Holden Sill Assistant Director of Leadership Annual Giving Contact Email Holden Sill About Holden Sill joins Harris as the Assistant Director of Leadership Annual Giving. In this role, he will focus on qualifying, cultivating, soliciting, and stewarding Harris alumni. Holden brings experience from his previous position as a Development Associate at the University of Chicago Booth School of Business, where he was instrumental in supporting major gift officers and advancing principal gift strategies. Prior to Booth, he led successful fundraising initiatives at The Resurrection Project and revitalized donor management processes at LSA Family Health Services. Holden holds a BA in Political Science and Public Administration from Winona State University. He resides in Chicago with his girlfriend and their dog, Bodega.