[@Lord Wraith]Right off hand. Vulcans or Humans. :D

Bajorans, Romulans, Cardassians, Elaysians, Betazoids, Bolians and Trills have all canonically held positions in the science/engineering career field. 

But I'd think any race inside the Federation would fit the bill. 

(Whew, that took me a bit to find out)