NMCB-24 is one of twenty-three Seabee battalions, eight full-time and fifteen part-time. These twenty-three Naval Mobile Construction Battalions (NMCB) combine with three Naval Construction Force Support Units (NCFSU), two full-time and six part-time operational Naval Constructions Regiments (NCR), two full-time Naval Construction Brigades (NCB), and several other support and training units, to form the Naval Construction Force (NCF).
As a commissioned unit, NMCB-24 is full staffed with support personnel as well as construction ratings and would mobilize as a unit. It's mission, described in OPNAVINST 5450.46 (series):
To provide responsive engineer construction capability to Navy, Marine Corps, and other forces in military operations; to construction and maintain base facilities; to repair battle damage facilities; and to conduct defensive operations as required by the deployment situation.