RON LAWNER, vice chairman, global chief creative officer at Arnold Worldwide, is leaving the agency at the end of the year.

Visible World has promoted TARA WALPERT from executive vice president and general manager to president.

Sigma Group has named SHANNON MORRIS as president. She was formerly vice president and managing director.

ANGELA CANNON has been promoted to director of affiliate marketing, eastern region, up from senior affiliate marketing manager, at Gospel Music Channel.

TONY NETHERCUTT has joined AdMob as vice president of advertising sales. He most recently served as vice president of sales for YouTube.

JON ALSOP was promoted to vice president of sales for Advertising.com.

Ames Scullin O’Haire has named JIM HURD as media director. Prior to joining the agency, Hurd spent nine-years with Cooper / TraverRohrback as media director.

CRAIG INDECK joined PJA Advertising and Marketing as director of traffic. Before joining PJA, Indeck spent three years with Connelly Partners as the agency’s traffic manager. In addition, SCOTT SILVERMAN was named accounting manager.

RDW Group hired PETER MARINO as director of research.

The VIA Group promoted MATT CARTER and CHRISTINE MALIK from account supervisors to client strategists. ERIN CUNNINGHAM was hired as an account manager. Prior to joining VIA, Cunningham was a retail business planner at Cole Haan.