60+ Years of

licensed. professional. experienced.

Ontario, Chino, and Claremont's Trusted Security Guard Company Since 1997

Guardian National Security is a licensed private patrol operator and C7 contractor in good standing with the California Bureau of Security and Investigative Services (BSIS) and Contractors State License Board. We have an extensive list of satisfied customers throughout Southern California, including many in Ontario, and maintain an A+ rating from the Better Business Bureau. Additionally, we are fully bonded and exceed California’s insurance requirements for general liability, commercial auto liability, and workers’ compensation coverage.

Our staff consists of our highly experienced security professionals. Our security guards have all passed an exhaustive screening and interview process and received their guard card from California’s Bureau of Security and Investigative Services. Additionally, they receive initial and ongoing training in observe and report, powers to arrest, terrorism and weapons of mass destruction awareness, post order duties, patrol, PR, communications, emergency situations, CPR and first aid, and other security topics that are important to our clients. Our guards are supervised by an experienced management team with over 60 years of collective experience who ensure that we maintain our high level of service day in and day out.

Contact us today by phone or via our online contact form to obtain a free consultation and immediate quote. We are available 24 hours a day, 7 days a week and are prepared to outbid any of our competitors.

Professional &

Security Guard Services


We specialize in developing security strategies that effectively reduce theft, vandalism, trespassing, employee pilferage, and other criminal activity in retail stores, malls, and shopping centers. »


Whether you need nightly lock-up and alarm services, parking lot patrol, or temporary fire watch services, we have the skills and expertise to provide a cost-effective security solution to meet your priorities. »


Our highly trained and licensed guards can be trusted to keep valuable machinery and equipment secure or to protect against vandalism, graffiti, trespassing, and other unwanted activity. »


Guardian National Security is thoroughly prepared to provide a wide range of transportation and logistical security duties for your trucking company, loading dock, or rail yard. »


We’re proud to provide unparalleled security guard services for homeowner associations, gated communities, apartment complexes, condominiums, and communities of all sizes.


Our Process

At Guardian National Security, we are committed to providing individually-tailored security plans to every customer at an affordable cost. In order to best serve the unique needs of our clients, we have developed an efficient multi-step process for designing, implementing, and monitoring custom security plans.

Free Consultation


We will thoroughly discuss your security needs and concerns in order to understand your property.

Proposal & Quotes


We guarantee to match or beat any competitor’s quote for the same services.

On-Site Follow Up


One of our security advisors will complete a thorough on-site walk-through at your location.

Customized Security & Patrol Plans


We will delineate patrol routes, schedules & post orders based on your specific needs.

Guards to Arrive On-Time, In Uniform & Ready to Work


You can expect your assigned guards to arrive on-time, in uniform, and ready to work.

Daily Activity Reports, Incident Reports & Parking Violation Warnings


We provide clients with daily activity reports, incident reports, and parking violation warnings.

Protecting California's Most Recognized Brands

Brookstone Logo Burger King Logo Kohl’s Logo Southern California Edison (SCE) Logo Starbucks Coffee Logo Bank Of America Logo


Guardian National Security

Trained, BSIS-Licensed Security Guards


Expertly-Trained, BSIS-Licensed Security Guards

Superior Customer Care


Exceptional Customer Service Available 24/7

Competitive Pricing


We Match or Beat Any Competitor’s Quote

Private Security Services, Ontario, Chino, and Claremont, CA

We firmly believe that every Ontario, Chino, and Claremont business needs to have security designed specifically for their needs. This means that we not only invest the time necessary to understand a company’s threats, risks and vulnerabilities, but that we also consider security issues that are common among their industry. For example, those in construction often deal with equipment and material theft, while those producing events have to worry about crowd control, and universities which to have guards who enforce campus rules while providing a friendly appearance and a variety of helpful services.

To work with security experts and guards who understand the needs of your industry, hire Guardian National Security. We specialize in serving the following industries present in Ontario, Chino, and Claremont:

  • Construction
  • Property Management
  • Hospitality (Hotels/Motels)
  • Television & Film
  • Manufacturing
  • Parking
  • Retail
  • Nursing Homes
  • Health/Medical
  • Education
  • Banking
  • Transportation
  • Bar and Restaurant

Call today. We’d be happy to provide you with a free initial consultation to determine the security strategies that would best serve your facility.

Mobile Patrol Services in Ontario, Chino, and Claremont, CA

Guardian National Security’s mobile patrol services are cost-efficient, very visible, and extremely effective at improving security and safety on large premises in Ontario regardless of whether they are performed on foot or by bike, golf cart or vehicle. We offer our mobile patrol service on both short and long term bases, and for sites of any size or type. To determine the best way to implement this program, one of our security professionals will meet with you at your Ontario, Chino, or Claremont site and design a customized security plan and patrol route to most effectively and cost-efficiently address your security concerns and identified or potential threats. Call today to schedule your on-site consultation.

