Tammy Zonker has been in professional fundraising and development for 30 years and has raised over a half a billion dollars for non-profits. She is now an author with her new book "Calling All Heroes" in which she imparts new strategies for fundraisers that lean more into a human centered approach.

<p>Tammy Zonker has been in professional fundraising and development for 30 years and has raised over a half a billion dollars for non-profits. She is now an author with her new book "Calling All Heroes" in which she imparts new strategies for fundraisers that lean more into a human centered approach.</p>