De Valk Leadership Company, based in the Netherlands and Ireland, is founded by Guido de Valk. He is a Medical Doctor/General Practitioner and an experienced manager. Read more about Guido de Valk. Basic contact form Please include your name, email, phone number and your question and we will get back to you quickly. Name* First Last Email PhoneYour question or remarkPhoneThis field is for validation purposes and should be left unchanged.