Mission Advisory Group provides an array of legal, investigative, and protective services for businesses and individuals alike throughout New England.

Why Use Mission Advisory Group

Mission Advisory Group combines the expertise and resources of skilled private investigators with the legal acuity of experienced investigative attorneys to offer a complete approach to fact-finding, evidence gathering, legal analysis, and risk mitigation.

We offer comprehensive practical and legal solutions, whether you are seeking strategic advice to proactively avoid potential problems, unexpectedly facing a crisis, or simply need information to make fully-informed personal, legal, or financial decisions.

Legal, investigative and protective services, Massachusetts

Our Services


Legal Services, Protective and Investigative Service, Mass.

Legal Services

  • Conducting Internal Investigations

  • Conducting Independent Investigations

  • Criminal and Civil Litigation Strategy

  • Criminal Defense

  • Liaise with Government Agencies and Law Enforcement on behalf of Clients

  • Representation of Businesses/Individuals under Government Investigation

  • Risk Assessment and Mitigation

Investigative Services

  • Asset/Property Searches

  • Background Checks

  • Cold Case Review

  • Criminal and Civil Litigation Support

  • Data Analysis

  • Death Investigations

  • Digital Forensic Analysis

  • Missing Persons

  • Polygraph Examinations

  • Surveillance

  • Tracking Device Detection and Counter-Surveillance Measures

  • Witness Interviews

Protective Services

  • Executive Protection

  • Physical Security Site Analysis

  • Cyber Security Threat Management

About Us


Gretchen Lundgren, Attorney, Litigator, Massachusetts

Gretchen Lundgren, Founder/CEO

Gretchen Lundgren is a highly skilled litigator and investigative attorney with over 25 years of experience.  With a background in both civil and criminal law, she understands the importance of identifying and investigating threats to clients’ operational safety and integrity, providing sound legal analysis, and developing effective strategies to mitigate risk. 

Stephen C. McManus, Lead Private Investigator

Stephen C. McManus is a retired Boston Police Detective with over 36 years of law enforcement experience.  Stephen received his Bachelor’s Degree in Criminal Justice from Curry College, and a Master’s Degree from Western New England College.  He received numerous awards and commendations for bravery and excellence during his tenure as a law enforcement officer.

Our Investigators

Mission Advisory Group's licensed private investigators have a broad array of skills to meet your needs. 

Contact Us


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