Goldman Sachs Group said yesterday the chairman of its European investment banking business, Claudio Costamagna, will leave at the end of March.

Mr. Costamagna, 49, is the sixth high-level departure from Goldman Sachs in the past year and at least the third under the age of 50. Goldman regularly eases out well-paid senior executives in an attempt to create incentives for even younger bankers to build bonus-enriched career paths. The traditional partnership route to long-term success at the firm was largely eliminated when Goldman went public in 1999.

Peter Weinberg, 48, who was chief executive of Goldman Sachs International, left in the summer and last month said he will join the high-profile startup boutique of Joseph Perella. Mario Draghi a vice president, left last month to become governor of the Bank of Italy; and Vice Chairman Robert Kaplan, 48, said last month that he is retiring. Simon Robertson, the former president of Goldman’s European business, left in August to start his own boutique.

Meanwhile, Citigroup hired two investment bankers in Brazil from Goldman Sachs,the country’s top deal adviser for the past two years. Matheus Villares and Cristiano Camargo have joined Citigroup,a Miami-based spokeswoman for the bank said on the condition she not be named. Citigroup has hired five bankers from Goldman in Brazil in three weeks. Citigroup’s mergers and acquisitions group in Brazil is led by Ricardo Lacerda, 37, who previously ran Goldman’s business.

The expansion has enabled Citigroup to snare business from Goldman. Goldman last month was forced to share the job advising Electricite de France SA on the sale of Brazilian assets after three of its bankers, Fabio Bicudo, Joao Schmidt, and Flavio Aidar, joined Citigroup.