Final answer:
The current leader of the Scientology group is David Miscavige and his duties involve overseeing the operations of the Church of Scientology and its affiliated organizations.
Step-by-step explanation:
The current leader of the Scientology group is David Miscavige. As the leader of the group, his duties involve overseeing the operations of the Church of Scientology and its affiliated organizations. Some of his specific responsibilities include managing the church's finances, promoting its teachings, and making high-level strategic decisions.