I believe you mean francophone employees.
Yes, they're definitely uncomfortable, not necessarily because they lack the opportunity, since they often have occasion to speak it, but as a result of a lack of training. In many cases, the technical aspect of a subject may become a handicap from a performance standpoint. In meetings, people don't want to look bad in front of senior management, for many reasons, whether it be for the purposes of their performance evaluation or obtaining an acting or higher-level position.
There's definitely an insecurity in that regard among both anglophones and francophones, and insecurity is omnipresent across Canada when it comes to bilingualism.