Zack Snyder was 37 in Dawn of the Dead when he played the character 'Commando at White House (uncredited)'.
That was over 20 years ago in 2004.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 58, and has starred in 10 movies in total, 9 of those since Dawn of the Dead was released.
In Dawn of the Dead, I think Zack Snyder looks: