Adam Quirk Private Investigator

Adam Quirk Private Investigator

Adam Quirk, MCJ & MBA, is a distinguished and accomplished criminal justice professional with nearly two decades of experience conducting private investigations for his very own company, Stealth Advise, criminal investigations for the FBI, pharmaceutical narcotics investigations for the DEA, and personnel security investigations for the U.S. Office of Personnel Management. After 15 years of unwavering dedication and service, Adam transitioned from the federal government to return to the classroom, and to pursue his own private investigations company. Stealth Advise is the result of that pursuit.

As the Principal Owner of Stealth Advise, Adam Quirk conducts multiple types of investigations, including criminal defense, missing persons, suspicious deaths, parole and probation revocations, and many other 'as needed' investigations throughout Wisconsin for attorneys, private individuals, insurance companies, and corporations. Adam has also conducted corporate international investigations originating in the United Kingdom, China, Australia and Hong Kong, as well as other international locations.

Adam's experience, education, professional certifications and community service make him and his firm an excellent choice for private investigations services throughout Wisconsin and beyond.



For nearly two decades Adam Quirk has conducted thousands of interviews and interrogations, testified in state and federal court, served as an Affiant on arrest and search warrants, directed surveillance, arrested fugitives, tracked cell phones, and supervised law enforcement personnel. During his tenure with the feds, he specialized in long term violent crime investigations, bank robberies, kidnappings, missing persons, and Top Ten Most Wanted fugitive recoveries. Adam also specialized in pharmaceutical narcotics investigations, regulatory audits, personnel background checks, and other investigations. As a private investigator, Adam Quirk continues conducting investigations, interviewing suspects and witnesses, conducting surveillance, and using other investigative techniques.

Adam Quirk is also qualified in state and federal court as a cellular phone tracking and technology expert, and he has multiple certifications in conducting interviews and interrogations from the FBI, DEA, and the Reid Institute, including a specialized certification for conducting forensic interviews of children.


Adam Quirk earned a Bachelor’s degree in Criminal Justice from the University of Wisconsin-Eau Claire and a Master’s degree in Criminal Justice (MCJ) from Boston University. In 2016, he earned a third advanced degree when he graduated with a Master of Business Administration (MBA) degree from the University of Wisconsin-Oshkosh. Additionally, Adam proudly graduated from the FBI Academy, as well as the DEA Academy-the most elite law enforcement training facilities in the world.

Adam has attended countless criminal justice related training courses and seminars throughout the world, and served as a Certified Training Instructor (CTI) for the FBI. Adam regularly attends conferences and seminars throughout the world in order to maintain contemporary knowledge regarding criminal justice matters, investigative techniques, technological advances in the criminal justice field, and relevant investigations subject matter.  Adam also recently became certified by the National Association of Professional Background Screeners (NAPBS) as an expert in understanding hiring requirements and regulations under the Fair Credit Reporting Act (FCRA).

Adam Quirk also maintains professional memberships in several organizations, including the National Association of Professional Background Screeners (NAPBS), the Academy of Criminal Justice Sciences (ACJS), the American Society of Criminology (ASC), the American Academy of Forensic Sciences (AAFS), the National Criminal Justice Association (NCJA), ASIS International, and the Association of Certified Fraud Examiners (ACFE). Adam is also licensed as a private investigator in the State of Wisconsin, and his investigation's firm is licensed and fully insured in Wisconsin as well.

Community Service

Adam also dedicates a significant amount of time giving back to his community. For example, Adam volunteers weekly for Circles of Support, an organization dedicated to assisting individuals get back on their feet after being released from prison. Adam helps these individuals find housing, transportation, clothing, and employment so they can meaningfully engage in society without re-offending. Individuals who participate in Circles of Support have recidivism rates of less than 10%, a remarkably low rate compared to most individuals who are released from incarceration. Adam also volunteers for other notable causes in Brown County, Wisconsin.


When Adam is not conducting investigations, managing Stealth Advise, attending class, or traveling the world, he enjoys blogging and writing literature reviews about criminal justice matters, international travel, and the automotive industry.

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