Nissan Motor has signed a multi-year agreement with Omnicom Group for communications, advertising, marketing, media, promotions and digital services.

The global deal will be managed by Nissan United, a new, multi disciplinary team of managers based in New York.

"Brand power is a core pillar of our Nissan Power 88 strategic plan and is essential for our growth," said Roel de Vries, Nissan's global head of marketing, brand and communications. "In Omnicom, we have a strong partner and the new, industry-changing Nissan United structure is a perfect setup to deliver on our promise of innovation and excitement for everyone."

Omnicom named Jon Castle as president of Nissan United, which will include heads of various expert agencies in the group. "We are thrilled to extend our partnership with Nissan and remain dedicated to bringing together the best Omnicom resources around the world to continue to strengthen the Nissan brand," said Castle.

The team will manage, direct and align a network of various Omnicom and non-Omnicom agencies around the world, including TBWA, OMD, Interbrand, Emanate and Hakuhodo.

In Interbrand's Best Global Brand report, out this week, Nissan's ranking rose from 73 in 2012 to 65.