Tim is in charge of reaching things on high shelves. This is a really important job at Weta because there are a lot of high shelves in the Workshop, and if you don't do it right, all the dust can fall in your eyes. Fortunately he is blessed with supernatural powers which allow him to be really good at this; he has very long arms.
As the General Manager of Weta Limited, Tim also gets to sell and market all the wonderful art that the team in the Workshop create. As his son says; "Dad used to sell cheese, but now he's got a cool job".