The 149th Security Forces Squadron (SFS) is a United States Air Force unit under the Air Combat Command. It falls within the 176th Wing at Joint Base Andrews, Maryland. The primary mission of the 149th SFS is to provide air base defense and law enforcement functions across the installation. This includes counter-terrorism operations, force protection, and emergency response duties. The unit also provides specialized security for designated Air Force personnel, high-ranking government officials, and visiting foreign heads of state. Additionally, they are responsible for maintaining combat readiness through physical training, weapons proficiency, and tactical drills to ensure the safety and security of Joint Base Andrews.