Director and effects supervisor Christopher Scollard, formerly of Blue Sky Studios, has joined the roster at Hornet, New York. ... John O'Callaghan and Danielle Amaral, both formerly of Attik/New York, have joined Charlex as senior designer and producer, respectively. ... Composer Bix has signed on with Santa Monica sound and music house Stimm√ľng. The Icelandic artist, whose credits include tracks for Earthlink and Infiniti spots, will remain based in Williamsburg, Brooklyn.