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North American Investigations We are a licensed and bonded private investigator firm that has been conducting professional investigations and surveillance worldwide for over 45 years. We have the private detectives, resources, and knowledge you need for any one of our personalized services. NAI has set the standard in the industry with our proven methods and results. Our private investigators have the credentials and expertise needed, having solved thousands of cases for our clients. We will gather the evidence needed to solve your case.
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We are a full-service, licensed and bonded New York private investigation agency that has been conducting professional investigations and surveillance worldwide. Our New York private investigators and private detectives have worked on numerous cases featured in some of the most respected news media.
NAI has provided thousands of clients with a wide variety of solutions, which means that when you hire us, you're going to benefit from a team with the experience, knowledge, and skills best suited for your unique situation. Our expertly trained staff is comprised of former federal agents, police detectives, and seasoned private detective veterans.
One of the best reasons to hire a private investigator is for his or her experience and skill in modern surveillance. Surveillance refers to a close observation of a person or group to monitor their activities to gather evidence and meet the objectives of the case. Surveillance is difficult and takes years of practical application in order to be effective.
Our infidelity division consists of licensed private investigators who are experts in investigating cheating partners and who know the exact steps to take in order to uncover the truth for our clients. Ultimately, we are here to find the evidence you need and deserve to know about your relationship.
Reviews (10)
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Kathleen Meehan
May 11, 2022
Darrin was quick to respond & get his team on the job. He didn't waste any time reporting back & I was very happy with the results. Thank you Darrin & Team!
Andres Maldonado
May 10, 2022
Excellent service! They were able to help me last minute when I had an emergency and needed a background for a visa application. They went above and beyond and got me everything I needed. This is one place that cares about their work and helping people. Highly recommend
AnnMarie Giarrizzo
Feb 11, 2022
Darrin and his team of investigators are professional, efficent and amazing. Darrin handled my case from beginning to end and kept me updated every step of the way. He was knowledgeable and sympathetic to my needs and concerns. He was discreet and able to find the evidence I needed within one day of starting the investigation. He went above and beyond for a reasonable fee.

His customer service was impeccable. Darrin was personable and made me feel comfortable while guiding me through the emotional reality of what was going on in my life. I would highly recommend Darrin Giglio and his team for any kind of work in this field. I will use Darrin and his team again if I need any further investigative work. A++++++ FOR A JOB WELL DONE. Thank you Darrin.
Katherine Cornacchia
Jan 13, 2022
Darrin and his team are simply amazing. People need these types of services for a variety of reasons and Darrin understands the assignment and how to help immediately. I saw some reviews say it's pricey-it's not cheap but considering what you're probably looking for if you're here reading this review, Darrin is worth every single dollar! From start to finish the experience is 10/10 worth it and Darrin makes you feel at ease immediately so you know your job is in the right hands!

Professional and timely and HUMAN! Darrin helps you deal with the emotional reality of whatever your reason is for hiring him! Obviously this is a paid for service but Darrin's personality and professionalism are a huge comfort in situations like these and I absolutely can't recommend enough.
Anonymous Anonymous
Jun 07, 2020
We were in urgent need of an investigator to conduct a background check on a new employee. When we called North American Investigations and spoke to Darrin, we quickly became impressed with his professional capabilities and caring nature. After we engaged him, he was able to efficiently complete thorough research and deliver a report that summarized his conclusions. Darrin was patient answering all of our follow-up questions. We would certainly work with Darrin again.
Jackbee B.
Apr 19, 2020
North American Investigations was able to accomplish in one week what I could not accomplish using paid online search engines. I have been searching for this information for the past 15 years. It is remarkable how professional, diligent, and committed NAI is and I would highly recommend them for any investigative needs. Sincerest thanks to Darrin and his team for the excellent work.
Julie
Jan 05, 2020
My siblings and I hired Darrin, the chief investigator for North American Investigations, to gather information about suspected elder fraud impacting our family. He was responsive to our needs, gathering the information and background materials and presenting the report that we needed in order to take action. But more importantly, Darrin was sensitive to the emotional stress of the situation.

He was always available to us by phone or email, including on weekends, when he coached us through what to say and not say to our parents and to the suspected perpetrator. This helped us feel safe, above anything else. I really appreciate the work he did and the approach he took with us as clients, and recommend him highly.
D. H.
Oct 23, 2019
Was hired on 9/*/2019 to run a quick report/background check on an individual that had burglarized me. The contract i signed called for only an hour of work for $750. I provided the investigator with the person's cell phone number. We discussed a quick turn around so that we can assess if we can pursue recovery of the stolen items. Time was of issue since the thief would be able to very quickly sell the items that were stolen ( two watches).

It has been over a week to do this one hour of work, without getting any information. I contacted Darrin and expressed my dissatisfaction that i had not been given any information and at this point it would be extremely unlikely that the watches remained in the thief's possession. I requested a refund and he rejected the idea profusely saying he is working on it and under no circumstances will he refund the money. Extremely unreliable and unprofessional stay away
Lyubov Kleyner
Nov 08, 2018
I called NAI because I needed help with a child custody case. I needed them to be as discreet as possible. I can't convey to you how professional, efficient, and amazing this agency was. Darrin Giglio handled my case. He kept me updated, and was always availed to answer any questions. He was truly amazing, sympathetic, and professional. Darrin and his team have gone above and beyond to obtain the proof I need. I would recommend this agency for any kind of work in this field or any other field they handle. Thank you for the great work you do.
Julie A.
Jun 19, 2013
I had the opportunity to work with North American Investigations during a very difficult time in my life. Mr. Giglio was professional and upfront every step of the way. Investigations can be really stressful when there are people involved that you thought you knew. Luckily I was referred to North American Investigations by somebody that I know and trust. They are highly recommended and I would suggest them to anybody that needs accurate results and outstanding professionalism throughout their investigation.