TBWA, Paris appointed McCann alums Eric Holden and Rémi Noel as its new creative directors. ... Saatchi & Saatchi, Los Angeles director of integrated production Damian Stevens has left the agency to form his own, yet-to-be-named production company. ... Agency.com hired ex-Digitas exec Stuart Hemmings as director of technology in its Chicago office. ... New York-based agency Magnani Caruso Dutton promoted Chris Valley to production director and James Warren to technology director. ... Jeff Bowman joined Raleigh, NC-based agency The Catevo Group as associate creative director. ... Partizan signed director Daniel Eskils to its roster. ... Long Beach, CA-based production company Damon Live Action signed director/cinematographer Doug Taub for exclusive U.S. spot representation. ... Hollywood-based agency Trailer Park promoted Matt Brubaker to president of its theatrical division. ... Veteran mixers Michael Marinelli and Steve Rosen launched audio post house Sonic Union in New York City. ... Dentsu America acquired New York-based agency mcgarrybowen. ... Publicis Groupe acquired Sao-Paulo-based digital agency Tribal.