Is there an advantage to be a Mason?

I have heard that it is an advantage to a person's career to be a Mason, is this true?

This is a commonly held viewpoint, but it is incorrect. Masons are under strict obligation, to not use their connections to obtain any personal advantage. There is of course, a general benefit that does come from being known as a Mason that is being known as 'a person of integrity, who can be relied upon.'