Yes, a job offer is required to apply for an Iceland work visa. Iceland does not allow foreign nationals to apply for a work permit without an employment contract from an Icelandic employer. The employer starts the work permit application process, and after approval, you can apply for a residence permit. This ensures that you have a confirmed job and meet the skill needs of the Icelandic labor market. Without a job offer, you cannot apply for a work visa or move to Iceland for employment.