Securitas Security Services USA, located in Billings, Mont., is one of more than 600 regional offices, owned and operated by Securitas Security Services USA, which maintains headquarters in East Boston, Mass. Securitas is among the largest security companies in the United States. It provides security solutions comprising guarding services, alarm systems, cash handling services, patrols and inspections, access control, reception and badging services, security console operators, alarm response and specialized client requested services. Securitas Security Services USA is a subsidiary of the Securitas Group, a global security conglomerate with operations in more than 20 countries throughout the world.