More generally, since Christianity at least is at heart an evangelical "share the Good News to all" religion, that a believer feels obligated to do exactly that has never been a problem for me, nor do I take offense to it.
The American workplace, like the rest of U.S. society, is becoming more religiously diverse and that is raising concerns about employer accommodations for believers — and increasing the odds for uncomfortable moments around the water cooler.
Yet one potential flashpoint among workers does not involve new immigrant faiths but rather two indigenous communities: white evangelicals and unaffiliated Americans who constitute one of the fastest-growing segments of the population.