[1] After joining the Foreign Service in 1996, Chung's first overseas post was as a consular officer at the United States Consulate General Guangzhou, China.

At the United States Embassy Tokyo, Japan, she worked as the bilateral trade officer for the civil aviation and automobile sectors.

At the Embassy Hanoi, Vietnam, she acted as an Assistant Public Affairs Officer,[9] and later as a coordinator for the Asia-Pacific Economic Cooperation (APEC).

[8] During her tenure as Deputy Political Counselor at the Embassy Bogota, Colombia, she managed the U.S. government's largest extradition program, as well as the United States representative to the Group of 24 (G-24).

[13] US Ambassador Julie Chung has been accused by Sri Lankan parliamentarian, former minister Mr. Wimal Weerawansa of being involved in a conspiracy to overthrow former President Gotabaya Rajapaksa and his government.

Ali Sabry, urging decisive measures to be taken against the US Ambassador Julie Chung to Sri Lanka due to violations of diplomatic protocols.

The Committee's Chairman, Retired Rear Admiral Sarath Weerasekera, expressed concern in a letter to the State Defense Minister, questioning the legitimacy of statements about peaceful protests.

Citing the Vienna Treaty, he emphasized that ambassadors should not interfere in another country's internal affairs, urging Chung to refrain from such statements in the future.