Simplify the following text for a Grade 8 native English-speaking person.
Original: After teaching in Tasmania for nine years , he migrated to New Zealand as a young man and worked for a time in Nelson , Christchurch , Dunedin and Invercargill .
Simplified: After teaching in Tasmania for nine years , he came to New Zealand as a young man and worked for a time in Nelson , Christchurch , Dunedin and Invercargill .