Browse the Top Private Investigators Serving Rancho Cucamonga, CA

Silent Warrior Investigations provides professional private investigation and lie detection services in Orange, California. With over 30 years of law enforcement experience, we offer criminal investigations, civil litigation support, covert surveillance, executive protection, and polygraph exams. Our team delivers reliable, confidential results to attorneys, businesses, and individuals across Southern California and nationwide.

Starside Security & Investigation provides comprehensive security, detention transport, and investigative services to government agencies, corporations, and high-profile clients nationwide. With over 25 years of experience, we specialize in physical security, executive protection, and forensic investigations, combining veteran expertise with advanced technology. Our 24/7 operations and nationwide presence ensure reliable, customized solutions for diverse security needs.

RCS Investigations provides professional investigative services including police/fire background checks, surveillance, and internal affairs investigations. Our team of retired law enforcement professionals ensures compliance with state and federal regulations while delivering detailed, confidential reports. We serve public agencies and private clients across Southern California with a focus on accuracy and ethical standards.

Encinas Investigations-PI delivers certified firearms training, tactical courses, and security officer programs in Anaheim Hills, CA. With over 40 years of experience, we offer state-approved CCW certification, patrol rifle instruction, and bilingual training in English and Spanish. Our accredited curriculum prepares students for careers in private security and public safety through hands-on instruction from active industry professionals.