I just did a 10 page paper on the subject! It is a really broad job, not easily distilled. Try doing a lit search.
Here are a few of things I found for a staff development clinical nurse educator (not the ones teaching student nurses) of a health care facility:
-responsible for researching and dealing with sentinel events, designing courses to correct and prevent them.
-provide general competency courses, as well as ones specialized for specific areas
-provide for counseling and debriefing sessions
-provide courses needed to meet JCAHO requirements
-do research in house (mining charts for data) to see that patient health needs are met, as well as staff needs
-orient new staff at appropriate levels, from new grads, to nurses in new areas, to specialists coming into their own area but new to facility
-teach staff how to be good mentors and preceptors
-bring in evidence based studies to update policy and procedures in house to maintain state of the art care
-review and revise policy and procedures in general
-recruit staff (nurse, doctor, other specialists) to give courses
-know how, and apply for, continuing ed credits for courses given
-bring in courses for National Certifications, help staff attend out of house certification courses
-monitor and reimburse for tuition costs incurred by staff furthering their educations
-provide cost analysis studies on the benefits of anything done, justify budgetary needs
-prepare and present departmental budget to hospital/facility
Hope that helps, I know your request was posted in June.
I see you are in Lebanon, will pray for your safety.