The hire was announced at the recent BioWare's Fan Site Summit, according to Ask a Jedi. Hickman was previously the Studio Executive Producer for all of Mythic's MMOs. He'll step into the role left open by Gordon Walton, who left BioWare earlier this year.
With both BioWare and Mythic under the same parent company -- Electronic Arts -- it stands to reason that the two studios have a strong network and relationships that could lead to such transfers of personnel. We'll look forward to seeing what Jeff Hickman will bring to TOR as it progresses toward launch!