Darcy Antonellis is leaving Warner Bros. after 15 years to become CEO of Vubiquity, a provider of multiplatform video services to media companies and service providers.

Antonellis starts at Vubiquity on Jan. 2, 2014, and also will join the privately held company’s board. She replaces Ramu Potarazu, who stepped down as CEO in March to join investor Columbia Capital as a venture partner; he currently serves as vice chairman of Vubiquity, which changed its name from Avail-TVN earlier this year.

Currently, Antonellis is president of technical operations and chief technology officer of Warner Bros. Entertainment, a position she’s held since 2008. A winner of three technical Emmys, she joined Warner Bros. in 1998 as senior VP of distribution technologies and operations after working at CBS and WTTG, the Fox affiliate in Washington, D.C.

At Warners, she led the creation of Digital End-to-End (DETE), the first studio digital supply chain, which let the company rapidly expand digital distribution partnerships for movies and TV. Among her other accomplishments, Antonellis also oversaw development of a fully digital syndication distribution system for delivering HD content to cable and broadcast partners.

“As a visionary leader with deep understanding of the media industry, she is a great choice to lead Vubiquity into its next stage of growth, to meet the needs of our customers, employees and investors,” Phil Herget, Vubiquity chairman and partner at Columbia Capital, said in a statement.

Commented Antonellis, “In a fast-moving and constantly changing industry, Vubiquity has long distinguished itself as a leader in the areas of technology, strategy and marketing. And with a greater number of content and service providers looking for leadership as multiplatform viewing becomes the norm, we have an opportunity to bring increased value to our customer base as we extend our market position.”

Antonellis will be based at Vubiquity’s Sherman Oaks, Calif., office. The company, whose headquarters is in Reston, Va., provides services including VOD encoding, file management and delivery, as well as multiplatform services that support TV Everywhere and subscription VOD offerings for connected devices.

Vubiquity investors include The Carlyle Group, Columbia Capital, Novak Biddle Venture Partners, Pioneer Venture Partners and Valhalla Partners.