Although he is predominately a rock singer, his dynamic vocal range and versatility lend well to powerful performances in nearly every style. His rising talent in recent years has made Hagen one of the best and most highly demanded rock vocalists, not only in southern Germany.
In early 2009, rock icon Joe Perry, lead guitarist and co-songwriter for the legendary American band AEROSMITH, reached out to Hagen after coming across a video online, and immediately hired him as lead singer for "Have Guitar Will Travel," the guitarist's solo album released in the US in October of that year. As a member of THE JOE PERRY PROJECT he has accompanied Perry and his band on several tours through the US, Canada and UK, performing with other rock giants such as Slash, Mötley Crüe and Bad Company.
In 2011 Hagen has also worked as the lead singer for KATMANDÜ, the swiss rock band around guitarist Mandy Meyer (Gotthard, Krokus, Asia, Cobra) and found himself amongst the top 30 (out of a supposed number of more than 300) candidates for the swiss hard rock act GOTTHARD, who were looking for a new lead singer after the tragical loss of their front man Steve Lee, probably one of the best rock voices in the last two decades.
Recently Hagen Grohe also provided backup vocals for renowned artists such as Bobby Kimball (Toto), Jimi Jamison (Survivor) and Chris de Burgh, and has worked on several productions as a studio singer.
Currently he's touring Germany with a Rock tribute band called ROXXBUSTERS, an outstanding group of professional musicians, and he's working on the debut original album of his band 21OCTAYNE, which he is also producing.