Well he was Konoha Police, and he knew some advanced Uchiha Katon techniques. I'd say he had an IQ of about 160 or so. He didn't have a Sharingan (well not awakened

) But his Kunai and Shuriken skills were off the charts ! (Itachi inherited this from him, and so did Sasuke with his ingenious puppet shurikens). Overall I'd say he was a bit better than the average Jounin.
This is all opinionated however, please don't Kamui me into Nothingness .__.