J. Walter Thompson’s (JWT) global business director on its De Beers account, David Lamb, is leaving its London office for New York, Haymarket Publishing Services, Ltd., reports.

Lamb will take on a senior planning role, working closely with Bob Jeffrey, the president of JWT North America.

”I am going to look at the agencies strategic product – account planning and intellectual output,” Lamb told Haymarket.

Lamb joined JWT in 1995 to run its prestigious global De Beers account.

Lamb’s appointment to the De Beers account (since January named the Diamond Trading Company), came two months after JWT landed the task, which consolidated the gem and diamond giant’s global account with the agency.

Carol Potter will replace Lamb as the global business director on the Diamond Trading Company (DTC) account. She has been groomed to replace Lamb since last year. ”I am really looking forward to being responsible for DTC,” Potter told Haymarket. ”It’s an interesting reflection on the new JWT worldwide management. This has been boldly planned.”

Her promotion also means that she will be the first woman to sit on the agency’s worldwide executive group.

JCK