Newman will join executive creative directors John Norman and the recently appointed Jeff Kling to complete the management team at W&K Amsterdam.
In his previous role, Newman led the agency's BMW account, helping BMW evolve their brand positioning in the US market.
Prior to GSD&M, Newman was senior vice-president and group account director at McKinney-Silver on the Audi of America account.
Newman also oversaw the BMW account at Fallon before joining GSD&M, and was part of the team that developed the acclaimed BMW Films campaign.
Dave Luhr, chief operating officer for W+K, said: "I have been following Lee's career for the last two years, always hoping we could find the right opportunity for him. And that opportunity has arrived in Amsterdam.
"Lee is a rare agency leader. He is intelligent, motivating and, most importantly, creative. His agency and account experience speak of his excellence. I personally can't wait to see what comes from the combination of Lee, John and Jeff."
Newman said: "Historically, the work that's come out of the Amsterdam office has been exceptional and I'm looking forward to partnering with John Norman and Jeff Kling to continue that success.
"Their work speaks for itself and in getting to know them it seems like the three of us will balance each other very well. And I'm sure we'll have a little fun along the way."
Newman will join the agency on April 28.