In regard to the job description and the ministry, it will vary according to the needs of the community. If a community has a large number of youth, then that may be a major area of ministry for the pastoral assistant. The pastoral assistant should not, however, be only a Youth Director. To isolate them is dangerous. Families do not even eat meals together anymore.
Kids go one way and adults another.
We need Youth Programs but we also need our youth to become involved in, not separated from, the life of the Church. There is a need in the Church that this role can fulfill. There is much work for many hands in the vineyard of Christ.