Professional Diligence Security Officer in full uniform standing with a marked patrol vehicle and Mount Rainier in the background for visible deterrence

Washington State24/7 ResponseAdvanced Training

Professional Protection for the People who Run Western Washington

Diligence Security protects people first — through structured Mobile Patrols, On-site Officers, and Rapid Emergency Response across Pierce, King, Thurston, Kitsap, and Snohomish Counties and most of the Puget Sound.

The Diligence Security difference

A disciplined alternative to standard security firms

We combine local leadership with high-tech accountability for owners and managers who need documented results — not a name on a clipboard.

GPS-tracked & documented

Every patrol and inspection is GPS-verified, with digital reports and photos shared with your Team in real time.

Local, rapid deployment

Headquartered in Puyallup, our Supervisors are rarely more than 45 minutes from your site.

Advanced Officer training

Officers receive far more than the industry standard through our Officer Integration Program, emphasizing de-escalation and disciplined decision-making.

Compliance-ready

Documented protection that satisfies Fire Marshal, regulatory, and insurance requirements.

Diligence Security Officer standing guard beside a marked patrol vehicle in Tacoma

Where we work

Serving the greater Puget Sound region

High-visibility patrols and dedicated On-site Security across five counties — Pierce, King, Thurston, Kitsap, and Snohomish. Choose a region to see our local coverage.

Proven in the field

How Our Coverage Performs for Real Clients

Documented outcomes from deployments our Team runs across the Puget Sound region — in Clients’ own words where they have given us permission to share them.

Non-profit Healthcare Network

Multi-site Healthcare Coverage That Lowered Use-of-Force Incidents

The Situation
A non-profit healthcare organization with five health centers and an administration building across Pierce County had inherited a security program from a previous provider that leaned on physical intervention. Staff were absorbing the stress of unpredictable encounters in patient areas, entryways, and parking structures.
Our Response
Diligence Security took over the program with a layered model: posted On-site Officers at the highest-traffic facilities, roaming Mobile Patrols connecting the remaining sites, and 24/7 emergency response for escalations after hours. Every Officer assigned to the account completes our Officer Integration Program, where verbal de-escalation and disciplined decision-making are trained well beyond the state minimum.
The Outcome
Use-of-force incidents dropped dramatically compared with the previous security company, and criminal activity on the properties was reduced. Just as importantly, the organization's employees report a markedly better sense of security while they work. This remains our longest-standing Client relationship.

It is my pleasure to recommend Diligence Security for your security needs. We have been contracted with Diligence Security for the past 3 years and have been very satisfied with their excellent service and rapid response to our security needs. Diligence Security currently provides on-site security for 5 health centers and administration building locations that are spread throughout Pierce County. They also provide additional day-time security patrols to all sites and provide after-hours response when called. The patrol officers are professional and respond rapidly in an appropriate manner while providing a visual deterrent to potential crime at our locations. Diligence Security has been a proactive partner with the Community Health Care team to create improved communication and reporting at all of our locations and helps identify security deficiencies. We are highly satisfied with the security services provided by Diligence Security. They are a reliable, professional, and results-oriented security partner. We highly recommend them to you for your security needs.

Letter of recommendation, Community Health Care — Pierce County, WA

Multifamily Apartment Community

Emergency Standby Coverage During a Serial Arson Threat

The Situation
An apartment community was targeted by an arsonist setting fires in rapid succession, leaving residents exposed and building systems compromised while ownership scrambled for contractors.
Our Response
Diligence Security deployed Officers on an emergency basis and held continuous coverage of the affected buildings — watching the vulnerable areas, documenting each round, and giving management and residents a visible presence during the highest-risk hours.
The Outcome
Coverage was sustained without interruption until the necessary repairs were completed and the property could stand on its own systems again. The deployment gave management a documented record of the response for its insurer and residents.

Live Music Venue

Event Coverage That Let the Show Go On

The Situation
A venue needed to host live music events with confidence that crowd behavior, entry points, and restricted areas would be managed without souring the atmosphere for guests.
Our Response
Diligence Security supplied uniformed Event Officers built around access control — staffed entries, monitored capacity and restricted areas, and a calm, professional posture in the crowd rather than a confrontational one.
The Outcome
The venue held its events with no incidents involving our coverage, and our presence has become part of how they plan future shows.

Protect your people with a Team you can trust and verify.

Request a professional site evaluation or immediate emergency deployment. Local Supervisors respond fast across the Puget Sound.