Commercial and government security, done right since 1985.

Security, video, fire, and access control, with AI built into the systems we install.

Now hiring techs and project managers. See careers

  • Privately owned & independent
  • UL2050 certified
  • 24/7 on-call techs
  • Thousands of projects
  • MD/DC/VA, working nationwide

Our specialties

White-glove service on every job. Especially the ones that leave no room for mistakes.

Managed Security Services

We host, monitor, and manage your access control and video, so your system stays current and someone is always watching its health.

How it works

Government & SCIF

UL2050 certified SCIF installations and FICAM-compliant access control for defense and government agencies and their contractors.

Talk to us about your facility

Data Center & Mission-Critical

Security for live data halls and phased buildouts, led by a president who spent nearly two decades building data center infrastructure and holds an RCDD credential.

Talk to us about your site

Cabling, Door Hardware & Networks

We perform our own structured cabling, electrified door hardware installations, and security network design and programming. One team owns the whole job.

Talk to us about your project

AI-powered security systems

Today's cameras, access systems, and intercoms do far more than record and unlock. AI does the watching, so your team doesn't have to.

Search hours of video in seconds

Type “person in a red jacket near the loading dock” and find it, instead of scrubbing footage. Spot vehicles and plates at gates and garages, too.

Access systems that spot the unusual

Find any door or badge event in seconds, and get flagged when something looks off, like a badge used at 3 a.m. or a door propped open.

Intercoms that answer for you

AI can greet visitors, answer common questions, and route the call when no one is at the front desk.

Stop trouble before it starts

Alerts for loitering and after-hours activity, and cameras that play a live warning to trespassers before any damage is done.

We help you choose, install, and set up the AI features that fit your site.

Ask about AI features

Managed security built around your building

Protect+

For building managers, site managers, and single tenants

The easy button. One monthly cost covers your maintenance agreement and system management.

Ask about Protect+
  • The right system for you, not for usWe're not tied to one manufacturer. We look at your building, your team, and your budget, then recommend what fits.
  • Tenants have a choiceIn a managed building, you don't have to use the building's integrator. We install your own system that works with building-issued credentials, managed by you or by us.
  • Hosted for youOur own hosted LenelS2 NetBox system, plus cloud platforms from Brivo, Verkada, Eagle Eye, and 2N. No servers to buy or babysit.
  • Card administrationWe add, change, and remove badges, and manage the settings behind them: access levels, time zones, and temporary or holiday schedules. Your staff doesn't have to.
  • System health monitoringWe spot offline cameras and doors before you do.

What we install and support

Access Control

Card, mobile, and visitor access for doors, floors, and whole buildings.

Video Surveillance

Cameras with AI search and smart alerts, viewable from anywhere and recorded on site or in the cloud.

Intrusion / Fire Alarms

Burglar and fire alarm systems, monitored around the clock.

Intercom / Telephone Entry

Video intercoms and telephone entry for lobbies, gates, and door access.

Vehicle Gates

Gate operators and access for parking lots, garages, and secure yards.

Mobile Security Trailers

Cameras spot trespassers and play a live warning automatically, no guard needed. Rented monthly for construction sites. Get a quote

24/7 Monitoring

Intrusion, fire, and elevator monitoring, day and night.

Service & Maintenance Agreements

Scheduled checkups and priority repairs to keep your system running.

“Your staff arrived on time, were respectful as always, and got right to work without disruption. As always, United Rocks!”
Physical Security Manager, ASRC Federal

Manufacturer partners

We work with many manufacturers, so we can recommend the one that fits.

See how we work with each partner

Privately owned. Owner-operated. Since 1985.

Our missionTo build safe, secure, and connected communities through integrated security solutions, delivered with consistent integrity and uncompromised craftsmanship.

While private equity buys up security companies across the region, we've stayed independent. Our customers work with the same people year after year, and the owner answers to them, not to investors.

Our president, Doug Horensky, has spent more than 40 years in low-voltage systems, from parking control and structured cabling to data centers and security. He leads a team that works as a trusted partner: early in planning, reliable in execution, and accountable through operations.

Trusted by

  • ASRC Federal logo
  • Choice Hotels logo
  • Clark Construction logo
  • COPT Defense Properties logo
  • Eli Lilly logo
  • Friendship Public Charter Schools logo
  • George Washington University logo
  • JLL logo
  • Mill Creek Residential logo
  • National Aquarium logo
  • PCAOB logo
  • Textron logo

Also trusted by the US Air Force, US Army Corps of Engineers, US Navy, US Coast Guard, US Department of Justice, and the City of Fairfax.

Our customers know our techs by name.

“A gigantic thank you to Smokey, a real superstar.”
Security Manager, Friendship Public Charter Schools

We're hiring qualified technicians and project managers who take pride in their work and want to be known for it.

  • Competitive pay
  • Company vehicles
  • 401(k)
  • Paid vacation
  • Medical benefits
United Security technician on a lift wiring cameras in a warehouse

How can we help?

Prefer to talk? Call 301.952.8724.

Looking for a job? See Careers