About Us
A disciplined standard for Puget Sound security
Diligence Security exists to be the accountable, professional alternative to the region's revolving-door security firms — a Team that protects people, not just property.
Who We Are
Diligence Security is a Washington State licensed Security Company headquartered in Puyallup, with a strong presence in Seattle and Officers deployed across Pierce, King, Snohomish, Kitsap, and Thurston Counties. We protect commercial, industrial, residential, and event Clients across the greater Puget Sound.
Our Mission
Lead. Serve. Protect. We redefine the security services industry by operating to the highest ethical and environmental standards while protecting our Clients, our Employees, and our Communities with pride and professionalism.
Our Core Values
Every Officer is hired, trained, and evaluated against four values that define who we are.
Adaptive
Our Officers meet each site, each shift, and each situation on its own terms — reading the environment and adjusting instead of applying a template.
Ethical
We hold Officers to a professional and moral standard higher than the state minimum. Discretion, honesty, and fairness are non-negotiable.
Dependable
When the alarm trips, the sprinkler system goes offline, or your regular Officer calls out, our Team shows up. That reliability is our reputation.
Diligent
Every Patrol, Security, and Fire Watch Log is complete, timestamped, and shared digitally. Detailed documentation is how we prove coverage and reduce liability.
Our Approach
Diligence Security invests in training as our product. Every Officer completes the Officer Integration Program (OIP), a multi-day curriculum that goes well beyond the Washington State minimum. OIP 1 establishes Washington licensing law, the Task Priority Continuum, use-of-force limits, de-escalation, emergency response, medical training, Fire Watch Officer certification, and professional report writing. OIP 2 develops advanced communication, behavioral profiling, and crisis intervention for Officers who complete probation.
Every site receives an agreed Site Instructions document and digital Patrol, Security, and Fire Watch Logs the Client can view in real time. You get proof of coverage, not promises.
What We Do
Our services span Mobile Patrol Officers, On-site Security Officers, 24/7 Emergency Response, Certified Emergency Fire Watch, and Event Security across Five counties.
Explore More
Read our Officer Training (OIP), our Frequently Asked Questions, explore Careers, or Get in Touch.
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.