Mark Weiher joined Esrock Partners as a senior copywriter.

Collective Media named Jennifer Morgan as chief marketing officer.

BzzAgent promoted Dave Dugan to president. He most recently served as senior vice president of strategy and partnerships.

Holly Henderson Mauer was named director, network distribution & service for Hallmark Channel. Mauer joins Hallmark Channel from TV Guide Networks where she most recently served as the director of affiliate sales.

Entertainment Publications hired Melissa Fisher as chief marketing officer. She most recently served as senior vice president of marketing & communications at Cox Target Media.

Walton|Isaacson hired Rochelle Newman-Carrasco to lead the agency's Hispanic marketing division.

Andy Bishop was named vice president of business development at Cellufun. Most recently, Bishop served as vice president of mobile entertainment at Sony Pictures Television.

Gary Scheiner joined Rosetta as chief creative officer. Scheiner comes to Rosetta from TBWA/Chiat/Day New York, where he had been the executive creative director of its WorldHealth unit.

AllOver Media tapped Chris Martin as west coast senior executive.

DoubleVerify added David Bell, former CEO and Chairman of the Interpublic Group of Companies, to its Board of Directors.