White & Case on Thursday shook up its executive committee as a New York intellectual property partner stepped down to be replaced by the head of the firm’s London office. The firm said Dimitrios Drivas would step down “to devote himself full time to serving clients and further developing” the firm’s IP practice, which he heads globally. Drivas will be replaced by Oliver Brettle, the managing partner in London.

White & Case Chairman Hugh Verrier said in a statement he was “grateful” for Drivas’ contributions to the firm’s management. The firm is “fortunate to have him return his full attention to the service of his clients and practice,” Verrier said. Drivas was preparing a witness for trial and was unavailable for comment.