I don't think the Fellowship qualifies as "working for STF". These people are being paid/supported for the work they do in their own projects. They're not being paid to work on/work for STF to help them steer/analyze/control the other projects that are being funded.

EDIT: OPs comment can be understood in multiple ways: Should STF hire Developers to work on their own projects, or should they hire Developers to understand/guide/manage the funded projects in a better way.