Yusof is the incumbent 2nd Minister of Foreign Affairs of Brunei and ASEAN's special envoy to Myanmar.

[2] Erywan was appointed deputy minister of foreign affairs in the 2015 cabinet reshuffle on 22 October, and subsequently appointed deputy chairman of the Brunei Strategy Council in November 2015 and of the Brunei Economic Development Board in 2016.

In April 2021, Dato Erywan was instrumental in helping to draft the Five Point Consensus (5PC) and was subsequently adopted by the ASEAN Leaders' Meeting in Jakarta, Indonesia.

[3][4] Following another cabinet reshuffle on 7 June 2022, Erywan retained his position as minister of foreign affairs II.

[5] On 14 October 2023, Yusof abruptly cancelled a planned visit to Myanmar after no consensus among ASEAN Foreign Ministers on the proposed list of opposition stakeholders that Dato Erywan can meet, like former Vice President Henry Van Thio, in contravention of the five-point consensus agreed to by parties.