Do you need help
protecting your family
or business?

We provide a wide range of security services to ensure that you
and your loved ones are safe and protected. You can trust us to
handle any situation with professionalism and discretion.

We understand that investing in security services can take time and effort. That’s why we’ve created
this guide – to help you choose the right services for your needs.

Download our guide to get started on finding the right security
services for your needs.



Merrill's team of experienced professionals are intimatley familiar with the geography, resources, and
culture where they are operating. With a coverage area expanding in 35 states and Canada we are
ready and able to deploy at a moments notice.

learn more

Investigation company Maine


  • Team Member 1
  • Team Member 8
  • Team Member 22
  • Team Member 31
  • Team Member 37
  • Team Member 41
  • Team Member 46
  • Team Member 50
  • 24 years in Law Enforcement
  • 16 years Chief of Police
  • Maine DEA – Commander northern region State of Maine
  • Supervisor - Bureau of Drug Enforcement
  • Lieutenant – Drug Investigation
  • Detective Sergeant – Criminal investigation
  • Patrolman – Traffic Enforcement and Criminal investigation
  • 27 years law enforcement
  • 10 years - Trooper
  • 12 years - Rural Patrol Sergeant
  • 2 years – Sergeant in Internal Affairs
  • High Risk Security Supervisor/Manager – 10 years
  • Advanced Executive / Dignitary Protection – Blackwater Worldwide
  • Advanced Interview / Interrogation – John E. Reid and Associates
  • Active Shooter Dynamics – ASIS
  • Threat / Risk Assessment & Management – Texas A&M / FEMA
  • Crime Scene Preservation – Compliance By Design
  • 9 years - Air Interdiction Officer / Criminal Investigator - U.S. Customs Service, Office of Aviation Operations
  • 5 years - Special Agent - U.S. Customs Service: Financial Investigations Group and Special Operations Group (drug smuggling)
  • 13.5 years - Special Agent - Dept. of Homeland Security, Homeland Security Investigations: Multi Investigative Categorizes and Computer Forensics
  • 30 years in Law Enforcement.
  • 1 year - Airport Police Officer
  • 5 years - Patrol Officer
  • 17 years - Detective
  • 7 years - Assistant to Chief, Manager of Sexual Assault Programs, Sexual Assault Investigator
  • 8 years - Trooper – Traffic Enforcement and Criminal Investigations
  • 16 years - Detective Grade Task Force and Negotiation Team
  • 4 years - Sergeant – Criminal Division Supervisor
  • 9 years - Patrol Officer - Traffic Enforcement,
  • 1 year - Sergeant - Patrol Supervisor
  • 1 year - CID / Under Cover Unit (Street Level Drugs, Prostitution, Special Operations)
  • 4 years - CID / Detective (Child Abuse, Elderly Exploitation, Property Crimes, Robbery, Homicide)
  • 3 years - Sergeant / Internal Affairs, Criminal Investigations, Complaint resolution & mediation, other personnel issues
  • 3 years - Captain - Law Enforcement Division Commander
  • 10 Years in US Army as Military Policeman. Licensed Professional Investigator - 5 years
  • 3 years - Staff Sergeant – Squad Leader, Tactical Convoy Commander, Personnel Security Detail
  • 2 years - Supervisor, Investigator, Traffic Accident Investigator, Physical/Protective Security Officer


Founded in 1986 by Retired Maine Game Warden Major Charles A, Merrill, Merrill's Investigation and Security has spent the past 37-years building our reputation as the best, most reliable, and easiest to work with investigation and security firm in the industry.

In 1999 the company added security and executive protection to its suite of services.

In 2004, after a ten-year affiliation with Merrill’s and 21 years in law enforcement, Michael C. Harrington Sr. acquired the company.

read more about us


I"m a paragraph. Click here to add your own text and edit me. It's easy. Just click "Edit this text" below and you can start adding your own content and make changes to the font.

NOTE: This sample text won't appear for your users

our latest blog posts

Our new website provides our existing and prospective clients a simple yet interactive view of our work and the services we offer. Stay tuned to our blog for new ideas!

learn more