Shariar was the director general of the American wing at the Ministry of Foreign Affairs.[6]
In 2022, Netra News reported that Shahriar, Deputy Chief of Mission at Bangladesh's Washington embassy, was a key figure behind official letters defending the Awami League government's stance on enforced disappearances, the Digital Security Act, and the Bhasan Char relocation.[7] Her communications, often directed at major US media outlets and human rights organizations, formed part of the Bangladeshi government's broader lobbying campaign branded as “political propaganda” under US law.[7] She was the acting chief of the mission after Ambassador Mohammad Imran was transferred out.[8] She moderated a seminar on the death anniversary of Bangabandhu Sheikh Mujibur Rahman hosted by the Bangladesh Embassy to the United States.[9]
In November 2024, Shahriar was appointed High Commissioner of Bangladesh to Singapore.[10] She has been serving as the director general of the Myanmar wing at the Ministry of Foreign Affairs.[2] She went on an official trip to Kunming, China, accompanying Khalilur Rahman, High Representative to the Chief Adviser, Muhammad Yunus in Bangladesh's interim government, from 28 February to 2 March 2025.[11]