P.O. Box 417, Sewell, NJ 08080, US

(856) 832-5062

Hire a Private Investigator-Private Detective in New Jersey & Pennsylvania


Professional References

1.  “I have used Bob on numerous occasions for a variety of assignments, including social media searches and locating witnesses and parties, all with excellent results. He has proven himself to be both thorough and prompt and my go-to for all private investigation needs.” 

Justin A. Britton, Esq. - Cooper Levenson Law Firm

2.  “I used Zimmerman Investigative Services for a difficult investigation involving two hard to find individuals.  Bob relentlessly pursued the statements I needed. The statements changed the case in our favor.  Bob’s efforts were extremely professional and also completed in a very timely manner.  I will continue to use ZIS on my difficult cases.  I highly recommend Bob to attorneys and law firms who need expedited and thorough results.”

Matthew P. Lyons, Esq. - Gebhardt & Kiefer Law Firm


3.  “We have used Bob’s services in numerous matters to include digital investigations, surveillance, and service of process.  He is always very responsive and prompt with his work product.  We will continue to use Bob’s services in the future and recommend that others in South Jersey do the same.”

M. Brian Hall, Esq. - Law Offices of Ward, Shindle & Hall

4.  “Has been great working with Bob and plan to get back in contact if I need anything.  Helpful, organized and follows through with everything.  Extremely professional and would  highly recommend to anyone needing his help!!”

Jessica Sciangola, Senior Tax Accountant  

5.  “I have been working with Zimmerman Investigative Services to do comprehensive background screenings on my new employees.  The screenings always come back quickly, which is very important in my staffing business.  I would highly recommend using Bob’s services.  They are very professional, reliable, and efficient!!”

Jackie Polillo, Owner - Professional Medical Staffing


6.  “I have used Zimmerman Investigative Services in our district primarily for residency issues.  The services provided were very helpful to our district and were done in a professional manner.  Bob is very professional and detail oriented in his work.  All investigations and reports were completed in a timely manner and were very thorough to provide the necessary information to our specific cases.  We will continue using Zimmerman Investigative Services based on the experiences we have had to date.  If you are in need of an investigator, I would recommend using Bob due to his extensive knowledge and services he can provide.”

Peter Koza, Ed. D., Superintendent - Upper Deerfield Township Schools

7.  “I contacted Zimmerman Investigative Services for a suspected infidelity case.  I was seeking peace of mind and clarity in my relationship.  Having had no experience in this matter, the entire idea made me very nervous.  But from the very beginning of our phone conversation, Bob made me feel at ease and was sensitive to my situation.

Throughout the entire process he was very thorough, efficient and maintained great communication.  I was aware of every detail while the investigation was taking place.  In the end, I found him to be very honest, straight forward and extremely professional.  I would highly recommend his services to anyone.”

Confidential Client - Cumberland County, New Jersey 

8.  “A simple ‘thank you’ is not nearly enough to express Rita’s and my sincere appreciation for your work in bringing Kevin back safely.

Your knowledge, expertise and dedication to this matter, under difficult and potentially dangerous conditions is not only a credit to you, but also your profession. Your work was OUTSTANDING!!!!!  The police detectives in OC with whom you coordinated this investigation were most complimentary to you.

Bob, you are indeed a true professional and a very dear friend.  God Bless!"


John and Rita Warren, Ocean City, New Jersey

9.  "It is my pleasure to recommend Zimmerman Investigative Services for all your student residency investigations.  The Greenwich Township School District has used Zimmerman Investigative Services for several student residency investigations over the last three years.  Mr. Zimmerman's investigations are extremely thorough, detailed oriented and are completed in a timely fashion.  I would strongly recommend his services to other school districts or anyone else in need of hiring a licensed private investigator.

The amount of knowledge that Mr. Zimmerman has from his previous law enforcement position has helped our district out on numerous occasions.  Mr. Zimmerman goes over and above what he should do to assist you with your problems.  

Again, I recommend Zimmerman Investigative Services without reservation."

Scott A. Campbell, Business Administrator / Board Secretary - Greenwich Township School District

10.  "Finding Mr. Zimmerman and his team has helped me win cases.  There is simply no other way to describe his services other than exceptional.  My clients compliment his professionalism, speed and fair pricing.  My firm will not use a different investigation team on any case."

Bruce K. Warren, Esq. - Warren Law Group, PC 

11.  "Professional, thorough, discrete and timely...  I can't say enough about the level of service Zimmerman Investigative Services provides.  I would recommend highly, and without reservation.  Prepare to have your expectations exceeded." 

Dr. Nancy Cresse, DNP, ANP. 

Rutgers University

12.  "I’ve used Zimmerman Investigative Services and was very impressed with Bob as he quickly met with me and effectively evaluated my situation.  He provided me with a couple of plan options, updated me throughout the investigation process, and upon completion provided me with a professional and comprehensive report.  All his work was within the reasonable cost estimation that he provided at the onset.  Bob is honest and a true professional, whom I highly recommend!"

Ben Guzzardi - Title Insurance Account Manager

13.  "I’m very thankful for the services I received from Robert Zimmerman.  I think most people who hire a PI find themselves in a less than desirable situation.  Mr. Zimmerman was not only extremely efficient, a quick thinker, and extremely resourceful he was also extremely compassionate towards my situation and showed genuine care.  I’d recommend him to anyone who needs this type of service.  You won’t be let down." 

Anonymous Female Client - Child Custody Case

14.  "Bob went well above what I ever expected from him.  His rates are fair but his services are far above what you’d expect from what he charges.  He’s a man on a mission and won’t stop until he figures everything out.  He’s very quick to figure things out and think on his toes.  He’s also very communicative.  You wont find someone better.  Or more affordable.  He’s your guy." 

Eddie Rider - Former Law Enforcement