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Investigator Jobs in Riverside, CA (NOW HIRING)

Complaint Investigator

Irvine, CA ยท On-site

$24 - $38/hr

The Complaint Investigator is responsible for conducting investigations on product complaints for company manufactured and distributed products as required by applicable regulations, standards, and ...

Investigator

Riverside, CA ยท On-site

$144.23/hr

Job Summary Our client is seeking an experienced Investigator to lead and oversee clinical trials, ensuring compliance with protocol requirements, regulatory standards, and ethical guidelines. The ...

Surveillance Investigator

Santa Ana, CA ยท On-site

$20 - $26/hr

Surveillance Investigator Job Location : Santa Ana, California Job Type: Full-Time, Billable Hours, Non-exempt Eager to start your career in a growing industry? Get paid to learn the ropes of fraud ...

Quality Investigator Company: B. Braun US Pharmaceutical Manufacturing LLC Job Posting Location: Irvine, California, United States Functional Area: Quality Working Model: Onsite Days of Work: Friday ...

Quality Investigator

Irvine, CA ยท On-site

$71K - $89K/yr

Quality Investigator Company: B. Braun US Pharmaceutical Manufacturing LLC Job Posting Location: Irvine, California, United States Functional Area: Quality Working Model: Onsite Days of Work: Friday ...

Medical Canvass Investigator

Irvine, CA ยท Remote

$17 - $22/hr

Research Investigator Job Location : Fully Remote - equipment provided Job Type: Full-Time, Billable Hours, Non-exempt Compensation : $17 - $22/hour, paid weekly Reports To : Regional Manager ...

Showing results 21-40

Investigator information

See Riverside, CA salary details

$33.4K

$78.6K

$136.7K

How much do investigator jobs pay per year?

As of Aug 21, 2026, the average yearly pay for investigator in Riverside, CA is $78,584.00, according to ZipRecruiter salary data. Most workers in this role earn between $54,800.00 and $102,800.00 per year, depending on experience, location, and employer.

What does an investigator do?

An Investigator is responsible for gathering facts, collecting evidence, and conducting interviews to solve cases or uncover information. They may work in law enforcement, private investigation, corporate security, or other specialized fields. Their duties often include surveillance, report writing, and presenting findings to clients or authorities. Investigators must be detail-oriented, analytical, and maintain confidentiality throughout their work.

What are the key skills and qualifications needed to thrive as an investigator, and why are they important?

To thrive as an Investigator, you need strong analytical abilities, attention to detail, and a relevant degree or law enforcement background. Familiarity with investigative tools, case management software, and sometimes certifications like Certified Fraud Examiner (CFE) are typically required. Outstanding communication, critical thinking, and discretion are essential soft skills for gathering information and managing sensitive situations. These skills and qualifications are vital to effectively uncover facts, maintain integrity, and ensure successful case resolution.

How can I become a criminal investigator?

A criminal investigator is an officer of the law who investigates crimes, interviews witnesses, and helps build cases that lead to an indictment. To start a career as a criminal investigator, you need to have several qualifications, which depend largely on the organization for which you plan to work. At the federal level, organizations like the FBI require you to gain acceptance into and complete an intense, five-month training program. For this level, you need significant law enforcement experience, and most applicants hold a degree in criminal justice or a related field. If you want to become a state or local police officer, you still need to attend a police academy, but the qualifications for admission are lower. You need a high school diploma or a GED certificate. However, it can take some time to work up to the level of a criminal investigator or detective.

How do investigators typically work with other departments or external agencies during an investigation?

Investigators often collaborate extensively with other internal departments such as legal, compliance, and human resources, as well as with external agencies like law enforcement or regulatory bodies. This teamwork ensures a thorough and coordinated approach to gathering evidence, conducting interviews, and maintaining proper documentation. Clear communication and strict adherence to protocols are essential to preserve the integrity and confidentiality of the investigation. Building strong working relationships with colleagues and agency contacts can also help streamline the process and achieve effective outcomes.

What is the difference between Investigator vs Forensic Scientist?

AspectInvestigatorForensic Scientist
Required CredentialsHigh school diploma or equivalent; law enforcement training or certifications often preferredBachelor's degree in forensic science, chemistry, biology, or related field; certifications may enhance prospects
Work EnvironmentLaw enforcement agencies, crime scenes, investigationsLaboratories, crime labs, research facilities
Employer & Industry UsagePolice departments, federal agencies, private investigation firmsCrime labs, forensic laboratories, research institutions
Common Search & Comparison IntentUnderstanding investigative roles in law enforcementUnderstanding scientific analysis in forensic work

Investigators focus on gathering evidence, interviewing witnesses, and solving cases in the field, often working directly at crime scenes. Forensic scientists analyze physical evidence in labs to support investigations. Both roles are essential in criminal justice but differ in their work environment, credentials, and daily tasks.

What are some investigator jobs?

Investigator jobs include roles such as criminal investigators, private investigators, insurance investigators, and corporate investigators. These positions involve gathering evidence, conducting interviews, and analyzing information to solve cases or resolve disputes, often requiring knowledge of legal procedures and investigative tools.

What are the most commonly searched types of Investigator jobs in Riverside, CA?

The most popular types of Investigator jobs in Riverside, CA are:

What cities near Riverside, CA are hiring for Investigator jobs?

Cities near Riverside, CA with the most Investigator job openings:

Infographic showing various Investigator job openings in Riverside, CA as of August 2026, with employment types broken down into 87% Full Time, 10% Part Time, and 3% Contract. Highlights an 97% In-person, and 3% Remote job distribution, with an average salary of $78,584 per year, or $37.8 per hour.

