In 2010, Mohib became the chairman of the Buthidaung Maungdaw Regional Development Association (BMRDA). In 2012, he began to write posts for RohingyaBlogger.com about the atrocities committed against the Rohingya, and the need for justice. In November 2014, he met with
US President Barack Obama when he visited Myanmar, and expressed concern about the country's treatment of ethnic minorities. Ullah described working toward three objectives: "justice; peace and unity; and returning home". To document these crimes, ARSPH volunteers walked door-to-door in the camp to find out who had family members who had been killed and who had suffered or witnessed other outcries such as torture, rape, and the burning of homes and villages. ARSPH advocated for the safe and voluntary repatriation of the Rohingya to their homeland in Rakhine State. It was organizing discussions on the issue of repatriation within the camp at the time of Ullah's death. Ullah had also reached out to the
National Unity Government (Myanmar's government in opposition) and groups opposed to the junta in Myanmar to discuss the repatriation of the Rohingya.
International forums In March 2019, Ullah travelled to
Geneva with another Rohingya leader, Hamida Khatun of the women's organization Shanti Mohila, to address the UN Human Rights Council. There, he addressed the diplomatic missions of states from around the world, saying, "Imagine you have no identity, no ethnicity, no country." Nobody wants you. How would you feel? This is how we feel today as Rohingyas." After his death, the High Commissioner for Human Rights reflected on his 2019 speech, saying, "His words were very powerful and highlighted the terrible situation of the Rohingya, and today, four years later, they reverberate as a reminder that the Rohingya are still waiting for justice and still waiting to return home." In July 2019, Ullah travelled to
Washington DC, where he was one of a group of refugee victims of religious persecution to meet with US President Donald Trump. At the meeting, he asked President Trump "what the plan is" to help the Rohingya return to Myanmar. President Trump did not answer the question and did not seem to know where Bangladesh is. The meeting received wide coverage in the international media. On 25 August 2019, Ullah organized a ceremony at the refugee camp to commemorate two years since the start of the 2017 eviction operations at the camp – a day that many refugees refer to as "Genocide Day". The ceremony was attended by some 200,000 refugees. == Death and legacy ==