In 1986 he started his apprenticeship at the Sueddeutsche Orgelpfeifenfabrik Roland Killinger to become a pipe maker with educational at the Oscar Walcker Schule in Ludwigsburg, Germany. In 1989 he worked at the Killinger - reed making and voicing. Since 1995 workshop manager at Killinger. 2002 - CEO of KILLINGER PFEIFEN FREIBERG

Andrew joined Harrison & Harrison as an apprentice in 1994. At the age of 22 he became London Tuner. In 2012 Andrew has been responsible for the musical success of many projects, including the Royal Festival Hall and King’s College, Cambridge. In addition to his work at H & H, Andrew is an accomplished organist and choir trainer, currently holding the posts of Director of Music at St Michael & All Angels, Croydon, and Director of the chamber choir, Amici Coro.

Catarina Grönlund fourth generation of organbuilders in the Grönlund family and Company. She has since 1980 worked as organbuilder. Now she is managing director and also works with design, technical drawing, service and in the workshop.

Studied « history of art and musicology » (master thesis: “La facture d’orgues liégeoise au XVIII siècle: la dynastie des Le Picard et Robustelly” Musical studies at the Conservatoire Royal de Musique de Liège. Working since 1984 in the family business. Publisher of the ISO Journal and ISO Treasurer since 2006

After studies in Sacred Music and training as an organ builder, Matthias Wirth worked as a voicer for the companies Rieger (Schwarzach/Austria) and Seifert (Kevelaer/Germany). Since 2018 he has been working as a freelance voicer for various companies in Europe. He also specialises in marketing, strategy and communication for small handcraft businesses, non-profit organisations and local politics. He loves to explore the big lines and the details in organ building and music. Therefore, it is a special pleasure for him to bring all these skills together in the activity as editor of the ISO Journal.

Didier Grassins interest in organbulding began in the shadow of the famous clicquot organ of Poitiers, France, his native town. His professional path took him through several years as freelance designer, working for many major european and american firms before joining casavant frères for eight years. In 2011, he joined the Noack Organ Co. in Georgetown, MA, taking its leadership in 2015 at the retirement of Fritz Noack.

Markus began his apprenticeship at Rieger-Orgelbau in 1990 and worked there as an organ builder and intonator until 2010. He then became self-employed as a freelance intonator and worked for various companies. Since 2015 he has been the freelance intonator at the Wegscheider organ building workshop in Dresden. Markus has been a member of ISO since 2016.

After graduating as an architect and practicing the profession for several years in the UK, Michela Ruffatti joined Fratelli Ruffatti organbuilders, the family firm based in Padova, Italy, in 2004. Along with the principals of the firm, she works as both technical and visual designer, and she supervises the construction and installations of new organs and the restoration of historical organs. She is currently president of the Italian Association of Organbuilders.

Alongside viola and organ studies, Thomas first trained as a cabinet maker in Lausanne’s Technical School before starting an organ building apprenticeship with La Manufacture d’orgues St-Martin, also in Switzerland. After that, he had the opportunity to be involved in several projects mainly in England but also in Italy, New Zealand, Japan and of course Switzerland, where he has worked for Orgelbau Goll Luzern since 2015. Throughout his career, he has had the privilege to work on a variety of jobs, ranging from woodwork, CNC machining, to organ maintenance and tonal finishing, the latter now being his main fields.