60+ Years of

personalized. professional. affordable.

Private Security Services in Oceanside, San Marcos, and Mira Costa, CA

Our private security services include standing guards, mobile patrols, lock up and alarm, security equipment installation and 24/7 alarm monitoring and response. All of these services are available for short-term and long-term assignments and are fully customizable. We frequently modify our services to match the specific preferences of our clients or to reflect what we feel will best serve the client based upon our onsite security needs assessment. We’ve worked with event organizers, construction companies, executive offices, banks, malls, retail stores, business centers, parking management companies, schools, hospitals, group living facilities, HOAs and many other clients over the years. We have extensive training in all aspects of private security and we’re able to give security solutions that are highly effective at preventing crime, discouraging unwanted behavior, keeping people and property safe and secure.

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

Oceanside, California, Security Guard Services: Great for Gated Communities, Businesses & Events

If you’re looking to invest in security/guard services at your Oceanside, California, location, call Guardian National Security. We stay current with local crime trends and frequently help those in Oceanside find ways to discourage and reduce theft, burglary, assault, trespassing, vandalism and other crimes and unwanted activity. Additionally, we offer both short-term and long-term security services, so you’ll be able to get the support you seek for as long as you need it. A short-term contract is usually ideal for when you need access and crowd control at an event, have something of high value that requires additional protection, require dedicated fire watch services while your fire alarm system is under maintenance, or when a door or window has been broken and you need to keep your store secure until it is fixed. Long-term contracts are typically for clients who need on-going guard support or alarm monitoring and response services. Such services have been used at hotels, shops, hospitals/medical centers, retirement facilities, corporate offices and parking lots. Call today to tell us about your private security needs in Oceanside, California.

Private Security Services for San Marcos and Mira Costa, CA

In looking at recent reports and crime statistics published by the Mira Costa College Police Department and California State University Police Department at San Marcos, Mira Costa and San Marcos are relatively safe places to live and work. However, recent news highlights problems with graffiti, drugs and vandalism, which means that the community needs to stay vigilant if they want to prevent these problems from growing. To help address these issues, Guardian National Security provides a full range of private security services, including 24-hour mobile patrol services (in a vehicle, on a bike, on foot or in a golf cart), standing guard services, night watchmen, event security (bag check, crowd control, access control, etc.), alarm monitoring and response and more to individuals and businesses in Mira Costa, San Marcos, and surrounding areas. Call today and learn more.

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

call today!

Free On-Site Security Assessments & Quotes

Call (800) 700-1467 today to learn more. If you’d like an estimate, we’ll need to know which services you are interested in, what your security goals are and what industry you’re in/what type of property you have. With this information, we’re usually able to provide a draft proposal and estimate right over the phone. If you wish to move forward, we’ll then need to conduct an in-person meeting and do a walkthrough of your site. This on-site meeting helps us to refine our proposal, determine the post orders/duties for your guard(s) and ensure that our guard services are truly going to meet your needs. Then, once a contract is signed, we’ll move forward with selecting and training your assigned security guard.

Guardian National Security is a licensed and insured private security company that specializes in guard services and patrols. We also are licensed to install low-voltage CCTV, motion detectors and other security equipment.

Custom-Made, Personalized Security Plan

Guardian National Security Oceanside, Mira Costa – 92029, 92049, 92051, 92052, 92054, 92056, 92065, 92069, 92078, 92079, 92096, California (CA)
Area code (442, 760)