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Senior Investigator Jobs in Riverside, CA (NOW HIRING)

Mid-Senior Geologist

Irvine, CA · On-site

$90K - $140K/yr

Mid-Senior Geologist (PG/ CEG/ CHG) We currently seek a Mid to Senior Level Geologist ... investigations and subsequent investigations necessary for lateral and/or vertical delineation

Senior Cost Accountant

Irvine, CA · Remote

$40 - $50/hr

Senior Cost Accountant (Consultant) Location: Irvine, CA (Remote) Assignment Type: Temporary ... Analyze financial and operational data to identify variances and investigate discrepancies.

The Senior Environmental Consultant for the Environmental Engineering Practice will support the execution of environmental site assessment projects including site assessment, subsurface investigation ...

Senior Accountant

Ontario, CA · On-site

$75K - $94K/yr

This Senior Accountant will step into a highly visible, hands-on role with ownership over some of ... Ability to investigate accounting discrepancies, determine root causes, and implement corrections ...

Senior Accountant

Ontario, CA · On-site

$75K - $94K/yr

This Senior Accountant will step into a highly visible, hands-on role with ownership over some of ... Ability to investigate accounting discrepancies, determine root causes, and implement corrections ...

Sr. Auditor

Irvine, CA · On-site

$86K - $106K/yr

The Senior Auditor assists in writing audit reports, which are finalized at the conclusion of ... Conducts focused investigative audit work with the Audit Manager and/or Audit Director's review on ...

Your Opportunity The Senior Paleontologist will work as part of a dynamic team that is based in ... investigators. Stantec supports a wide range of paleontology projects, from multi-state ...

Showing results 41-60

Senior Investigator information

See Riverside, CA salary details

$29.7K

$79.9K

$143.4K

How much do senior investigator jobs pay per year?

As of Sep 2, 2026, the average yearly pay for senior investigator in Riverside, CA is $79,922.00, according to ZipRecruiter salary data. Most workers in this role earn between $52,200.00 and $102,800.00 per year, depending on experience, location, and employer.

What is a senior investigator?

A Senior Investigator is an experienced professional responsible for leading and managing complex investigations, often within law enforcement, corporate, or regulatory settings. Their duties typically include gathering and analyzing evidence, interviewing witnesses, compiling reports, and providing expert testimony. Senior Investigators often supervise junior staff, ensure compliance with legal procedures, and may specialize in areas such as fraud, criminal, or internal investigations. Their extensive experience enables them to handle high-profile or sensitive cases. This role requires strong analytical, communication, and leadership skills.

What does a senior investigator do?

A senior investigator manages investigations for various crimes including fraud, corruption, and organized crime. As a senior investigator, you work for the district attorney, and your primary responsibilities revolve around collaborating with law enforcement to take on these crime issues. You may have additional duties, such as interviewing witnesses and filing evidence and reports as required by the district attorney. Excellent communication skills are imperative as you’ll encounter a variety of different people on the job. While qualifications vary by state, you likely need an associate’s degree, and at least a year of experience as an investigator with the D.A. Your employer will conduct a criminal background check.

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

To thrive as a Senior Investigator, you need expertise in investigative techniques, analytical thinking, and a background in law enforcement or a related field, often supported by a relevant degree or certifications. Familiarity with case management systems, digital forensics tools, and legal research databases is typically required. Exceptional attention to detail, strong communication, and the ability to maintain confidentiality set top performers apart. These skills ensure thorough investigations, accurate reporting, and effective resolution of complex cases.

What are some common challenges senior investigators face when managing complex cases, and how can they effectively address them?

Senior Investigators frequently encounter challenges such as coordinating multidisciplinary teams, handling sensitive information, and navigating regulatory or legal constraints. Successfully addressing these issues requires strong leadership, clear communication, and meticulous documentation. Senior Investigators often rely on advanced investigative techniques and foster collaboration with legal, compliance, and technical experts to ensure thorough, compliant case resolution. Staying current with industry best practices and maintaining professional integrity are essential for overcoming these obstacles.

What is the difference between Senior Investigator vs Investigator?

AspectSenior InvestigatorInvestigator
Required CredentialsTypically requires a bachelor's degree, relevant certifications, and several years of experienceUsually requires a bachelor's degree, entry-level certifications, and less experience
Work EnvironmentLeads investigations, supervises junior staff, and handles complex casesConducts investigations under supervision, handles routine cases
Employer & Industry UsageUsed in law enforcement, insurance, and corporate investigationsCommon in law enforcement, private investigation firms, and regulatory agencies

The main difference between a Senior Investigator and an Investigator lies in experience, responsibilities, and leadership roles. Senior Investigators typically have more experience, handle complex cases, and supervise others, whereas Investigators focus on routine investigations under supervision. Both roles are essential in investigative fields, but the senior position involves greater expertise and leadership.

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 are popular job titles related to Senior Investigator jobs in Riverside, CA?

For Senior Investigator jobs in Riverside, CA, the most frequently searched job titles are:

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

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

Infographic showing various Senior Investigator job openings in Riverside, CA as of August 2026, with employment types broken down into 87% Full Time, 12% Part Time, and 1% Contract. Highlights an 93% Physical, 1% Hybrid, and 6% Remote job distribution, with an average salary of $79,922 per year, or $38.4 per hour.

