Founder of the ensemble „Le Chardon”.
Study at the University of Oldenburg (modern flute).
Study at the Akademie für Alte Musik Bremen (traversflute and keyed flute with Marten Root.)
Masterclasses with Wilbert Hazelzet, Lisa Beznosiuk and Barthold Kuijken.
Hajo played in different orchestras, such as European Baroque Orchestra (UK), Utrechtse Consort (NL), The Northern Consort (NL), Haydn Sinfonietta Wien (AUS), etc..
Worked together with Simon Standage, Roy Goodman, Reinhard Goebel and Jos van Veldhoven.
Concerts in radio and TV as soloist and principal flautist in many European and non- European countries (Germany (NDR, SWR, Bayern 4, WDR, Radio Bremen), Spain, England, Italy, France, Belgium, Denmark, Romania, Chec Republic, Poland, Slovenia)..
Since 1994 construction of handcrafted traversflutes.
Besides his extensive work with his own orchestra, he took part on many recordings for radio stations or CDs as a soloist or as initiator.
He edits largely unknown baroque compositions and publishes them.
2007 Hajo founded his own CD company and CD lable.
Hajo owns some original flutes by Johann Gottlieb Streitwolf and anonymous flute builders from the early 19th century, he uses them for recording classical and romantical music. Baroque music he performs on a copy crafted by himself.
Recordings, CDs etc.:
1995 CD recording of Simon Heighes´ reconstruction of the St. Mark´s Passion by Bach.
1998 Recordings for Radio Bremen of largely unknown Sonatas composed by the Bach-pupil J.A. Scheibe.
Edition of a largely unknown collection of flute sonatas composed by Antoine Mahaut , 1999 at Broekmans en van Poppel in Amsterdam, 1997 CD recording of this collection.
1999: Rudolf Kelber´s CD recording of another reconstruction of the St. Mark’s Passion by Bach in Hamburg.
2000: recording of a Londoner Trio by Haydn at the WDR.
2003: chambermusic CD of wellknown and unknown music by Georg Phillipp Telemann among others with the title "Die Luft ertönt vom Schalle"
2007 CD with works by J.A. Scheibe and M. Clementi, together with Winfried Dahlke.
2007 CD Arias by J.S. Bach and G.F. Handel for counter and orchestra together with rediscovered concertos and doubleconcertos for flute, oboe and violin by Quantz, Fasch, Telemann. Soloists: Maarten Engeltjes counter, Hajo Wienroth traversflute, Mark Baigent oboe and Simon Standage violin.
With this CD production: live recording by NDR of a concert at the International Musikfest in Seelze broadcasted on 6. Juli 2007.
2008 CD with quartets by J.B. Viotti, together with Hajo Wienroth (keyed flute), Simon Standage (violin), Huw Daniel (viola) and Poppy Walshaw (cello).
2008 CD „Bleibt ihr Engel, bleibt bei mir...“ Cantatas and arias by J.S. Bach. Markus Brutscher tenor, Hajo Wienroth traversflute, Mark Baigent oboe.
Juni 2009 CD Opera at Esterhàza, Haydn Sinfonietta, Miah Persson, Christoph Genz.
April 2009 CD Haydn Trios and Divertimenti, Hajo Wienroth orig. keyed flute arround 1810, Simon Standage violin, Poppy Walshaw cello.
Jan 2010 CD Französische Suiten und Sonaten, Hajo Wienroth traversflute, Huw Daniel violin, Winfried Dahlke original harpsichord by Chr. Zell 1741
2011 CD Arias for Tenor with the Europeäische Barock Orchester Le Chardon and Andreas Post - Tenor. Worktitle: Ewigkeit, du machst mir Bange