I want some data and sources of data on outcome of using
christian-faith based-principles in employee assistance and workplace
counseling

Don't do it.  You can face accustaions of discrimination.

Quite, how would you handle a Sufi ?

Or an Antheist.

You can use Christian principles without proselytizing.

Can you please tell a situvation where you need to use.

We can definatly use Biblical principles at our workplaces, depends on how it is
conveyed accross.

Personally I go for Ethics

- they are more readily identifiable

Also more readily accepted by people who consider 'Christianity' a
rather strange sect.

Personally I reckon a well placed ounce of lead sorts out most religions.

I prefer Ethics with attitude.