flute Professor at Missouri Western State and Principal flutist in the Kinnor Philharmonic of Kansas City, Kansas City Civic Orchestra and a member of several chamber ensembles including Trio Sempre and the KC Woodwind Quintet.
In the summer of 2015, Mary was a winner in the National Flute Association Newly Published Music Competition. This led to a performance at the 2015 NFA Convention in Washington, D.C. In 2016 Mary collaborated with composer, Chen Yi. The outcome of this project is Memory for solo flute, a piece originally composed for solo violin. It is published by the Theodore Presser Co. Mary also collaborated with composer Simon Fink on his piece for solo flute, Elegy. This powerful piece was the inspiration for a YouTube video dealing with race relations, bigotry and human rights.