UniWorld Group founder and CEO Byron Lewis Sr. is retiring and will be replaced by Monique L. Nelson. Mr. Lewis will become chairman emeritus of the agency, which is the longest-standing full-service multicultural advertising and communications agency in the U.S. Monique L. Nelson joined UWG in 2007 after a successful marketing career, both in the U.S. and internationally, at Motorola. Over the past few years, she has managed and grown UWG's integrated marketing, digital and branded entertainment departments. The Brooklyn-based agency, whose clients have included Ford, U.S. Marine Corps, AT&T and Burger King, was started by Mr. Lewis in 1969, when minorities were not represented in a positive manner in mainstream media. Mr. Lewis is also known for creating media properties such as the syndicated TV news program, America's Black Forum and the American Black Film Festival, which continues. UniWorld Group has a strategic alliance with WPP.Conde Nast Entertainment Group has named Sahar Elhabashi exec VP-chief operating officer. Prior to joining the company from her private consultancy firm, Ms. Elhabashi was chief operating officer at Discovery Networks International. She also held a variety of senior-level management roles at MTV Networks during her 15-year tenure there, most recently as exec VP-international strategy and digital media. Ms. Elhabashi began her career as a consultant for the Boston Consulting Group and Salomon Brothers, Inc. Michael Bassik has been promoted from Burson-Marsteller U.S. digital practice chair to CEO of Proof Integrated Communications, a full-service integrated marketing, communications and advertising agency formed by the combination of Young & Rubicam Brands' Burson-Marsteller's Marsteller advertising division and the PSBcreative advertising unit. Meanwhile, interim CEO Tony Telloni moves to a new role as managing director of brand integration and innovation in Burson-Marsteller's consumer and brand marketing practice. Mr. Bassik has been with Burson-Marsteller since April 2011 and will continue to lead the U.S. digital practice. Previously, he was senior VP at Global Strategy Group, where he established and managed its full-service digital public-affairs division.