Modernista, the independent Boston-based agency, has opened an agency in Amsterdam to service its longtime client Hummer across Europe and the Middle East. Nick Simmonds, formerly of Wieden + Kennedy Amsterdam, has signed on as managing director of the new office, and founders and ECDs Lance Jensen and Gary Koepke are in the process of hiring an executive creative director. ... United London chairman Steve Henry has joined TBWA/London as executive creative director. ... Compulsive Pictures in New York has signed two directors, Laura Murphy and Magnus Reed. Murphy will be repped worldwide by Compulsive, while Reed's representation is exclusively North American. ... Click 3x has hired Steve Tozzi, formerly of Pure, as creative director. ... Crush Editorial in Santa Monica has hired Curtis Smith as staff editor. ... Director Jake Schreier, formerly of Plum Productions, has signed to Park Pictures. ... FilmCore, with offices in New York , Santa Monica and San Francisco, has formed an exclusive partnership with The Quarry in London. The Quarry will refer U.S. projects to FilmCore exclusively and FilmCore will provide services and facilities when The Quarry's staff is working in the U.S. ... Mad River/Dallas has become independent, relaunching itself as Willow Street Editorial. The company has also allied itself with music house The Lodge. ... Crispin Porter + Bogusky has hired Jill Kershaw, formerly executive producer at Rocket Surgery, as executive integrated producer of radio and audio. ... 615 Music in L.A. has named Shauna Krikorian, founder of music management company SLK Entertainment, to the newly-created post of music director.