Short- & Long-Term Standing Security Guard Services

Guardian National Security provides Ontario, Chino, and Claremont businesses with cost-effective and reliable standing security guard services. This service consists of having security personnel posted at one or more positions throughout your site who are solely dedicated to your site’s safety and security. Our guards can be hired for a few hours, a day, or for an extended amount of time. They can also be instructed to perform a number of specific post order duties, such as monitor entry access, provide validation stickers, issue visitor badges, search bags and belongings, maintain visitor logs, keep inventory/truck logs, and more. To learn more about our standing security guard services available throughout Ontario, Chino, and Clarement, call us today.

Event Security Ontario, Chino, Claremont, CA — Ideal for Black Tie Events, Corporate Events, Concerts, Fairs, Conventions, and More

Guardian National Security’s private security guards are licensed by the Bureau of Security and Investigative Services and trained in all aspects of event security, including but not limited to:

  • crowd control
  • crowd management
  • evacuation planning
  • fire watch
  • activity logs and incident reports
  • standing security guard and mobile patrols
  • alarm and emergency response
  • door supervision
  • access control
  • bag searches
  • parking control and enforcement
  • customer service
  • security escorts

Our professional guards minimize your risks and losses while ensuring a safe environment for your patrons. Call today for a customized security strategy and plan for your next Ontario, Chino, or Claremont event.

Ontario, Chino, and Claremont, CA – Logistics & Supply Chain Security Services

Guardian National Security is proud to have provided Ontario, Chino, and Claremont businesses with highly specialized logistics and supply chain security services to meet their needs and budget. Our logistics and supply chain security services not only improve safety and security throughout their site, but also significantly reduces shrinkage. These services are customized designed to each company’s circumstances, but generally includes qualified guards who perform mobile patrols, truck inspections, dock designation, timekeeping, shipping inventory management, and material tracking. Additionally, our guards can help with the added workload involved with Cal-OSHA audit requirement fulfillment. Call today for a free price quote and consultation.

Code-Compliant Fire Watch Services in Ontario, Chino & Claremont

With our fire watch services, you will get a dedicated professional security guard who will diligently tour your site and keep watch for early signs of fire or other hazardous situations. This service is critical if you wish to operate your business when your fire alarm or sprinkler system is down or under maintenance. It can also be required by a fire code official if you plan to host an event or assembly in Ontario where public safety appears to be at risk. Our fire watch services are reasonably priced, reliable, and compliant with California’s Fire Code. Call today for a quote.

Guard Services with Security Equipment Installation & Surveillance

Guardian National Security is a C7 licensed contractor and an expert in the installation and placement of security alarms, motion sensors, video surveillance cameras, and other CCTV systems. Our security equipment is available for rent on a short- or long-term basis and always affordably priced. Each wireless security equipment installation and surveillance service in Ontario, Chino, or Claremont comes packaged with guard, and can be provided in conjunction with some of our other security services, such as our 24-hour alarm monitoring and response and mobile patrol service. To determine what will best suit your security needs in Ontario, Chino, and Claremont, call today.

Vehicle Patrol with Open/Lock Up Services, Available in Ontario, Chino, and Claremont, CA 

One of the most economical and effective ways to secure your business site in Ontario, Chino, or Claremont is to invest in opening and lockup services. This type of service is intended to provide you with an elevated level of security and safety that just isn’t possible when you have an untrained employee locking up or opening your building. Our guards are not only highly trained and experienced, but also certified by the State of California’s Bureau of Security and Investigative Services. They arrive at your site, dressed in uniform, and are 100% dedicated to properly securing your site. Our vehicle patrol guards thoroughly inspect your premises as well as all entry points before locking or unlocking your building. Additionally, we supplement this service with 24-hour alarm response services. Call today for a free quote.

Ontario, Claremont, and Chino’s Best Choice for Alarm Response Services – 24-Hour Monitoring & Dispatch

Trust Guardian National Security to monitor and investigate alarms on your Ontario, Chino, or Claremont property. We operate 24 hours a day, 365 days a year, and have the resources and capacity to respond to triggered alarms at a moment’s notice. Our alarm response services come packaged with vehicle patrol, so that any time your alarm is triggered, one of our local guards will be dispatched to your site and thoroughly investigate what caused the alarm to go off and determine if the police or fire department needs to be called. Our guards will also complete a detailed incident report for your records. Call us today for a fast, free quote. We will gladly meet or beat any competitor’s quote.

Guardian National Security Services gave me so much peace of mind. They were able to secure my office building efficiently and professionally.

SAL A. Via Google

free on-site security assessments

Call Today to Talk to One of Our Private Security Experts

Call today and you’ll receive a free consultation with one of our security experts. Consultations can be done over the phone, but are most effective when they are performed on site. During an on-site consultation, we’ll survey your property and learn about your specific security concerns, vulnerabilities and budget. Then, we’ll provide you with a proposal that will give you the most-effective security at the best price. We are so committed to this that we guarantee to match or beat any competitor’s price for the same services.

Custom-Made, Personalized Security Plan

Guardian National Security Chino, Claremont, Ontario – 91708, 91709, 91710, 91711, 91758, 91761, 91762, 91764, California (CA)
Area code (714, 909, 951)