Is it permissible to work for US-based international organizations in Islamic countries to develop communities?

Asalum u Alikum Waramtullah, That was very nice from hear you, I am pleased to receive the reply from you. My question was comprised form two section. 1. Working in humanitarian agencies like WFP, UNHCR, WHO in aim of working just in favor of the community in terms of dispatching the food commodity to the poor people or heading the vaccination program to the people or settling the refugees in the camp. Well the fund is always from the unbeliever’s countries like US, EUROPE. 2. The second part was about those international organizations working in Islamic countries in aim of to serve the humanitarian work or develop the communities to provide them the facilities or education programs. The international organizations are mainly from USA or from European countries. The Jobs found in above two different organizations or agencies can be the project managers or Administrations duties. These ALL UN agencies and international organizations are working in close coordination with government to stable the governance. So Am I allowed in working in US based international organization, working in the community’s development? The Job would be the making the projects for the communities favor in close coordination with the government and running the database. I hope Inshallah, I will receive the answer from you. Wasalam