A Den Chief is a Scout in a troop, a Venturer or a Sea Scout assisting a Cub Scout den. Now that Cub Scout packs can have dens of girls, there is an opportunity to lead them in Cub Scouting and help them cross over into Scouts BSA troops.
Pack Adult Leaders can request the assistance of one or more Den Chiefs from Scoutmasters, Crew Advisors or Ship Skippers, but your troop can also contact local packs with girls to see if they want any Den Chief help from your Scouts willing to serve. Many will be excited to take you up on the offer to have young women serve as role models to these female Cub Scouts.
As with historic relationships between packs and troops, troops will want to have some profile with Cub Scouts and their packs and Webelos Scout dens: help at a Pinewood Derby, tell the story of Scouts BSA at a Pack activity, conduct joint outdoor activities or service projects, so that the Cub Scouts will want to do what Scouts in your troop do, and parents will want to see their Cub Scouts grow up to be Eagle Scouts.
See this Den Chief Training page and training facilitator’s guide for more.