From Texas. A sterotypical Texan/Cowboy accent, middle range voice. 
He's one of the smartest in the group, loves barbecues, guns, and higher education.

[Engineer does not speak directly in the comics given, though if you are casted, you will be voicing the Mecha Engineer in "Shadow Boxers". If all goes according to plan and the first 2 comics are successful, then more comics will be addressed and Engie will have more lines... hopefully.]

(If you're able to do so, two or three takes of the same line in different styles/tones/moods would be very helpful!)