During her career, Roseline has done work for well-known brands such as Chanel, Bvlgari, Cartier, Gucci, Guess, Armani, FerrAgamo, Versace, Bottega Veneta, Louis Vuitton, Marc Jacobs, Chloe, agnès b., UPS and Qingdao Beer.
Westcor proposed to over 100 luxury designers in New York over the 2005/2006 Winter with unconfirmed interest from Hermès, Prada, Giorgio Armani, Barneys Co-Op, and BVLGARI.
The company works with various entities both in New York City & Seoul including the Grammy Awards, Emmy Awards, Montblanc, Quintessentially, Momentum Women, Bvlgari, Juicy Couture, People Magazine, and WebMD.