Brigitte Posch has joined the emerging markets team at Ambac, having left Moody's Investors Service, after eight years at the agency. Posch assumes her new position as first vice president on Oct. 10. Posch had worked in Moody's Latin American business, particularly in the burgeoning local markets of Mexico and Brazil. She will have a similar focus at Ambac, reporting to Managing Director Diana Adams.

Masumi Goldman has joined Bear Stearns as a managing director covering CMBS research replacing Peter Rubenstein. Goldman reports to head of quantitative research, Senior Managing Director Dale Westhoff. She was hired after six years at Morgan Stanley, which included five years in research and one year in structuring. "Bear Stearns has a long-standing reputation for strong securitized products research," Goldman said in a company release. "I am excited to join the team, and I am looking forward to contributing to the franchise."

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