The CIMA Employer of the Year award had been previously won by firms like Barclays and Morgan Stanley.
"Amba Sri Lanka™s entry into the title fight is supported by its identity of a world-class investment research support services provider offering high quality services, employing the finest personnel and providing its employees with intensive, highly-acclaimed training," the company said in a statement.
"It also marks the first time a company with operations based in Sri Lanka is among the short-listed candidates vying for this title.
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Amba Sri Lanka currently has the highest concentration of CIMA-qualified staff engaged in equity, fixed income, credit, and quantitative research.
Amba Research employs over 550 people.
Its employees are mostly based in four delivery centres spanning Latin America, Southeast Asia and South Asia.
The nomination recognises the inspirational work of the people, teams and management who make Amba Research the leading provider of inv