Syria’s state-run news agency SANA said in a statement on Wednesday that Soussan was officially sworn in before Assad during a ceremony attended by Saudi Foreign Minister Faisal Mekdad.
Sousan will be the first Syrian ambassador to be dispatched to Saudi Arabia since 2012, thus completing the steps to restore diplomatic relations between the two countries.
During Wednesday’s ceremony, Maher Baddour also took the legal oath as Syria’s Ambassador to the People’s Democratic Republic of Algeria.
Later, President Assad received the two ambassadors and wished them success in their missions.
Saudi Arabia closed its embassy in Damascus and withdrew all diplomats in March 2012. Back in May, the two countries agreed to resume diplomatic relations and re-open embassies.
In the same month, the Arab League, a 22-member intergovernmental organization of Arab states, agreed to welcome Syria back into the fold with immediate effect after more than a decade.
Syria was one of the six founding members of the Arab League in 1945. The Arab League suspended Syria’s membership in November 2011, citing an alleged crackdown by Damascus on opposition protests.