When Erin Corbin Meszaros joined the law firm Burr & Forman in June 2009 as chief marketing officer, the job description in her contract was written vaguely.

As it turned out, the lack of detail, whether prescient or unintended, is fitting. Meszaros, like most others in her field, digs daily into an increasingly full and diverse plate of tasks that have redefined the role of legal marketer.