SEOUL—Ketchum has launched in Korea through a merger with Omnicom sibling InComm Brodeur.

The deal sees the Korean firm rebrand as Ketchum, following the retirement of its veteran chairman Young Sohn earlier this year.

Since Sohn's retirement, InComm Brodeur is led by a leadership team that includes SVP Sally Cho and VP Jeff Joo, each of whom will now report to Ketchum international CEO Jon Higgins.

"Over the years, we have constantly strived to advance as a distinguished communication company and to help our clients achieve the business results they seek," said Sohn. "It is with my full support that Ketchum steps into the business to help the agency grow as part of a global network and achieve its highest potential."  

After launching in 1993, InComm sold a majority interest to Omnicom firm Brodeur in 2001. In 2011, Brodeur management bought back a majority stake in the agency's US presence from the holding group.

Launching in Korea is the latest step in Ketchum's Asian expansion, which has lagged many of its rival networks. The firm bought Indian affiliate Sampark in 2010, following that up by acquiring a majority interest in its Greater China operation in 2011.