Complex sentence: Don Julián serves as a "three time" "gobernadorcillo" (municipal mayor) of his "pueblo" (town) and later held the position of "oficial de mesa" (government clerk) of the "alcalde mayor" (provincial governor).
Split into simpler sentences: Don Julián serves as a "three time" "gobernadorcillo" (municipal mayor) of his "pueblo" (town). Julián later held the position of "oficial de mesa" (government clerk) of the "alcalde mayor" (provincial governor).