We have to be careful. You said, “looking to have the Government of Canada as a client”. When public office holders leave office, they can do whatever work they want to. The only thing that concerns me is communications with the federal government on subjects that are specified in the Lobbying Act.
Since former public office holders are not allowed to have such communications, that concerns me. Any communication by an employer or a company about a contract is not considered lobbying. However, if it's a communication to obtain a grant, that's lobbying. A former public office holder would be prohibited from having that kind of communication if it was about getting a grant.