Pignataro will be responsible for leading the UK new media team, overseeing all local functions, including content development, product development and sales and marketing.
She will report directly to Stefano Maruzzi, president of CondeNet International.
CondeNet International is appointing country managers in all its markets in a major restructure that is designed to accelerate the growth of its internet business.
As part of the restructure, Pignataro will need to appoint an executive producer to manage content and drive editorial strategy for all the various CondeNet UK websites, including Vogue.com.
Pignataro joined Conde Nast in January 2008 as strategy director of CondeNet International. She joined from Microsoft where she held the position of EMEA marcomm director.
Separately, Torstein Harildstad has been appointed director of international operations at CondeNet International.
This is another new role created in the restructure.
Harildstad will join the company on July 1 and will be responsible for technical development and innovation throughout the entire CondeNet International network.