Interestingly, the Wall Street Journal is currently advertising for a Reporter, Commodity Enforcement, who "will be responsible for ferreting out bad behavior in commodities markets and gaining an inside track on government investigations".
I don't know if this is a role that already existed, but the WSJ seems to think there will be quite a lot happening in this space, which is a sign that there is only more regulation and enforcement to come.
The ideal person for the job is expected to be able to develop high-level sources, which "are essential in the murky world of commodities, where the line between market manipulation and legal practices is fuzzy".
Click here if you are interested in apply for this position, although I imagine that you will not be the most popular guy or girl in markets.