Barely six months after joining up with WPP-owned 24/7 Real Media, or 24/7 Media as it’s known nowadays sources familiar with the matter confirm that Gary Lee has rejoined the fold as chief financial officer at McCann Worldgroup. Lee replaces Tara Comonte, who has spent the last two-plus years as global CFO at the agency. The returning senior exec originally joined McCann in fall of 2006 after serving in the same role at Ogilvy. We’ve been told by sources that no official start date has been set for Lee, but the incoming CFO will begin anew at McCann some time this month.