Slant named Christopher McGuire as vice president and general manager.

Commonground hired Brendan O'Malley as executive producer of both broadcast and digital across all agency business in New York.

Turn hired Leslie Lee as communications manager.

Operative hired Dave Villano as chief technology officer.

Rauxa promoted to Allison Yardeni to vice president, account services, David Janszen to account director and hired Nanci Muriello as an account director.

Jonathan Hall has been named president, consulting, North America, of Added Value, a WPP-owned marketing consultancy.

Allyse Slocum joined Collective as director, product marketing.

Centro hired Matt Davis as National vice president of platform sales and promoted Mike Olson to regional vice president, west.

Conde Nast Entertainment named Lesley Nadler as executive director of digital video sales.

Lowe Campbell Ewald hired Curtis Melville as executive creative director of the agency's Detroit office. He will report to Mark Simon, chief creative officer of Lowe Campbell Ewald, and work with all agency clients. Melville joins the agency from Team Detroit, where he served as executive vice president, executive creative director, responsible for Ford’s U.S. advertising communications, including traditional, digital, social, branded content and retail efforts. Prior to that, Melville worked at Ogilvy & Mather, Saatchi & Saatchi and Hal Riney, on brands like HP, Yahoo! and iShares.