For work visa applications, you don't choose a provider; the Dutch government and its consulate/embassy determine which insurance is valid for a visa application. For short-stay visas, you'll need a policy from an EU-recognized insurer, such as those listed on the official European Commission website, which covers medical emergencies and repatriation up to €30,000. For long-term work visas, you must arrange Dutch-specific public health insurance (zorgverzekering) through a Dutch insurer once you arrive in the Netherlands.