about simmons detective agency

Simmons Agency is one of Boston’s oldest and most respected private investigation firms since 1935

At Simmons Detective Agency, our trained staff of investigators handles a variety of cases including adultery, assets, backgrounds, child custody, criminal, domestic, fraud, heirs, litigation, missing persons, negligent hiring, surveillance.

The Simmons Agency is proud of its reputation for providing quality investigative services to Fortune 500 companies, law firms, private attorneys, universities, the entertainment industry and private individuals. The Simmons Detective Agency has been acclaimed in major publications including New England Journal, Lawyers Weekly, Business World, Playboy Magazine, Security News, the Boston Herald, Boston Globe, and The Quincy Patriot Ledger.

When you need experienced, discreet and confidential professional investigators, call Simmons Agency at 1-800-237-8230 for a comprehensive and confidential solution to your problem. If you’re ready for a complimentary 30-minute consultation, please click here to get started. 

About Robert Simmons, CEO

With over 35,000 cases solved, Robert has been dubbed the “investigator’s investigator.” Robert has been a licensed private investigator for over 60 years with broad experience as a licensed private investigator and CEO for one of the oldest detective firms in Boston. Robert has been professionally recognized for skills on long and difficult surveillance assignments with the ability to find obscure and hidden information with decades of leadership experience in the private investigation industry, including serving as president of the Massachusetts Association of Licensed Detective Agencies, and president of the Council of International Investigators.

Robert’s Specialties Include

Accident Investigations | Acquisitions | Asset Location | Backgrounds | Child Custody | Criminal Defense | Due Diligence | Environmental | Finding PRP | Executive Protection | Fraud | Heir Research | Insurance | Intellectual Property | Litigation Support | Mergers | Negligent Hiring & Retention | Proxy Fights | Surveillance Sexual Harassment | Trademark Law | White Collar Crime | Witness Location


  • Chairman, National Association of Legal Investigators Seminars
  • Director, Region One, National Association of Legal Investigators
  • Board of Directors, National Association of Legal Investigators
  • President, Council of International Investigators
  • President, Massachusetts Association of Licensed Investigators
  • Chairman, Boston Junior Chamber of Law Enforcement Committee

Speaking Engagements

  • Boston University Paralegal Studies Course
  • Route 128 CPA Practitioners Forum
  • Boston University Paralegal Studies Course
  • Boston University Research and Development Department for Missing Alumni
  • New York Health Claims Association on Unprofitable Risks
  • National Association of Legal Investigators
  • New England Claims Association
  • New England Development Research Association


  • Instructor: Boston Center for Adult Education
  • Pro Bono work for Housing Assistance Corporation
  • Pro Bono work for Cape Cod Legal Assistance Program
  • Hosted Council of International Investigators Convention
  • Consultant to prisons on the Federal Bonding Program
    “The Legalite” recommends that attorneys use Simmons Detective Agency, Inc.
  • Chaired Law Enforcement Committee of the Boston Junior Chamber of Commerce; passed bill providing the Boston Police Department with Police Cadets; organized Boston Junior Chamber of Commerce award to “Outstanding Young Policeman”
  • Board of Directors, Massachusetts Zoological Society 


  • National Association of Legal Investigators: Dedicated Service Award, Seminar Chairperson
  • Boston University Alumni Association Reunion Volunteer Appreciation
  • Boston Legal Secretaries Association Certificate of Appreciation
  • Council of International Investigators Outstanding Service Award; Appreciation Award
  • Massachusetts Association of Licensed Detective Agencies Distinguished Service Award
  • Boston Junior Chamber of Commerce Certificate of Merit
  • Kiwanis Club of Chelsea: Certificate of Appreciation
  • Rotary Kiwanis Boston Legal Secretaries Association
    Greater 128 CPA Association

Simmons Agency Services

Simmons Detective Agency has a wide variety of services to assist with all of your investigative and surveillance needs including due diligence investigations, surveillance services, corporate investigations, attorney litigation services, discrimination cases, criminal defense investigations, and more. If you would like to learn more about our services, or if you’re ready for a complimentary 30-minute consultation, please click here to get started. And – we invite you to follow our social conversations on LinkedIn.