Professional Surveillance Services in Pennsylvania

Bringing you over 30 years of experience and knowledge to get you the evidence that you need.

GET STARTED! (215) 338-3303

Lost loved one? Need help locating a witness?

We have the technology, team and experience to help you find anyone, anywhere.


Need documents served? Want a professional to serve a subpoena?

Let the professionals at PSC handle that for you!


Investigation Services


Whether you are trying to prove infidelity or looking for evidence of fraud our surveillance footage will provide you with all of the evidence that you need to support your claims in a court of law.

National Locates

Finding people is part art, part science. If you’re looking for a lost loved one, friend or witness we have the technology, connections and skills available to help you find them no matter where they are in the country.

Process Serving

Don’t run the risk of your case getting dismissed because of improperly served documents, like subpoenas. We are knowledgeable in all of the legislation surrounding service of process and can serve all of your legal documents properly and efficiently.

Background Checks

Our state of the art Intelligence Information System yields effective searches with a comprehensive collection of information. If you’re in the need of a detailed background check we can provide you with the documentation that you need/want.

Professional. Certified. Reliable.

Certified by PALI,  Pennsylvania Association of Licensed Investigators


Pennsylvania Association of Licensed Investigators

Certified by NCISS,  National Council of Investigation and Security Services


National Council of Investigation and Security Services

About Gary Definis, LPI

Since beginning my investigative work in 1990, I have served hundreds of clients ranging from law firms to insurance companies to private citizens and have conducted thousands of surveillance investigations in Philadelphia and surrounding areas. In the last 30 years, I have prided myself not only in obtaining the evidence that was needed, but in doing so in a way that is professional, confidential and ethical at every stage of the investigation for all parties involved.

While my specialty is surveillance, I also specialize in nationwide locates, background checks, and process serving and subpoenas. If you’re looking for an experienced and reputable private investigator in the Pennsylvania area, give us a call.