McCann Erickson will handle advertising; Universal McCann takes on media duties.
McCann's brief is to contemporarise the Acer brand and build on its "empowering technology" proposition.
The Taiwanese company became the world's third largest PC maker when it acquired Gateway for US$710 million in August last year.
Ingrouille continued: "McCann is still dogged by an unfounded reputation that we're a packaged goods agency. This win proves, yet again, that this isn't the case. We have Microsoft, Intel and now Acer.