Help with the 5 tech Definition

Looking for wisdom from Magnus or other Gurus of the X and O with regard to the 5 tech position.  According to Matt Godin's brother (great get for the board) he was apparently told that he is being recruited as a 5 tech DT/DE.   It is my understanding that the 5 tech lines up on the outside shoulder of the OT, which to me says Defensive End.  I know in a three man front the 5 tech could be termed a DT/DE, but as we will be running a 4 man front (or 5-2 as Mattison has said)  how can the 5 tech be called a DT?