Sr Project Manager - Environmental Solutions

Partner Engineering and Science

Irvine, CA • On-site

$120K - $160K/yr

Full-time

Re-posted 21 days ago


Job description

ABOUT US

At PARTNER, success starts with the right mindset: connection, compassion, and curiosity. Whether consulting with clients or collaborating with colleagues, these principles guide how we work. We deliver engineering, environmental, and energy consulting, plus design services across the Americas, Europe, and beyond. As a leader in Commercial Real Estate (CRE), we’re 1,600+ professionals strong in 40+ offices. Our mission is simple: create the best home for talented professionals. If you value delivering exceptional experiences through problem-solving, coordination, and a mindset of care for clients and colleagues, you’ll feel right at home. That approach has earned us recognition on ENR’s Top 500 Design Firms, Inc. 5000’s Fastest-Growing Companies, and Zweig’s Best Firms to Work For. Here, your ideas matter, your impact is real, and your work helps shape the future. Check out this role and join our team of talented professionals.

Learn more about Partner at www.partneresi.com.

SUMMARY

Partner has an exciting opportunity for a talented full-time Environmental Senior Project Manager to support our ever-growing Environmental Solutions Practice on projects throughout the Southwest United States out of Partner’s Irvine or Torrance, California, offices.  The group focuses on site characterization, risk assessments, design and implementation of remedial actions, regulatory interaction, and reporting.  Interested individuals will have the opportunity to collaborate with our current team of experienced professionals to perform Senior Project Manager responsibilities related to environmental investigation and remediation across a portfolio of diverse and interesting project sites.

ESSENTIAL DUTIES & TASKS 

  • With limited guidance, support Senior team members to manage multiple projects concurrently to meet technical, regulatory, quality, scheduling, and budgetary requirements
  • Assist with the planning and implementation of site investigations and remedial activities at various sites
  • Prepare and review regulatory and technical reports
  • Coordinate the efforts of Partner team members to complete and deliver projects according to schedule/budget effectively
  • Oversee quality control throughout the project’s life cycle
  • Delegate tasks and responsibilities to appropriate team members, as well as assist in the mentorship and training of junior staff
  • As needed, oversee and field-implement detailed remedial action projects (e.g., remedial system design/installation, UST removals, soil characterization and disposal, redevelopment, and logistically challenging Sites)
  • Plan, schedule, and track project timelines and milestones to ensure project progress is on schedule and in accordance with regulatory timeframes while providing timely progress reports, recommendations, and maintaining communication with the appropriate individuals
  • Collaborate with Senior Project Management to provide sound recommendations and solutions to Relationship Managers and Clients
  • Manage Client and regulatory agency follow-up, questions, and concerns
  • Manage subcontractor and client invoicing

KNOWLEDGE, SKILLS, AND ABILITIES

  • Excellent communication skills
  • Experience in investigating environmentally impacted sites
  • Ability to work on multiple projects concurrently and complete a wide range of project tasks, including client management, proposal preparation/cost estimating, work plan preparation, report writing, field work, and subcontractor coordination
  • Proven ability to successfully deliver a quality product on time
  • Exceptional technical report writing and reviewing skills
  • Ability to cultivate strong relationships within a team and the Client group
  • Understanding of the concepts of environmental consulting as it pertains to risk management and due diligence

QUALIFICATIONS

  • Must have 10-15 years of relevant work experience on site remediation projects with knowledge associated with California Environmental Regulations 
  • Project experience in one or more of the following states: Arizona or Nevada is a plus.
  • Bachelor’s degree from an accredited university in geology, environmental science, engineering, or a similar discipline
  • Post-degree in an earth science or engineering discipline is a plus
  • Current 40-hour HAZWOPER trained

PHYSICAL REQUIREMENTS

  • Must be able to pass a baseline physical exam and respirator fit test
  • Must be able to read, write, speak, and comprehend English and communicate clearly in person and over the telephone
  • Visual acuity adequate to perform job duties, including reading information from printed sources and the computer screen
  • Requires frequent bending, reaching, standing, walking, sitting, pushing, and pulling exerted regularly throughout the work shift
  • Possible limited travel to other states, generally Arizona and Nevada

Compensation

Salary Range: $120,000-160,000

The pay scale for this role considers a wide range of factors when making compensation decisions, including, but not limited to, skill sets, experience and training, licensure and certifications, and other business and organizational needs. Please note that the disclosed pay scale estimate has not been adjusted for the applicable geographic location where the position may be filled.  You may also be eligible to participate in a discretionary incentive bonus program, which is dependent on various factors, including, but not limited to, individual and organizational performance. 

We will consider qualified applicants who have criminal histories in a manner consistent with the law.

Equal Employment Opportunity

It is Partner Engineering and Science, Inc’s (The Company) policy to provide equal employment opportunity for all applicants and employees. The Company does not unlawfully discriminate on the basis of race, color, religion, sex (including pregnancy, childbirth, or related medical conditions), gender identity, gender expression, national origin, ancestry, citizenship, age, physical or mental disability, legally protected medical condition or information including genetic information, family care status, military caregiver status, veteran status, marital status, or any other basis protected by local, state, or federal laws.

California Consumer Privacy Act

We collect personal information from you in connection with your application for employment with Partner Engineering and Science, Inc.  For details on what personal information we collect and the purposes for which we collect it, please visit:

https://www.partneresi.com/about/careers/california-consumer-privacy-act