One of the trickier parts of building a scouting ministry is matching the right people with the right jobs. Lots of people in the congregation will say they don't know anything about camping, or they aren't ready to commit a lot of time to volunteer with scouts. You have to find something they are interested in.
One position I am carving out is that of "Service Project Coordinator". This is not an official position in the BSA or GSUSA, but would probably fall under that generic role of "Committee Member"
This would be an ideal role for someone from the church who can help advise and suggest service projects for the Pack or Troop to participate in. Odds are, you have some people in the church that are highly involved in ministries that give back to the community, such as a Food Pantry, or Clothing Closet. These kind of people would be ideal for coming up with great ideas for service opportunities for your scouts.
For Older Boy Scouts and Girl Scouts, they may be able to help with Eagle or Gold Projects as well. Not so much handling the paperwork/documentation, but being a resource for the older scouts to explore ideas on how to help their community via a service project.