as on every other record I have he is known as Gun maker, Gun stocker or Carpenter (carpenter because he makes the wooden part of the gun)
Mary Ann Matilda’s baptism he is an “Edge Tool Maker”
So perhaps he is just able to turn his hand at making things, depending on what work is available.
(Not that that is any help, sorry).
If Matilda Frances is also dead by the time of that baptism, then it doesn’t matter that Thomas is not recorded as deceased, because she isn’t either.