Practitioners will need to be well versed in mindfulness practices. THey will need to demonstrate that they have practiced mindfulness in their own lives and articulate how and when they would use it in their own lives. 

Good training resources for this include Thich Naht Hanh's you tube videos about "Opening the Heart" in which he explains the different stages of mindfulness.

I will need to develop/source exercises that teach the different stages of mindfulness.

This will involve the practitioners in keeping a reflective journal in which they report on their experiences of practicing exercises that teach the different stages of mindfulness.

I can also adapt material form Jon Kabat-Zinn's Full Catastrophe Living and his MBSR programme.