At least one assistant Cubmaster should be able to replace the Cubmaster's position in case of an emergency. The assistant Cubmaster is recommended by the Cubmaster, approved by the pack committee and chartered organization, and registered as an adult leader of the BSA.

The Assistant Cubmaster's main responsibilities are to:

• Help the Cubmaster as needed. Be ready to fill in for the Cubmaster, if necessary.

• Complete Cubmaster Fast Start Training and position-specific Basic Leader Training.

• Attend monthly roundtables.

• Participate in pack meetings to assist Cubmaster.

• Supervise den chiefs and verify that they are properly trained for the rank they are assisting.

• Conduct the monthly Den planning portion of the Committee meeting for all den leaders, assistant den leaders, and den chiefs. Plan and coordinate promotion of regular den meetings and pack meeting participation.

• Work with neighborhood troops that supply den chiefs. Work with District Executive if necessary. 

• Identify area BSA troops into which Webelos Scouts may graduate.

• Help inform pack leaders of training opportunities and arrange for them to attend training sessions.

• Work with the pack committee to develop and promote an ongoing plan for recruiting new boys.

• Help with pack activities, such as dinners, derbies, bike safety workshops, service projects, etc.

• Work with the pack committee on outings to see that the pack and dens qualify for the National Summertime Pack Award.

• Participate in the annual pack program planning conference and pack leaders' meetings.

• Promote the religious emblems program.