No, efficient, for any race, is a very rare buff and it's supposed to be a bug (or so they say). The rare part is for sure though. I had saurian boffs and looked at saurian boff in the ah as well. And other races too. Didn't find a single efficient boff.
The only guarenteed 'Efficiency" Bridge Officer is the Borg Bridge officer, if you bought your game from Amazon.
To be perfectly honest, as others have said in other threads, it doesn't seem to have much or any effect at all. Many players suspect it is a broken, non-functioning trait. So you aren't really missing much.
Its not broken, you just need points in efficiency skills in order to see the actual difference (at least I never noticed the difference until I had some points in the efficiency skills).
Whenever I switch her in, My efficient saurian science BO adds a few points of energy to some of my power levels in a zone. Would post screen shots if I could figure out how to keep my UI on said screen shots. Its not particularly amazing, but the energy gain is there.
Also, last time I checked they weren't all that rare, people generally tend to look in all the wrong places for them...