Chee Ooi joined SSgA as a senior portfolio manager in the firms global active equity group, said spokeswoman Marie McGehee.
Mr. Ooi replaces Taras Ivanenko, who was one of several global quantitative team members at SSgA who left in December to join Lazard Asset Management.
Mr. Ooi was a director and senior quantitative analyst in Citi Investment Researchs quantitative research group. Citi spokesman Duncan Smith couldnt immediately be reached for information about Mr. Oois replacement.