Which title best describes someone who provides private investigations?

The title that best describes someone who provides private investigations is "Private Investigator." This designation directly references the professional role dedicated to conducting investigations on behalf of private clients or organizations. Private investigators typically engage in activities such as gathering information, conducting surveillance, and performing background checks to support legal cases, personal inquiries, or other matters requiring detailed investigation.

The term "Private Guard" typically refers to individuals employed in security roles, focusing more on physical security and monitoring premises rather than conducting investigations. "Security Officer" also suggests responsibility for maintaining safety and overseeing security at specific locations, similar to private guards, but does not imply investigative duties. Meanwhile, a "Security Consultant" often provides advice on security measures, risk assessments, and strategies for safety without necessarily engaging in investigative work themselves. Therefore, "Private Investigator" is the most accurate and specific title for someone who conducts private investigations.