TechGuard Security is a woman-owned, full-service security services company. It offers armed and unarmed security, patrolling, executive protection and investigative services. TechGuard Security serves residential communities, government agencies and commercial facilities in Missouri and Maryland. It also offers background, domestic, criminal and professional undercover investigation, as well as video and surveillance monitoring and information gathering services. TechGuard Security also assists clients in the areas of vulnerability assessment, penetration tests, intrusion detection systems and information technology audits. It is a distributor of PoliWall, which is a bridging security appliance designed to block unwanted Internet traffic from selected countries. TechGuard Security maintains a location in Chesterfield, Mo.