1. When Advertising your Project listing begin with one of the following “Primary Category Classifications” because it will affect the visibility and SEO of the Job Opening. Below is the Primary listing List:
2. Agriculture,
3. Forestry
4. Fishing,
5. Construction
6. Manufacturing
7. Mining
8. Real Estate
9. Transportation
10. Public Utilities
11. After having selected a Primary category of the Job Opening you can then add another category which is a sub-category. You should be able to add more than one, 
12. Finally, there is a section on this form labeled Tags & Keywords. You can further fine tune the name of the Project or even add a project ID.

The reason for this suggestion is to allow a better search and find feature for SEO and for the user experience.