If the individual is hired under a service contract to provide advice, it's a service contract. The federal government has a number of these contracts, and it isn't lobbying.
Incidentally, I recently met with a number of groups and gave them advice. These groups included advisory and consultative groups. Although these people are part of the groups at the request of a particular minister, their activities and communications could be seen as benefiting their company. After all, their company pays them to be there. Without their company or their expertise, they wouldn't be there. They must see it as communicating.