For enquires concerning the competition, summer academy and festival concerts, please contact:
Peter Ouwerkerk, general manager
t: +31 (0)6 28426540 (only during the Festival)

Bank details:
IBAN NL77 INGB 0670 9604 38

Account holder: Stichting Internationaal Orgelconcours
The name and address of the bank is:
ING Bank N.V. 
Foreign Operations 
PO Box 1800 
1000 BV Amsterdam
Please choose for the transfer costs ’OUR’

KvK: 41223348

VAT: NL0027.83.873.B.01

For enquires concerning guesthouses for academy students during the Festival, please contact:
Maaike Wijbrandi, e: 

The address of the foundation:
Stichting Internationaal Orgelconcours
M. Vaumontlaan 1
NL-2101 EC Heemstede
The Netherlands

For questions about marketing and public relations:

Noreen van Holstein, Frijkje Bakker, Lalita de Goederen (STartPR), marketing and communication
E-mail: | |
Phone: +31 (0)6 575 66 899, +31 (0)6 200 529 66

For questions to the board of the Stichting Internationaal Orgelconcours (SIO), please contact the general manager.

For questions regarding the Müller Organ, Cavaillé-Coll organ, municipal organ recitals and visits to the organs, please contact:
Anton Pauw, City Council Haarlem
t: +31 (0)23 - 5113460

If you wish to receive the annual diary of the municipal organ concerts, please send a mail to: