[5] He has also reached out to the people of Pakistan to highlight Bangladesh's spirit of war of liberation, its achievements as an independent country and its commitment to peace and development.

[6][7] While in Lisbon, Tarik Ahsan was making sustained efforts for enhancing Bangladesh-Portugal relations at government as well as people's level.

During this period, he had the distinction of being the 100th signatory on behalf of Bangladesh to the Founding Treaty of International Renewable Energy Agency.

Since late October 2014, Ahsan has been serving as Bangladesh's High Commissioner/Ambassador sequentially to Sri Lanka, Pakistan and Portugal.

After completion of his assignment as Ambassador of Bangladesh to Portugal, he was briefly appointed as one of the Secretaries at the Ministry of Foreign Affairs from 1 to 4 June 2023.