A person who works in kitchens can be called a Chef, or Cook. Someone who designs websites can be called a Web Developer or Web Designer.
What would you call a person who runs a non-profit/community service organization?
My first thoughts were Philanthropist or Humanitarian, but those both seem a little large scale for my tastes and may come off as boastful. On the other end is Volunteer, but that doesn't seem to convey the fact that the person actually runs the organization.
The actual title is Executive Director but saying "David is an Executive Director" doesn't convey the non-profit nature of the organization
I'm looking for a single word that represents someone who is in charge of a simple non-profit/charitable organization that doesn't sound too "big."