Diamond Bar

Personal Injury Attorney & Accident Lawyer

TROPHY

LAW FIRM

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MULTI-MILLIONS

recovered. hard fought. hard earned.
Welcome to The Guerrero Firm

Your Case Is Our Cause, Every Time

Your Fight. Our Purpose.


At THE GUERRERO FIRM, we believe every accident victim deserves fierce advocacy, personalized care, and unwavering dedication. For more than 20 years, our lead attorney Rendell M. Guerrero has stood beside injury victims, fighting tirelessly for the justice and compensation they deserve.

Car Accident in New York City
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Why We Do What We Do


Born from Witnessing Injustice
Early in his career, Rendell saw firsthand how accident survivors struggled—facing pain, uncertainty, and powerful insurance companies alone. In Philippines "Kuya" means big brother. That experience became his calling: to be
 Kuya Rendell these families desperately needed.


Outworking the Opposition
Insurance giants count on victims giving up. We don't. Rendell's commitment goes beyond the courtroom—he's visited clients in hospitals, at their homes, worked late into the night on case files, and stood firm through every challenge. With the resources to take cases all the way to trial and verdict, we refuse to be outworked.


Battle-Tested Experience
Hundreds of successful cases have sharpened Rendell's ability to navigate even the most complex claims. Whether negotiating settlements or arguing in court, his experience has secured substantial compensation that helps families rebuild.




What You Can Expect


Personal Attention


Your case receives the focus it deserves. We listen to your story, understand your needs, and build a strategy around you—not a template.

Clear Communication


 No legal jargon. No runaround. Just honest, straightforward updates at every stage.



Proven Results


Our track record demonstrates our commitment: maximum compensation, every time.



Our Personal Injury Services

Serious Injuries Need a Serious Plan

From freeway collisions near the 57/60 interchange to warehouse injuries around City of Industry, we handle cases that change lives. As a personal injury law firm in Diamond Bar, we know local roads, insurers, and courts—and we build each case for maximum leverage.

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Car Accidents


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Truck Accidents


Car colliding with a motorcycle. Driver in car, motorcyclist ejected.

Motorcycle

Accidents


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Workers'

Compensation


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Slip & Fall




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Dog Bites


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Product Liability


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Wrongful Death


Why Choose Us

Focused Advocacy, Proven Results

Choosing the right accident lawyer in Diamond Bar matters. Clients hire The Guerrero Firm for:


  • No Fee Until You Win


  • Multi-Millions in Recoveries


  • Undefeated in Auto Accident Cases


  • Personalized Attention from a tight-knit team


  • Graduate of the Trial Lawyers College


We blend aggressive litigation with approachable counsel—clear communication, prompt updates, and strategic action from day one.

Serving Diamond Bar & Beyond

Local Counsel for the San Gabriel Valley

With offices in Diamond Bar (Valley Vista Dr.) and Pomona (North Gary Ave.), we serve clients within the Southern California area.  We are local to Diamond Bar, Pomona, West Covina, La Puente, Walnut, Rowland Heights,  Rancho Cucamonga, and Orange County. We understand the crash patterns on the Grand Avenue SR57/CA60 bottleneck, and neighborhood corridors where serious injuries occur. If you prefer to meet in person or virtually, we make it easy.

Client Testimonials

Real Experiences, Real Outcomes

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Free Consultation & Contact

Ready to Fight Back?

If you've been injured in an accident, you don't have to face this alone. Contact Rendell M. Guerrero and THE GUERRERO FIRM today.

Your case isn't just another file to us—it's our cause, our purpose.