Who is in charge?

The default answer to this question asks you to trot out the 'leader'.

We don't have 'leaders' in church.

A leader in modern terms would be the Greek archon: a ruler, boss or governor. One in command. We don't have this in the church. The closest thing might be overseer (elder) or the modern invention 'pastor'. 'Minister' is the best general term, and I think 'Senior Minister' is OK: senior servant, like your Butler at home.

The Senior Minister is the one who coordinates the service of the other ministers (both paid and volunteer).

In our church we have Organizers (who help the Coordinator), Convenors of home study and prayer groups, Ministry Assistants and Helpers (who attend to practical aspects of service).

But, I'm still groping for the word that is short snappy and to the point.

Moderator, as in some denominations; I think is a better term than president or chairman, so it might be useful.

For the local church, the general term I like, if 'minister' is inappropriate, ambiguous or confusing is Steward. A steward is used in secular connections, but ours is different. Instead of a youth group volunteer 'leader', who I would call a 'ministry assistant', but that is too clumsy for easy conversation, there would be stewards. 'Counselors' might also work, based on the term in summer camps; although this might be confused with therapeutic counselors. Organizers might also do the job.

But not 'Leader'. Ever!