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How to Become a Private Investigator in Maine

To Become a Private Investigator in Maine is simple and easy. All you need to do is apply for an "Investigative Assistant's License."

  • An Investigative Assistant's License will allow you to work as a Private Investigator for a Maine PI agency.

You don't even need to take a Private Investigator course or official state Private Investigator training to work as a Private Detective in ME.


Maine PI Employer

To work as an Investigative Assistant Private Investigator in Maine, you need to be hired by a local Private Investigator agency. Getting hired as a PI in Maine requires experience. If you do not have investigative experience, you should take a PI course that focuses on practical skills: Intro to a Career as a PI 100.

Full Maine PI License

The process for obtaining a full Maine Private Investigator's license is similar to most other places: you need to meet basic Private Investigator requirements such as age, language proficiency, and other usual PI requirements of this nature. Furthermore, to become a Private Investigator in Maine, you need to take a government approved Maine PI licensing course or have an accepted education degree.

The Special Investigations Unit: PI Licensing

In Maine, the government body that controls licensed Maine Private Investigators is The Maine State Police, under the department of The Special Investigations Unit. So, it is the SIU that will have a list of approved Maine PI licensing courses/ education. After completing the course/ education, you will need to pass a Maine government PI test. Once you submit the proof of your ability to meet the requirements and completion of the licensing course/ test to the state police, you will get your Maine PI license. Most jurisdictions will have a PI beginner’s license, Main does not. However, the Investigative Assistant's License can be viewed as a PI beginner's license. After getting this license, your struggle will begin.

Maine Beginner Private Investigator License Requirements

(Investigative Assistant)

  1. You need to be 18yo or older.

  2. You need to be an American citizen or legally allowed to work in Maine.

  3. You cannot have a history of mental illness.

  4. You must have a clean criminal record.

  5. You will need to be a registered employee under a Maine PI agency. When applying for a PI job, the PI agency will complete an employee registration document to send to the Maine SIU.

  6. To get hired in Maine you need PI experience. If you don't have experience, you should take a PI SKILLS COURSE.

Private Detective Aptitude Test

Maine Private Investigator Salary

Maine Private Investigator License Application



Maine Beginner PI License

Your Private Investigator beginner’s license in Maine is the Investigative Assistant's License. It will allow you to work for a Maine PI agency, but you will not be able to work for yourself (your own PI company). This PI license means you must work under the supervision of a fully licensed Maine PI agency. However, the term “under supervision” will be in namesake only. You will not be supervised or guided by an experienced Maine Private Investigator. In fact, PI agencies are not economically structured to have mentor/ student surveillance teams. Furthermore, a Maine licensing course will give you some transferable knowledge but it will not set you up to become a successful Private Investigator. An education degree will give you little to no help working as a PI. New Private Investigators still need to know how to be successful working operations. This is why practical Private Investigator education and training specifically for Private Investigators is necessary.

This lack of guidance is why so many new Maine Private Investigators burn out and quit and why many experienced Maine Private Investigators are jaded. On top of this, PI clients with small budgets typically get the new unqualified Private Investigators, nobody wins in this situation. It is also not fair to small PI clients to use their files to haphazardly train new Private Investigators.

Maine Private Investigator

So, the time comes for you to work investigations in Maine with no Private Investigator experience or education. The Maine licensing course you took focused on legal matters with no real practical Private Investigator training or topics. Your degree will be of no help. You will always be told by employers that “soon you will get some PI training,” which never happens. It took me over five years to figure out the industry and get good at a few specialized fields. During that time, I struggled and probably lost several hundred thousand dollars due to losing work opportunities from a lack of skill and education. What is sad is that this is a common story in the industry.

Maine Private Detective

If you make it through this meat grinder and get a Maine Private Investigator license, you be qualified to work for yourself with your own PI agency. Hopefully, when you are hiring new Private Investigators, you will appreciate the importance of proper PI education.

Maine Private Investigator License Requirements

(Professional Investigator)

  1. You must be 21yo or older.

  2. You must be an American citizen.

  3. You must have a high school diploma.

  4. You must have a clean criminal and personal record.

  5. After submitting your PI application, you will be contacted and scheduled to take the Maine PI test.


  • Maine approved PI education.


  • 1200hrs of experience as an Investigative Assistant


  • Three years of investigative experience working for a government agency.


  • A combination of experience and education.

Thinking of Becoming a Maine Private Investigator?

“ICPI Level 100 online Private Investigator Training” is the ultimate blueprint to start your exciting and rewarding career as a real Maine Private Investigator.

ICPI will help you start successfully in this amazing new career, even if you know nothing about investigations.

Our team has vetted out the best training and investigative methods so that you can jump-start your journey towards having the meaningful career you’ve always wanted, immediately.

This training system will provide you, a successful detective, with all the templates that you need to succeed. A clear path on becoming a PI, understanding the PI business, becoming a successful PI, and thinking like a detective- all the tools you need to make six figures being an investigative Operative.

To date, this online training system consists of over 100 informational slides, videos, exercises and quizzes that provide a step-by-step path on how to achieve your dream job as a Private Investigator.

ICPI Level 100 takes about two weeks to complete with over 30 hours of high-quality training content that will make you a Private Investigator well on your way to becoming an expert in this fascinating career.


Get a certificate that "actually" matters. When you get certified by Novel Data in the 100 Level course, Maine Private Invest