In recent years NTU has carried out assignments in a total of 148 countries worldwide.
Europe: Albania, Andorra, Austria, Belarus, Belgium, Bosnia & Herzegovina, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lichtenstein, Lithuania, Luxemburg, Macedonia, Malta, Moldova, Montenegro, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Ukraine and the United Kingdom
America: Argentina, Belize, Bolivia, Brazil, Chile, Colombia, Costa Rica, Dominican Republic, Ecuador, Guyana, Haiti, Paraguay, Peru, Suriname, Trinidad and Tobago and Uruguay
Africa: Algeria, Angola, Benin, Botswana, Burkina Faso, Burundi, Cameroon, Cape Verde, Central African Republic, Chad, Comoros, Côte d'Ivoire, Djibouti, DR Congo, Egypt, Eritrea, Ethiopia, Gabon, Gambia, Ghana, Guinea, Guinea-Bissau, Kenya, Lesotho, Liberia, Libya, Madagascar, Malawi, Mali, Mauritania, Mauritius, Morocco, Mozambique, Namibia, Niger, Nigeria, Republic of Congo, Rwanda, Sao Tome & Principe, Senegal, Seychelles, Sierra Leone, South Africa, South Sudan, Sudan, Swaziland, Tanzania, Togo, Tunisia, Uganda, Zambia and Zimbabwe
Asia: Afghanistan, Armenia, Azerbaijan, Bangladesh, Bhutan, China, Georgia, India, Indonesia, Iraq, Israel, Jordan, Kazakhstan, Kyrgyzstan, Lao People's Democratic Republic, Lebanon, Maldives, Nepal, Pakistan, Palestinian Authority, Russia, Singapore, Sri Lanka, Syria, Tajikistan, Thailand, Turkey, Turkmenistan, United Arab Emirates and Uzbekistan
Oceania: Fiji, Kiribati, Papua New Guinea, Samoa, Timor-Leste, Tonga, Tuvalu, Vanuatu and Wallis & Futuna.