The custodian will also provide depositary, clearing and foreign exchange solutions for Pacific Asset Management's UCITS funds.
Citi has recently gained a number of licenses from Chinese financial regulators that have enabled it to do business for foreign investors in the country.
Todd Johnson has previously worked as head of international prime brokerage at Deutsche Bank, and head of European prime brokerage at Citi.
Rapidly-growing fund administrator selects Citi to provide custody services to its asset management clients.
The consolidation of the US assets, representing $39 billion, with Citi as its single provider successfully went live in December last year.
The mandate expands the strategic relationship between Citi and Aegon Asset Management, which owns Kames Capital.
Cindy Chen will oversee the post-trade business development team, as well as the blockchain project HKEX is working on with Digital Asset.
Citi has added three key executives to its global securities services and issuer services (SS&I) operations team.
Citi already offers direct custody and clearing services in Denmark, Finland and Sweden, with expansion taking its European sub-custody network to 37 markets.