1. Hospitality and tourism: Qatar is home to a large number of upscale hotels and resorts, and the expatriate population has a significant presence in the hospitality and tourism industry, where they provide a great deal of services and support in the hospitality, tourism and related services sector.
2. Construction and engineering industry: Qatar is in a phase of rapid development and requires a large number of construction and engineering services. The expatriate population has a wealth of experience and skills in the construction and engineering industry and they provide Qatar with high-quality construction and engineering services.
3. Healthcare: Qatar's healthcare sector is also very well developed, and expatriate doctors and nurses play a very important role in the healthcare sector, providing high quality healthcare services to both the local population and the expatriate population.
4. Retail and Wholesale: The expatriate population plays an important role in Qatar's retail and wholesale sector, working in a variety of stores and supermarkets, providing goods and services and supporting Qatar's business development.