Security Guard Company in California

Alterra Private Security provides professional private security guard services throughout California for commercial properties, construction sites, warehouses, residential communities, healthcare facilities, and special events. Our licensed security officers deliver dependable protection through proactive patrols, access control, rapid response, and site-specific security programs. As a trusted security guard company in California, we deliver reliable protection to reduce risks, deter criminal activity, and support safe daily operations.
About Alterra Private Security

Alterra Private Security specializes in providing professional private security guard services at locations across California for commercial properties, residential communities, industrial facilities, construction sites, healthcare organizations, warehouses, and special events. Every property presents different security challenges. We tailor each security program to your site’s operations, risk level, and day-to-day activities.
Our services include on-site security guards, mobile patrol, fire watch, armed security, unarmed security, executive protection, and access control. Every assignment is supported by licensed security professionals, experienced supervision, and responsive customer service to help protect people, property, and assets across California.
Professional Security Services Built on Trust

40 years
of Experience

Private Security Guard Services in California

Effective security starts with trust, consistent communication, and proactive protection. Our licensed security officers are trained not only to deter security threats but also to provide professional customer service, resolve conflicts, and respond to emergencies when needed. This ensures a professional, approachable, and effective presence at every location. By maintaining the highest standards of conduct and accountability, we provide peace of mind to clients while safeguarding their assets, people, and reputation.
Every property has different security requirements. Because of this, we design security programs based on our client’s operations, the site’s risk level, and site conditions. To support the security of our clients’ environments, our security officers perform routine patrols, monitor access points, maintain daily logs, and respond to incidents.
Protect your people, property, and operations with Alterra Private Security. Contact our team today for a customized security solution and trusted security services anywhere across the state.
Why Choose Alterra Private Security Company in California?

At Alterra Private Security, our licensed security officers receive ongoing training in threat assessment, access control, emergency response, conflict resolution, incident reporting, crowd management, & customer service. This comprehensive preparation enables them to respond to the demands of a dynamic security environment while maintaining a professional presence across a variety of properties in California.
Businesses across California rely on us for Fire Watch, Mobile Patrol, Armed Security, and Unarmed Security services tailored to their property’s specific needs. As a leading security guard company in California, we are proud of our highly trained & fully licensed staff who deliver security through proactive monitoring and rapid response.
WHAT SETS US APART?

Our Security Process

We follow a structured approach to developing security programs that align with each client’s operational requirements and risk profile. From the initial consultation to ongoing security management, our goal is to provide dependable protection while maintaining clear communication and professional service.
1. Consultation
Every project begins with a consultation to understand your property, daily operations, security concerns, & protection objectives. Whether you require short-term coverage or a long-term security program, we take the time to understand your specific requirements before recommending a solution.
2. Site Assessment
Our team evaluates your property’s layout, access points, traffic flow, and potential security vulnerabilities. This assessment helps identify areas that require additional protection and allows us to recommend the most effective security strategy for your location.
3. Customized Security Plan
Based on the site assessment, we develop a security plan tailored to your operational needs. The plan outlines guard responsibilities, patrol schedules, access control procedures, reporting requirements, emergency response protocols, and any site-specific instructions needed to maintain a secure environment.
4. Professional Guard Deployment
Once the security plan is approved, our licensed security officers are assigned to your property. Throughout the assignment, our management team provides ongoing supervision, quality assurance, and regular communication to ensure consistent service and continuous support.
How Our Security Guards Protect Your Property

Effective security requires more than simply placing a guard on-site. At Alterra Private Security, every assignment begins with a thorough understanding of your property’s operations, security concerns, & daily activities. Our security officers follow site-specific post orders and established procedures to help maintain a safe, secure, and well-managed environment.
Depending on your facility and operational requirements, our security guards may:
Every assignment is supported by regular supervision, clear communication, and ongoing quality assurance, ensuring our security officers consistently meet your property’s security requirements while maintaining a professional presence.
Why Businesses Hire Professional Security Guard Services

Businesses invest in professional security guard services to reduce security risks, maintain safe environments, & support uninterrupted operations. Visible security officers help deter criminal activity, monitor access points, respond to incidents, and provide reassurance for employees, customers, tenants, and visitors.
Whether protecting a construction site, warehouse, retail center, apartment community, healthcare facility, or commercial property, professional security guards provide a visible security presence while helping property owners manage daily security concerns more effectively.
When Should You Hire Security Guards?

