Director/photographer Matthew Rolston and HSI have parted ways. Rolston had been repped out of HSI satellite Venus and is currently exploring his options. ... Santa Ana's DGWB Advertising & Communications promoted co-creative directors, Dave Swartz and John Zegowitz. They will now oversee all client creative campaigns. ... Creative director/composer Augustus Skinner, who helped to establish London's Amber Music, opened his own music company, Crispin Thump, in New York. ... Filmmaker Bob Giraldi joined with Mexico City-based Catatonia Films to create Catatonia Giraldi, a production/media company representing international directors. New York-based Katya Meyer is managing director; Debbie Merlin is executive producer. ... New York's Company X has joined forces with editor Bruce Ashley, whose editing credits include projects for Guinness, Clinique and the NBA. ... Austin's GSD&M hired Chuck Meehan, previously of Los Angeles based David & Goliath, as creative director. ... Art director Ron Lim, previously of San Francisco's Foote, Cone & Belding, has joined ATTIK's San Francisco office as associate creative director. ... Editor Bryan Wetzel, previously of P.S. 260, has signed with New York's Bluerock. ... Sausalito's Butler, Shine, Stern & Partners acquired Zimmerman Design Inc. (ZDI) of San Francisco. ... New York sound company Headroom Digital Audio hired master mixer Scott McIntosh, previously of McHale Barone.