Information Technology Industry Council hires Josh Kallmer, ex-Crowell & Moring, as senior vice president-global policy ... Syniverse promotes Steve Gray to permanent president-CEO ... Nexstar names Mark Overstreet, who was at Florida TV stations WTLV Jacksonville and WJXX Orange Park, as vice president-general manager, WZDX Huntsville, Alabama, and associated digital operations ... Telltale Games adds to board John Riccitiello, Unity Technologies, and Jon Feltheimer, Lionsgate, which also is investing in the company.