60+ Years of

Alhambra, Monterey Park & La Crescenta's #1 Choice

Security Guard & Patrol Services

Over the years, we have supplied our private security guards to protect and secure gated neighborhoods, private parking lots, retail stores, hospitals, grocery stores, theatres, fitness centers, hotels, high-rise corporate office buildings, restaurants, private events, festivals, construction sites, warehouses and more in the San Gabriel Valley and Los Angeles County area. In addition to patrolling their property and/or standing watch, our security guards were also able to take on a number of other valuable post duties, including but not limited to:

  • access control
  • bag and belonging searches
  • keeping activity logs
  • tracking truck arrival/departure
  • dock designation for deliveries
  • monitoring CCTV security cameras and motion detectors
  • responding to alarms
  • issuing parking passes
  • towing unauthorized vehicles
  • customer service

Serving All of Los Angeles County, CA

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 in La Crescenta-Montrose, Monterey Park, Alhambra, and Surrounding Areas

Private security services can help deter crimes, minimize risk, and create safer environments. For areas with relatively low crime rates, such as La Crescenta, guard services can also help support a number of activities that can bog down or be hard to delegate to your existing staff. Such activities might include securing your premises, keeping watch over particularly valuable inventory, setting the alarm, watching surveillance cameras, giving access to delivery trucks, performing bag and belonging searches, performing fire watch duties and more. To learn more, give us a call. We’ll meet you at your location to provide you with a comprehensive security assessment and custom quote at no cost.

Find Out Why Guardian National Security Is Monterey Park’s Private Security Company of Choice

Whether you own a business or manage a large condominium in Monterey Park, California, Guardian National Security can help you deter crime, manage conflicts, improve safety, discourage employee pilfering, help manage crowds at large events and more. We have fully licensed security guards ready to be dispatched 24 hours a day. These guards can lock up buildings, respond to alarms, patrol neighborhoods or other large areas, or be assigned to a location for an ongoing, long-term assignment. Additionally, we can supplement our guard services with security cameras, alarms and motion detectors. Learn more about these and other private security services we offer Monterey Park and other San Gabriel Valley cities by giving us a call today.

24-Hour Private Security for Alhambra, California — Perfect for Car Dealerships, Private Parking Lots, Apartment Complexes, Construction Sites, Warehouses & More

If you’re interested in contracting private security services at your Alhambra location, call Guardian National Security today. We work with residential and commercial clients throughout the San Gabriel Valley region of Los Angeles County, and offer short- and long-term security services at competitive prices. What sets us apart from other private patrol operators is that we will customize our security guard services to meet each client’s unique need. For example, for a standalone car dealership on a tight budget, we might recommend 24/7 alarm response or nightly patrol service; but a cluster of car dealerships might be able to consolidate their security budgets and afford patrols during the day and an on-site guard at night. Call today to start exploring a security solution for your Alhambra location.

Private Event Security for Alhambra, Monterey Park, & La Crescenta-Montrose, California

The private event security services that we provide to Alhambra, La Crescenta-Montrose and Monterey Park are perfect for fundraisers, walk/run events, grand openings, gallery showings and festivals/parades such as the San Gabriel Valley Lunar New Year Parade and Festival. For each event, we’ll help you customize our security guards’ appearance, and assign you guards whose experience and personality will complement your event.

What our

Clients Have to Say

Guardian National Security is committed to providing reliable, quality protection services to a variety of industries through custom-designed security strategies, expertly trained security guards, and excellent customer service.

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

Join 1,000s of satisfied clients

Call Guardian National Security Today for a Free Consultation & Quote

All of our private security guards meet licensing requirements set by the Bureau of Security and Investigative Services (BSIS) and carry active guard cards. They also are required to meet our own exhaustive screening process that includes interviews with management personnel, drug tests and reference checks. Once hired, our guards receive ongoing training and must meet our high standards for professionalism.

Call licensed and insured Guardian National Security today for all your private security needs in La Crescenta, Alhambra and Monterey Park.

Custom-Made, Personalized Security Plan

Guardian National Security Monterey Park, Alhambra, & La Crescenta – 91020, 91214, 91754, 91755, 91756, 91801, 91802, 91803, California (CA)
Area code (323, 626, 818)