🗺️ 180+ Communities Across San Diego County · Since 2002

Security Guard Services Across All of San Diego County

MT Security & Investigations is based in Spring Valley and serves every community across greater San Diego County. South Bay, East County, North County, downtown — same professional armed guards, HOA patrol, private investigation, and asset protection everywhere. Find your community below or call us if you don’t see it.

Get a Free Assessment for Your Area → 📞 (619) 765-2222

✅ All San Diego County ✅ 24+ Years Local Experience ✅ 24/7 Availability ✅ Founded by Retired CVPD Officer

Top Service Cities

Where We Run the Most Patrols

Click your city for a dedicated page about the services we offer there, local response times, and answers to the most common questions.

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Spring Valley

Our hometown base. Fastest response times. Armed guards, HOA patrol, PI services. East County's local security company.

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Chula Vista

South Bay's fastest-growing city. HOA patrol, armed guards, commercial security, and PI services throughout Chula Vista and Otay Ranch.

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El Cajon

East County commercial hub. Retail security, warehouse patrol, workers' comp investigation, and construction site protection in El Cajon.

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National City

South Bay security for auto dealerships, commercial corridors, and residential communities. Armed guards and PI services in National City.

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Santee

Suburban East County security for HOA communities, commercial properties, and warehouses in Santee and surrounding communities.

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Escondido

North County inland coverage for agricultural properties, wineries, medical offices, and commercial businesses in Escondido.

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Lemon Grove

Lemon Grove neighbors. Minutes from our Spring Valley HQ — our fastest East County response. HOA patrol, guards, and PI services.

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La Mesa

Heart of East County. Downtown Village patrols, commercial guards, HOA contracts, and event security across La Mesa.

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South Bay & SD South

16 communities

📍 Bonita 📍 Castle Park 📍 Chula Vista 📍 Coronado 📍 Eastlake 📍 Egger Highlands 📍 Imperial Beach 📍 Lincoln Acres 📍 National City 📍 Nestor 📍 Otay Mesa 📍 Otay Mesa West 📍 Otay Ranch 📍 Rancho del Rey 📍 San Ysidro 📍 Tijuana River Valley

Central, East & Southeast SD

72 communities

📍 Allied Gardens 📍 Alpine 📍 Balboa Park 📍 Bankers Hill 📍 Barrio Logan 📍 Bay Ho 📍 Bay Park 📍 Bay Terraces 📍 Bostonia 📍 Casa de Oro 📍 Chollas View 📍 City Heights 📍 College Area (SDSU) 📍 Crest 📍 Dehesa 📍 Del Cerro 📍 Downtown San Diego 📍 East Village 📍 El Cajon 📍 Emerald Hills 📍 Encanto 📍 Eucalyptus Hills 📍 Gaslamp Quarter 📍 Golden Hill 📍 Granite Hills 📍 Grant Hill 📍 Grantville 📍 Harbison Canyon 📍 Hillcrest 📍 Jamul 📍 Kearny Mesa 📍 Kensington 📍 La Mesa 📍 Lake Murray 📍 Lakeside 📍 Lemon Grove 📍 Lincoln Park 📍 Linda Vista 📍 Little Italy 📍 Logan Heights 📍 Marina District 📍 Memorial 📍 Midtown San Diego 📍 Midway District 📍 Mission Hills 📍 Mission Trails 📍 Mission Valley 📍 Morena 📍 Mount Helix 📍 Mountain View 📍 Normal Heights 📍 North Park 📍 Oak Park 📍 Old Town 📍 Paradise Hills 📍 Rancho San Diego 📍 Ridgeview 📍 Rolando 📍 San Carlos 📍 Santee 📍 Serra Mesa 📍 Sherman Heights 📍 Skyline 📍 South Park 📍 Southcrest 📍 Spring Valley 📍 Stockton 📍 Talmadge 📍 University Heights 📍 Valencia Park 📍 Webster 📍 Winter Gardens

SD Coastal & Beach

16 communities

📍 Bird Rock 📍 Del Mar Heights 📍 Fleetridge 📍 Harbor Island 📍 La Jolla 📍 La Jolla Shores 📍 Loma Portal 📍 Mission Beach 📍 Ocean Beach 📍 Pacific Beach 📍 Point Loma 📍 Roseville-Fleetridge 📍 Shelter Island 📍 Torrey Pines 📍 Windansea 📍 Wooded Area (Point Loma)

North County (Coastal + Inland)

35 communities

📍 Aviara 📍 Bonsall 📍 Camp Pendleton Area 📍 Cardiff-by-the-Sea 📍 Carlsbad 📍 Deer Springs 📍 Del Mar 📍 Elfin Forest 📍 Encinitas 📍 Escondido 📍 Fairbanks Ranch 📍 Fallbrook 📍 Harmony Grove 📍 Hidden Meadows 📍 La Costa 📍 Lake San Marcos 📍 Leucadia 📍 Murrieta 📍 Oceanside 📍 Olivenhain 📍 Pala 📍 Pauma Valley 📍 Rainbow 📍 Ramona 📍 Rancho La Costa 📍 Rancho Santa Fe 📍 Rincon 📍 San Elijo Hills 📍 San Luis Rey 📍 San Marcos 📍 Solana Beach 📍 Temecula 📍 Twin Oaks Valley 📍 Valley Center 📍 Vista

Don’t See Your City?

If your community isn’t listed above, call us — we almost certainly cover it. Quotes are free. We answer 24/7.

Get a Free Assessment → 📞 (619) 765-2222