Katie Senderowitz has been promoted to vice president, management supervisor from account supervisor in Arnold Worldwide's Brand Experience Group.

Adap.tv hired Toby Gabriner as president. Most recently, he was president of Tribal Fusion.

Digitas hired Ashley Swartz as senior vice president of the agency's New York office. She will be leading Samsung initiatives including all Samsung.com work. Swartz joins Digitas from Ag8, Ltd where she was the North American Interim CEO.

Tremor Media hired Carrie Hamerslag as a regional sales manager based in New York. Previously, Hamerslag was an account executive at Nabbr.com.

Dentsu Holdings USA named David Cameron to the newly created post of chief of strategic development. Previously, Cameron was managing partner of mcgarrybowen's New York office, where he led the Marriott account. Dentsu acquired mcgarrybowen in 2008.

David&Goliath appointed Israel Diaz as executive creative director of its newly founded Toronto office. Diaz will be responsible for heading up creative duties for Kia's Canadian advertising. Diaz joins D&G Toronto from Leo Burnett Toronto where he spent five years as senior vice president, creative director and managing partner.

Touch DDB hired Scott Walker as deputy creative director and Andrew Godley as business director.

Michael Knott has rejoined Draftfcb San Francisco as senior vice president, media director. Knott joins the agency from Venables Bell & Partners, where he served as director of communications strategy.

Mediaedge:cia China named Michelle Ko as president. Ko joins the agency from the GroupM Regional Aspire team responsible for the training and development of the GroupM agencies in Greater China. In addition, Tommy Au was named general manager of MEC Shanghai. Au joins from OMD Shanghai where he was business director.

Craig Daitch joined Converseon as senior vice president of Activation. He previously worked at Measure 2X, the joint venture between Rapp Collins and Alcone Marketing.