Diligent Security Services
Commercial services · San Bernardino, California
Find prospects like Diligent Security Services
Get a list of similar companies, matched by industry, size and location, ready for outreach.
Free sample of 25 companies by email within one business day. No spam: we only use your email for this request.
Products & Services
About Diligent Security Services
Security guards, mobile patrol and event security for Inland Empire businesses since 2013. Trained personnel, rapid response and tailored plans. Diligent Security Services is listed as a company reporting $1M-$5M in annual revenue, classified under Investigation and Security Services, based in San Bernardino, California, United States, operating in Office service and employing 11-20 people.
Its primary NAICS classification is 561612 (Security Guards and Patrol Services). Diligent Security Services is one of 2,121,238 Industrial & mechanical companies listed in California.
Business Contact Information
- Phone
- +1 (909) 2691230
- Fax
- +XXX (909) 4947604
- facebook.com/diligentllc
- Address
- 1881 E Commercenter Cir, San Bernardino, California, 92408, United States
Industry & Classification
- Industry
- Industrial & mechanical
- Sector
- Commercial services
- Segment
- Office service
NAICS Codes
- 56Administrative and Support and Waste Management and Remediation Services
- 5616Investigation and Security Services
- 561612Security Guards and Patrol Services
SIC Codes
- 73Business Services
- 738Miscellaneous Business Services
- 7381Investigation Services
Company Details
- Employees
- 17 (11-20)
- Annual Revenue
- $2.9M ($1M-$5M)
Diligent Security Services: frequently asked questions
What does Diligent Security Services do?
Security guards, mobile patrol and event security for Inland Empire businesses since 2013. Trained personnel, rapid response and tailored plans.
Where is Diligent Security Services located?
Diligent Security Services is headquartered at 1881 E Commercenter Cir, San Bernardino, California, 92408, United States.
How many employees does Diligent Security Services have?
Diligent Security Services has about 17 employees (the 11-20 range).
What is Diligent Security Services's annual revenue?
Diligent Security Services's annual revenue is estimated at $2.9M (the $1M-$5M range).
What industry is Diligent Security Services in?
Diligent Security Services is in the Industrial & mechanical / Commercial services industry, and its primary NAICS code is 561612 (Security Guards and Patrol Services).
How can I contact Diligent Security Services?
Its website is www.diligentsecurityservices.com and its phone number is +1 (909) 2691230.
What companies are similar to Diligent Security Services?
Other large industrial & mechanical companies in California include State of California, TD SYNNEX Corp, University of California and Ingram Micro Holding Corp.
Largest industrial & mechanical companies in California
Largest companies in California
Largest industrial & mechanical companies
Manufacturing sales in California, 2026
In California, Factur's 2026 study counted 98 manufacturing quotes worth $14.7M and 18 purchase orders over 12 months: 18% of quotes became orders, against 21% nationally. See the California data.
Own this business?
Keep your profile accurate — or ask us to take it down. We acknowledge requests within 7 days and resolve them within 30 days.
Prefer email? privacy@facturmfg.com
Add this badge to your website — show visitors you're listed on Factur Data.