On-Site Security Guards
A dedicated officer at your site for the hours you choose: what they do, when you need one, and how to scope the post.
A dedicated officer at your site
On-site security guards are officers stationed at your property for set hours to control access, watch for problems, patrol the site, respond to incidents, and document what happens. Choose on-site coverage when a site needs a person present, not just periodic checks: staffed entrances, busy lobbies, shipping gates, or high-value areas. Define each post, its hours, and its duties in writing, and agree on the records you will receive.
What on-site security guards do
- Control access: check IDs, badges, and vehicles against approved lists.
- Manage visitors and contractors: sign-in, host confirmation, and badges.
- Patrol the site: interior and exterior rounds at set intervals.
- Observe and report: doors, fences, lighting, safety hazards, and suspicious activity.
- Respond to incidents: call 911 in an emergency and follow the site escalation chain.
- Document the shift: daily activity reports, incident reports, and patrol records.
On-site officers observe, report, and deter. Their authority to detain anyone or use force is limited by state law and by your contract, so define what you expect in writing.
Common on-site post types
| Post type | Typical sites | What the officer needs |
|---|---|---|
| Lobby and front desk | Office buildings, medical offices, and multi-tenant properties | Visitor procedures, tenant lists, and a professional manner |
| Gate and access control | Distribution centers, plants, and construction sites | Delivery lists, vehicle checks, and gate log procedures |
| Roving on-site patrol | Campuses, business parks, and large facilities | A defined route, checkpoints, and a patrol frequency |
| Loss prevention | Retail stores and shopping centers | Clear rules on observation, reporting, and when to call police |
On-site guard, mobile patrol, or remote monitoring?
| Option | Best when | Limits |
|---|---|---|
| On-site security guard | A person must be present for set hours at entrances, lobbies, gates, or busy areas | The highest cost per hour; relief must be planned |
| Mobile patrol | Periodic checks are enough, often after hours or across several sites | Gaps between visits; response depends on the next visit or dispatch |
| Remote video monitoring | Cameras cover the key areas and alerts have a reliable responder | Blind spots, connectivity, and response time matter |
| Combined | A post is needed at the busiest point, with patrols or cameras covering the rest | Define who owns each task and how records are combined |
Many sites combine them: an on-site officer at the main entrance during business hours and a mobile patrol after hours.
When you need an on-site guard
- People and vehicles enter all day and need to be checked.
- Visitors, contractors, or tenants need a person to receive them.
- High-value goods or materials are stored or moved.
- Incidents have happened and a visible presence is needed.
- An insurer, a lease, or a customer contract requires staffed coverage.
- The site is too large or too busy for periodic checks alone.
How many officers one post needs
One post is not one officer. A post staffed 24 hours a day, 7 days a week needs 168 hours of coverage every week, roughly four to five full-time officers once days off, training, and relief are covered. A business-hours post of 40 hours a week can often be covered by one officer plus relief. Our security guard cost guide shows how hours turn into cost, with officer wages for California, New York, Texas, and Florida.
Write clear post orders
Every on-site post needs written post orders: the location, hours, duties, patrol route, access rules, escalation contacts, emergency steps, and the records to keep. Brief them out loud, check that the officer understood them, and update them when the site changes. Our post orders guide includes a sample.
Describe each post
Tell providers the location, hours, days, duties, armed or unarmed status, and the reports you need for each post. Our coverage brief lists what every provider will ask.
Know the post was worked
An on-site officer should leave a record of every shift: when they arrived, which rounds they completed, what they found, and when they were relieved. Agree on these records before the service starts. Our provider accountability guide explains how to review them.
Digital Guard Tour is separate patrol-verification software published by Trinity Guard LLC; it is not a security guard company. The companies we recommend use it, so their patrols are recorded electronically.
Confirm the provider and the terms
This website does not employ guards. Any agreement is between you and the company you select. Confirm qualifications, staffing, insurance, and terms directly; see our referral disclosure.
On-site security guard questions
What does an on-site security guard do?
An on-site security guard is stationed at your property for set hours to control access, manage visitors, patrol the site, report problems, respond to incidents, and document each shift.
What is the difference between an on-site guard and a mobile patrol?
An on-site guard stays at your property for the whole shift. A mobile patrol visits one or more sites at intervals, so there are gaps between visits. Many sites combine both.
How much do on-site security guards cost?
The cost is the provider's hourly bill rate multiplied by the hours of coverage. The bill rate is higher than the officer's wage; for reference, the national median wage for security guards was $18.28 an hour in May 2025. Use the cost calculator for an estimate and compare real quotes.
Do on-site security guards need to be licensed?
In most states, yes. Security officers and security companies are licensed at the state level, and the requirements differ. Verify the company's license in the official state registry.
Should on-site security guards be armed?
Most on-site posts are staffed by unarmed officers. Choose armed coverage only when the site's documented risk justifies it, and confirm the additional licensing and insurance it requires.
How many hours can one security guard cover?
One officer works a normal shift. Longer coverage requires relief officers. For a 24/7 post, plan on roughly four to five full-time officers.
Related pages
Ready for the next decision?
Describe each post, and we'll get back to you as soon as possible.