What was St Simon the Zealot's job?

Answer 1

There is no mention of Simon the Zealot in The Bible, though there are a few Simons mentioned

Another answer:Simon "called the Zealot" (or Zelotes - KJV) is mentioned twice in the New Testament, in Luke 6:15 and Acts 1:13. Both instances are rosters of Jesus' apostles.

The purpose of specifically referring to him as the Zealot was probably no more than to distinguish him from Simon Peter. No mention is made of what his "job" was.

Answer 2

First we need to establish exactly who Simon the Zealot was. John Shelby Spong (Jesus for the NonReligious) points out that Mark's Gospel did not actually call Simon "the Zealot" - it called him "the Cananaean", although only some English translations follow this wording. The English Standard Version, English Revised Version, International Standard Version, American Standard Version, Douay-Rheims Bible, Darby Bible Translation and Weymouth New Testament say "the Cananaean"; the King James Version, American King James Version, Webster's Bible Translation and Young's Literal Translation call Simon "the Canaanite"; while the New International Version, New Living Translation, New American Standard Bible, God's Word Translation, Bible in Basic English and the World English Bible call Simon "the Zealot". What is the explanation?

Spong says that Mark's description of Simon could have had any one of at least three meanings: he was from the village of Cana, where John 2 says a wedding took place; He was a Canaanite; or (from qan'ana) he was a former Zealot.

The first two options are considered unlikely, so from what little we know, Simon may have been a member of the Zealot sect, although this tells us nothing of what job he did.

Copying from Mark, Matthew seems to have retained "Cananaean", but Luke's Gospel accepted the third meaning, thus replacing "Cananaean" by "Zealot".