Heitzler studied at the Slade School in London before receiving an MFA in studio art from Hunter College in New York in 2000.
Artists who curated or appeared in exhibitions at Champion Fine Art included Sylvie Fleury, Vincent Szarek, Bjorn Copeland, Carol Bove, Allyson Vieira, Alex Kwartler, Steven Parrino, Lizzi Bougatsos, Mai-Thu Perret, Josh Smith, Seth Price, Kelley Walker, Emily Sundblad, Monique Van Genderen, Valentin Carron, Gardar Eide Einarsson, Huma Bhabha, Nancy Shaver, Aleksandra Mir, Roe Ethridge, Fia Backström, Jessica Jackson Hutchins, Matt Johnson, Hannah Greely, Kalup Linzy, Shana Lutker, Stephen Rhodes, Jonas Wood, Shio Kusaka, Nate Lowman, Tony Matelli, Bert Rodriguez, Mary Weatherford, Charles Irvin, Ellen Altfest, Tyson Reeder, Scott Reeder, Katherine Bernhardt, Brian Bress, Alix Lambert, John Armleder, Cyprien Gaillard, Jan Groover, Jordan Wolfson, John Tremblay, Rose Kallal, Jonah Freeman, Chuck Nanney, Adam McEwen, Peter Coffin, Craig Kalpakjian, Stephen Shore, Joe Scanlan, James Welling, Eric Wesley, Carey Young, Walead Beshty, Anna Sew Hoy, Carter Mull and Adam Putnam.
In 2005 Heitzler, along with Wiegmann and Justin Beal, opened Mandrake, a bar and cocktail lounge situated in the middle of the La Cienega Boulevard gallery district in Los Angeles.
The back room at Mandrake, originally intended for use as a gallery space, opened with an exhibition curated by Darren Bader and Jesse Willenbring.
The bar also houses art works by Raymond Pettibon, Allen Ruppersberg, Andrea Büttner, Garth Weiser, Aleksandra Mir, Cyprien Gaillard, and Nate Lowman.