Y'know, I can't really see myself wanting to be employed pedaling bibles door-to-door. But I can see myself being employed on a fishing boat owned by an evangelical Christian. Seas get rough, I'll be praying my way while he prays his.  Don't see how it would hurt--don't think my prayers would cancel out that Christian skipper's if we're praying for the same thing.  Besides, that's what Qur'an says:

"Lakum diinukum wa liyyaa Diin--unto you your way, and to me my way."

Addendum: just don't try to throw stumbling blocks in front of me.  Jesus (alayhis-Salaam) wouldn't like it.