Saichin was previously head of emerging markets and a high yield fixed income portfolio manager at Pioneer Investments, and has spent 13 years as an emerging markets portfolio manager.
It was announced earlier that Yerlan Syzdykov is to replace Saichin at Pioneer.
His appointment comes as the firm looks to take advantage of the increasing opportunities in the EMD space.
It follows the recent development of an infrastructure debt and infrastructure equities business, and the addition of a range of regional Asian bonds.
Andreas Uterman, co-head and global chief investment officer at AllianzGI, said: “With the secular rebalancing of global growth from OECD markets towards emerging economies, emerging market debt is becoming an increasingly significant and attractive asset class for long term investors. The superior growth rates will be sustained through higher rates of investment, much of which will be debt-funded.”