Many businesses wait until a security incident occurs before seeking professional protection. However, proactive security can help reduce risks before they lead to costly disruptions or property damage.
Professional security guard services are commonly recommended when your property experiences:
Our Security Guard Services

We provide customized security guard services in California for commercial, residential, industrial, and public-sector clients. To meet different operational requirements, we offer BSIS-certified armed and unarmed security guards, mobile patrol, fire watch, executive protection, access control, and site-specific security solutions for banks, apartment communities, HOAs, retail properties, construction sites, healthcare facilities, warehouses, and more.

Unarmed Security
At Alterra Private Security Services, Unarmed Security Guards maintain a professional presence to deter unwanted activity while ensuring safety without the use of weapons. They conduct routine patrols, monitor surveillance systems, and assist employees, visitors, and clients with safety guidance. Access control is a key focus, verifying credentials and responding promptly to incidents while maintaining detailed logs and reports. Officers handle conflict situations calmly and professionally, ensuring compliance with building rules and safety policies. This service provides reliable security coverage in offices, retail spaces, and residential areas throughout all California cities.
A Leading Security Guard Company in California Backed by Experience

Security challenges continue to evolve, making it essential to work with a security provider that understands changing risks and delivers practical solutions. With more than 40 years of combined industry experience, Alterra Private Security helps businesses, property managers, and organizations create safer environments through reliable security services and responsive support.
Our team has decades of experience securing all types of properties, including but not limited to commercial buildings, warehouses, construction sites, healthcare facilities, apartment communities, retail centers, and industrial operations. Our security programs are designed to identify vulnerabilities, reduce risks, and support day-to-day operations.
We also have extensive experience supporting California’s warehousing and logistics industry. We secure the gate, provide truck access, and conduct perimeter patrols. We also monitor trailer yards and manage visitors in distribution centers throughout the Inland Empire and bordering regions.
Security is not a one-size-fits-all industry. We assess each property’s needs and operational, regulatory, and risk-related requirements to adapt our security services. This flexible method has fostered long-term, professional partnerships over the years.
Industries We Serve

Every industry faces unique security challenges. Alterra Private Security develops customized security programs that address each client’s operational needs, risk levels, and compliance requirements.
We proudly provide professional security guard services across the state, supporting businesses, residential communities, construction projects, healthcare facilities, warehouses, retail properties, & industrial sites. Our statewide coverage allows us to deliver responsive security solutions wherever our clients operate. Our licensed security professionals understand the unique security challenges faced by different industries and develop site-specific protection plans to help reduce risks, maintain safe environments, and support daily operations.
Areas we serve

Alterra Private Security provides security guard services throughout California, serving businesses, commercial properties, construction sites, warehouses, residential communities, healthcare facilities, and industrial operations. Our statewide coverage enables us to respond quickly while delivering consistent security services across both metropolitan and regional communities.
Need Security Guard Services Across California?

Whether you need ongoing on-site security, mobile patrol services, fire watch, construction site security, executive protection, or emergency security coverage, Alterra Private Security is ready to help.
Complete the consultation form to discuss your property’s security requirements with our experienced team. After reviewing your operational needs, risk level, and coverage requirements, we’ll recommend a customized security solution designed to protect your people, property, and assets across California.
Customized Security Plans
Rapid Response Across California
BSIS Licensed Security Guards
Statewide Coverage You Can Rely On
24/7 Service Availability
Dedicated to Your Safety & Peace of Mind
Frequently Asked Questions

Are your security guards licensed?
Yes. All Alterra Private Security guards are licensed and prepared to meet security needs in accordance with California law and security industry standards.
Does Alterra Private Security provide 24-hour security coverage?
Yes. We can provide 24-hour security, including overnight, weekend, and continuous on-site guard services.
Can security guards be deployed the same day?
Yes, in most cases. We can meet your security needs depending on your location, the type of security you require, and officer availability. We aim to provide security as quickly as possible, including same-day security services for emergency and short-notice requests.
Are your guards trained for emergency situations?
Yes. Our security personnel are trained in emergency response, incident management, communication, and conflict resolution.
Does Alterra Private Security provide overnight security services?
Yes. Our security personnel work overnight to monitor properties after business hours and respond to security issues that may arise during the night.
How Much Do Security Guard Services Cost in California?
The price of security guard services is determined by the type of guard, hours, location, level of risk, and required security services. Alterra Private Security will send you a custom offer for your property’s security needs. Contact us today!
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