I am making this under question category because I cannot think right now due to finals. It is also under "reflection" category as it may pertain to the kind of attitude a Christian should have in any work place.
I use "duty" instead of "job" because there is a distinction. Church can hire non-christians to do certain job: cleaning, staffing, etc. However, the term duty I refer to the kind of job one does to serve God intentionally. Thus, a duty is a job performed by only Christians: pastor, church leaders, Bible study teacher, preacher, etc.
There may be further distinction between a "duty" and a "job", or between a pastor and an employee in company XYZ:
That is, a pastor can never say (in any condition), I'm here because I was asked/hired/invited, with the implication that he wouldn't be here otherwise. As if he's saying, I am not really serving God, I only answer to those committee members who hire me, if they are not serious about it, I shouldn't take it seriously either, God is not in the picture. This is basically blasphemy.
However, a regular employee from company XYZ could use this line of reasoning. He breaks no human law. Even if he's a Christian.
This is because the former deals with only the law of God; while the latter does not necessarily do so directly. Therefore, that line of reasoning is applicable only under human law.
So the question would be, would a job of any kind, still be under God's law of servitude to God, such that such line of reasoning (in bold text above), would never never be applicable anywhere.
My inclination is that such reasoning is never applicable anywhere in any situation. However, there may be degrees of applicability of such reasoning in secular/pagan work place.
God does not beg us to do a job. However, a person can do so. If that is so, is it still a job? Who's the boss and who submit to whom? Is it misleading to have invitation/plea disguised as a job? Nevertheless, A Christian employee does not see things the same as a non-Christian one.