[2] He briefly served as vice president of the Senate before being reappointed foreign minister in November 2024.

[7] Prior to being named Minister of Posts and Telecommunications,[8] Sokhonn was Vice-President of the Cambodian Mine Action and Victim Assistance Authority,[9] which regulates landmine clearance and assistance to landmine survivors in Cambodia.

[10] During that tenure, he was elected to chair the Anti-Personnel Mine Ban Convention, better known as the Ottawa Treaty, aimed at eliminating landmines around the world, for one year, including presiding over the diplomatic treaty's meeting in Phnom Penh.

[11][12] As President of the conference, he tried to promote adherence to the landmine treaty in South East Asia, succeeding in securing the participation of Myanmar in the meeting[13][14] The Eleventh Meeting of the States Parties to the Anti-Personnel Mine Ban Convention (11MSP) chaired by Sokhonn, was the largest international gathering ever hosted in Cambodia.

[15][16] In November 2021, Hun Sen signaled he may replace Erywan Yusof with Sokhonn, who has criticized the Burmese military regime, when Cambodia chairs ASEAN next year, as ASEAN's special envoy to Myanmar.