Our Company

Tier 1 Security Group was founded to provide a higher standard of security services built on military leadership, operational discipline, and mission-focused execution. We understand that security is not simply presence — it is preparation, professionalism, and performance under pressure.

We support clients with armed and unarmed security services, executive protection, site security, and operational staffing support for complex and high-risk environments. Our approach emphasizes risk mitigation, clear communication, and strict adherence to client requirements and compliance standards.

Commitment to Clients

Whether supporting a federal agency, prime contractor, or corporate entity, Tier 1 Security Group is committed to delivering reliable security solutions tailored to mission requirements. We approach every engagement with professionalism, discretion, and a focus on measurable performance outcomes.

Leadership

Tier 1 Security Group is led by David Greene, a U.S. military veteran with 10 years of service, including combat deployments and experience in high-threat operational environments.

Following his military service, Mr. Greene worked in private security operations in high-risk regions, including protective assignments supporting senior Department of Defense leadership, including the Secretary of Defense. His background includes service in specialized units with advanced training in weapons systems, protective operations, tactical mobility, defensive driving, and mission planning.

This leadership experience forms the foundation of Tier 1 Security Group’s operational philosophy: disciplined execution, professional conduct, and unwavering accountability.

Standards & Professionalism

Tier 1 Security Group operates with a clear emphasis on:

• Professional appearance and conduct

• Structured training and qualification standards

• Strong supervision and reporting protocols

• Compliance with federal and contractual requirements

• Clear communication with clients and partners

We understand the importance of maintaining operational readiness, adhering to scope of work requirements, and representing our clients with integrity.