、。
You're doing good work, kid.
Literal
You, good work [object-を] doing-[confirming-な].
ええ is the Kansai-dialect form of いい ('good'). 君 is a familiar second-person address. ~な at the end is an emphatic/confirming sentence-final particle with a masculine flavor. してる is the contracted progressive ている. The whole sentence reads with a slightly rough, Kansai-flavored, complimentary tone.