Let me ask you some questions.
Is one sin any worse than another and if you claim it is, please give me your Scriptural reference?
Can an adulterer be a conservative?
Can a tax cheat be a conservative?
Can a hater be a conservative?
Can a sinner be a Christian and is a Christian also a sinner? (this one's too easy)
Is it yours or anyone else's place to rate sin?
Does employing any sinner indicate that the sin is condoned?
These are just a few things to consider. Any sinner who saturated his/her workplace or position with sinful acts should be removed. Likewise, if his/her sin is in check and does not affect the job, why should he/she not be employed?
Furthermore........if we are now to eliminate people from jobs because of sin, what are we to do? No one will be working.
If a homosexual man was appointed as the boys' swim coach, I might take issue. However, I might also have a similar issue if a philanderer was the girls' swim coach. I have no issue if either one wants to cook steaks at the local restaurant.