Rate Module - Ability to "Rate" people
Drupal is very capable in this arena.

A few modules that come to mind are:


Voting API
Fivestar
Rate


With more detail I think you would get a better answer, but at a glance I believe you could accomplish this quite easily with readily available modules.

The tricky part I believe will be figuring out how to structure your site.

Will People/Service providers be stored as nodes or user accounts?

Will users need to register to rate? Can anonymous users rate? Both?

Can service providers register their own business/service or will you be adding a pre-selected list?



If you create a custom content type called "Service Provider" for example, you could apply the Rate module to this content type and have something up and running quite quickly.