Complex sentence: Outside of Sweden, Willén has worked with major orchestras in Norway, Denmark and Finland and outside of Scandinavia, he has conducted the Royal Scottish National Orchestra and BBC Scottish Symphony Orchestra, the National Symphony Orchestra of Ireland, and orchestras in the Netherlands and Germany.
Split into simpler sentences: Outside of Sweden, Willén worked with major orchestras in Norway, Denmark and Finland. And outside of Scandinavia, he conducted the Royal Scottish National Orchestra and BBC Scottish Symphony Orchestra, the National Symphony Orchestra of Ireland, and orchestras in the Netherlands and Germany.