Complaint Investigator

Nihon Kohden

Irvine, CA โ€ข On-site

$24 - $38/hr

Full-time

Re-posted 3 days ago


Job description

The Complaint Investigator is responsible for conducting investigations on product complaints for company manufactured and distributed products as required by applicable regulations, standards, and company policy. This position will interface with cross-functional groups such as customer service, technical support, field personnel, operations, and others for the identification and resolution of customer complaints and may interact directly with customers. The Complaint Investigator identifies causes of complaints, documents the findings, and escalates issues in accordance with company policy.

Essential Functions and Main Duties

  • Responsible for processing complaints while using good documentation practices (GDP).
  • Interface with Customer Service, Field team, and customers to gather additional information required for complaint initiation/investigations.
  • Interacts with customers verbally or in writing using clear, effective communication.
  • Conduct investigations and provide data to drive corrective and preventive actions and complaints based on sound engineering analysis and review.
  • Manage and assess incoming complaints and elevate potential issues/incidents to Quality Management/supervisor, including but not limited to, possible recall situations, remedial action, and field safety actions.
  • Review compliant files for completeness and follow-up with suppliers (responsible party) as applicable for investigation outcomes.
  • Work closely with Manufacturing, Operations, R&D and other departments to ensure quality products and processes are developed, deployed, and meets US and OUS requirements. This includes hardware and software validation, risk analysis/FMEA, etc.
  • Utilize systems for the identification, analysis, correction, and prevention of quality issues.
  • Conduct and maintain complete complaint files and databases for all customer complaints per US engineering activities in compliance with FDA Regulations, ISO 13485 and other national and international quality and regulatory (as applicable) requirements and company procedures standards.
  • Prepare customer notification letters for receipt of product complaint and follow-up acknowledgement letters information, as required.
  • Utilizes product and incident complaint codes to conduct data trending and analysis review.
  • Lead complaint investigation to understand root cause in support of documenting proper complaint file closure.
  • Complete all required customer complaint related documentation in an accurate, professional, and timely manner.
  • Perform queries to provide complaint data and ad hoc trend analysis on reported product problems/complaints.
  • Provide follow-up to internal and external customers needed, including customer correspondence and regulatory agency correspondence.
  • Prepare final correspondence summarizing investigation findings.
  • Create/gather, analyze, and provide feedback on complaint data for the team and management for post market surveillance activities, and participate in projects as required.
  • Assist as needed in the preparation of data for internal audits and external audits/inspections
  • Adhere to all company policies, procedures, and business ethics codes.
  • Duties may be modified or assigned at any time based on business need.

Qualifications

Education / Certification / Experience Required:

  • Bachelor's degree in science or related discipline; relevant education and experience accepted in lieu of degree
  • 1+ years relevant or similar experience

  • Level and compensation depend on location, experience, education and skills

Competencies Required:

  • Must be able to demonstrate ability to understand the medical device product and its application.
  • Preferred knowledge of FDA Medical Device Reporting and Quality System Regulation (21 CFR Part 803, 806, and 820), and ISO Standards (ISO 13485-QMS, ISO 14971-Risk Management), as they relate to complaint investigations or equivalent.
  • Proficient computer skills and knowledge of relevant business applications, Microsoft Office applications. Ability to learn other software quickly as required.
  • Must be detail oriented.
  • Decision making is required in balancing priorities amongst other ongoing tasks and being responsive to critical situations.
  • Critical thinking and strong problem-solving skills
  • Effective verbal and interpersonal skills
  • Demonstrates good judgement in selecting methods and techniques for obtaining solutions.
  • Role model for other team members.
  • Strong knowledge of the product and investigation requirements.
  • Assists other levels with building up their technical capabilities.
  • Must be able to communicate verbally and in writing, and to receive and understand verbal and written instructions in English
  • Able to work effectively both independently and in a collaborative team environment.

Compensation

The anticipated range for this position is an hourly rate of $24.00 to $38.00 Actual placement within the range is dependent on multiple factors, including but not limited to skills, education, experience and location.

Perks and Benefits

Visit our Career page to learn more about Perks & Benefits and working at Nihon Kohden America

Working Conditions

Schedule: The regular hours for this full-time position are 8:00 a.m. to 5:00 p.m., Monday - Friday, unless otherwise stated by the department manager. Holiday, weekend, and evening work hours may be required. Regular hours may vary due to the needs of the organization or department and are subject to change at any time at the Company's discretion.

Physical: Generally, may require some reaching, bending, stooping, squatting, crawling, kneeling, pushing, pulling, lifting, carrying up to 20 pounds, finger dexterity, repetitive motions, standing, walking, sitting, hearing, visual acuity, and color vision. More specific details may be provided as needed or requested.

Travel: Minimal

Access to Customer Sites: Not Required


Nihon Kohden America is committed to maintaining a professional and respectful workplace free from discrimination, harassment, and retaliation and welcomes all qualified candidates to apply. Employment decisions are based on qualifications, experience, and business needs, without regard to legally protected characteristics. This policy applies to all employment actions, including recruitment, hiring, promotion, compensation, training, and other workplace practices.

Nihon Kohden America complies with all applicable federal, state, and local laws regarding equal employment opportunity. Employees and applicants will not be subject to harassment or retaliation for asserting their legal rights. Questions or concerns regarding this policy may be directed to Human Resources at HREmployeeServices@nihonkohden.com.