[muzani]

Put it in the contract. Get a lawyer to double check. Make it clear to them as well. I usually triple check the anti-competition and the IP clauses in all contracts.

This kind of thing happens all the time. People who are experts in a field get hired by competitors in the same field.

[CyberFonic]

Agree with your suggestion, but the cost of lawyers is probably too much in light of it only being 16 hours work.