Calumet Hires Former O’Neill Assistant Sisterson As Private Trainer At Keeneland by Paulick Report Staff|05.14.2018|4:01pm Nyquist jogs over the Churchill Downs oval during Derby week. Jack Sisterson is aboard lead pony Satire Jack Sisterson worked for trainer Doug O'Neill in 2010, and was a part of the team that prepared I'll Have Another for his Kentucky Derby and Preakness victories. On Monday, the former assistant told drf.com that he will be going out on his own as a private trainer for Calumet Farm. Sisterson expects to have horses in a new barn Calumet built at Keeneland on Rice Road. “I'm excited for the new venture,” said Sisterson. “They're going to give me about 50 horses to start. I'm looking forward to it and I like Keeneland. It's a beautiful place, and horses seem to love it there.” During his time in the University of Louisville's Equine Business Program, Sisterson started his racing career as a hotwalker for trainer Todd Pletcher. He also worked for Eddie Kenneally while in Louisville. Sisterson took on a brief stint as an account executive with Eaton Sales in late 2016, but returned to O'Neill's barn in 2017. “I'm so bummed to lose him, but as a friend, more than anything, I'm so excited and pumped for his future,” O'Neill said. “I have a feeling we're going to be knocking heads real soon.” Read more at drf.com.