The Directorate of Labour provides advice to employers. You can come to the Service Centre in Customs House for an interview with representatives of the labour administration or make an appointment online, see: https://vinnumalastofnun.is/umsokn-um-stuning-vegur-natturuhamfara-i-grindavik/employer-stuningur-til-idslu-salary . You can also contact Grindavík by phone, e.g. 420 1100, and request an office appointment.