Maine Private Investigators and Investigation Agencies

private detective taking photo

Following are private investigators and investigation agencies in the state of Maine. Before hiring a detective, contact the appropriate state licensing authority to confirm current licenseinformation. To verify a license for the state of Maine, please contact:

State Police Licensing Division
State House Station  #164
Augusta, ME 04333
(207) 624-8775
Maine State Law on Private Investigators

See also: Maine Licensed Private Investigators Association

Hire a Private Investigator in Maine

The following list of private eyes is in alphabetical order and is by no means a ranking. We encourage you to evaluate each P.I.’s services and select the most appropriate provider based on your individual needs.  Take the time to review the website (if available) and call several different agencies to ask questions and get price quotes. To learn more about hiring a professional PI firm near you, and get more details on the costs involved, read our article Tips for hiring a P.I.

Calderbank Investigations

Owner – Douglas Calderbank, LPI
PO Box 10928, Portland, ME 04104
Telephone – 207-773-8715
FAX# – 207-221-1019
[email protected]

Maine Private Investigators / New Hampshire Private Investigator – Full service agency operating statewide with nationwide affiliates. Specialized in discreet investigations & surveillance for insurance companies, law firms, corporations and individuals. Other investigations include criminal, civil, pre-employment screening, locating witnesses/missing persons, process server, spousal infidelity, commercial/retail internal theft, personal and corporate background/asset investigations.

  • Maine License # 00/069
  • New Hampshire License # 10120
  • Bonded & Insured Member: NCISS, NAIS, NAPPS & MLPIA

“Continuing to Exceed Expectations”

C.L. O’Brien, Jr. & Associates

Owner – Clifford O’Brien, Jr./ Owner

PO Box 112 Bangor, Maine 04402-0112

Telephone – 207-942-5400

[email protected]

We are a licensed and experienced full service investigative firm. Experienced since 1985 we have been providing a wide array of investigations to insurance companies, businesses, attorneys and the general public. Our experience ensures that all investigations will be conducted promptly, professionally, ethically and confidentially. Visit our website for additional information. Member of the Maine Licensed Private Investigators Association, National Association of Investigative Specialists.

Cunningham Investigations

Owner – Dana Cunningham /Owner

P.O. Box 1693, Portland, Maine 04104

Telephone – (207) 775-5656
FAX – (207) 878-1122

[email protected]

“Specializing in civil cases involving workers comp, auto liability, medical malpractice, corporate investigations, divorce cases, and spousal surveillance”.

Magnus P.I. Investigations

Owner – Bertram A. Magnus

45 Pleasant Street, Houlton, Maine 04730

Telephone – 207-532-2494

[email protected]

Marine accidents and personnel investigations, Customs related, Intellectual Property Rights, Cargo and warehouse security. Surveillance for all purposes.

Maine Private Investigation

Owner – Roland Tilton LPI

PO Box 324, South China, Maine 04358

Telephone – 207-446-8980

[email protected]

Retired Maine State Game Warden. — MPI specializes in surveillance assignments related to insurance fraud, worker’s comp, spousal infidelity and covert investigations. During the last five years, working as a private investigator, I have investigated over 300 workers’ compensation assignments with an impressive record for documenting fraud. Patience and a stealth, “on foot” approach, while working cases, is a trademark of my firm and has contributed significantly to it’s success.

Maine PI Service

Owner – Mark Cayer

PO Box 556, Lewiston, Maine, 04243

Telephone – 207-754-6566

[email protected]

Maine PI Service is the premier private investigation firm with in the State of Maine. Some areas of expertise are Civil and Criminal Investigations, PROCESS SERVE, Skip Trace, Witness locates and interviews, Undercover Corporate Services. When You Want The Truth.

Surette Consulting & Investigations

Owner – Kevin J Surette, CPP

PO Box 116 Litchfield, Maine 04350

Telephone – 207-268-3419

FAX – 207-268-3420

[email protected]

Full Service Security Consultancy and Private Investigation firm.  Fully licensed, bonded and insured with Liability, Errors & Omissions Insurance. Maine License 0000829, Massachusetts license P-254, New Hampshire license 10430


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