Henn started his career with
Hindu Club in
Argentina. In 2005, he was signed by the top French club
Stade Francais who compete in the
Top 14. After one season, in 2006, he joined
US Montauban who play in the
Top 14, the first level of domestic competition in France. He was signed by
CA Brive. After 5 seasons, he left Brive and he signed for
Limgoes for the 2013-14 season, competing in
Federale 1, the third level of domestic competition in France. On 10 July 2014, Henn was signed to the English club
London Welsh who compete in the
Aviva Premiership from the 2014-15 season. ==References==