Previously a planning director at Underwired Amaze, the digital and eCRM specialist, Anderson will work across all 23red clients including Bacardi, Martini and Change4Life.
Prior to joining Underwired Amaze he was a digital planner on Agency.com's BA account.
Earlier in his career he was head of customer insight and integrated planning at Saatchi & Saatchi.
Tom Huxtable, managing director at 23red, said: "This is another big building block in the development of our integrated offering. Peter's digital background will prove invaluable, as will his experience of integrated comms."