Yup. He ran the whole shipping industry all by hisself.
Okay, seriously, the problem when we only have one profile for every 3,000 people born since 1 AD is that a lot of people are missing from WikiTree. And that means that a lot of occupations are also missing from the occupations categories. (And, since only about 1/10 of the profiles on WikiTree have any categories at all, let alone occupations categories, that means that still more occupations are missing.)
What you might do is add the categorization tag to this thread, to attract the attention of the Categorization Project. They might have some better ideas for a new occupation category that would be a better fit for Frank's situation.