Do we contact SkillSignal to add new projects or can we add new projects manually on our end?

Answer:

• This depends on your support tier. If you have the highest level of support with SkillSignal you can reach out to your success manager to facilitate this new project setup. 
• You can also manually add new project sites on your end via the Projects/Sites module on the Web Dashboard.

To set up a project, you can visit this helpful article for your reference:
How to Setup a New Project