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Areas Served

Diogenes LLC provides local, regional, national & international investigative services. Associates are located throughout the United States. Affiliates are posted in most major international cities.

What Sets Us Apart

Diogenes LLC provides quality investigative services. Our philosophy is simple, provide value added service for a reasonable price that meets the needs of our client.

What makes Diogenes LLC an industry leader is:

  • Well trained & equipped investigators.
  • Databases containing over 30 billion records.
  • Management with 30+ years experience.
  • Code of Ethics.
  • Knowing that we are only as good as our last assignment!

Client Service Policies and Practices

We take pride in the investigative services we offer and perform. All information gathered is guaranteed 100% accurate as reported to our agency.

Pricing structures are customized. Each client is unique as are their investigative needs. We accept MasterCard, Visa, American Express, & Discover Card.


Bradford ColeBradford Cole, CFE

Managing Member and Senior Investigator in Charge of the agency. Brad's background encompasses thirty-four (34) years investigative experience. He holds the international designation of Certified Fraud Examiner (CFE).

Previously, he was a Vice President of a contract security service, Director of Loss Prevention for a national retailer, and Director of Operations of a regional investigative agency.

Brad's education; Northeastern University (BS Criminal Justice), Champlain College (AS Law Enforcement) and University of Vermont (BS Business Administration). He also holds advanced training certificates from Reid & Associates and American Society for Industrial Security (ASIS).

Affiliations include ASIS, USAPI, NAIS, ACFE, CALPI, & Reid Institute. Brad lectures to both private industry and law enforcement on Theft, Fraud, Counterfeiting, & Economic Espionage issues.
Paul Ruzbarsky, Jr.Paul Ruzbarsky, Jr.

Senior Investigator with over twenty-three (23) years experience investigating retail theft and fraud. He has worked a variety of progressive Loss Prevention / Asset Protection positions throughout the New England area. Most recently as a Regional Loss Prevention Manager with one of the nation's largest retail pharmacy chains, with over 7,000 stores across 41 states. His experience offers our clients a depth of retail investigations not often found in a Private Investigation Agency.

Paul has combined his experience with a Criminal Justice education at the University of New Haven and following up with continued Criminal Justice courses at Sacred Heart University. He is also a graduate of the Wicklander-Zulawski & Associates from their Interview and Interrogation Program.
William QuinonezWilliam Quinonez

Senior Investigator overseeing the New York City area. His investigative background entails fifteen (15) years of both public and private sector experience in a variety of fraud, revenue enforcement and undercover investigations.

William's operational and hands-on experience provides the perspective necessary to meet our clients' goals. His in-depth knowledge of New York City's 5 Boroughs and its investigative resources is not easily found in New York City investigative agencies.

Prior to joining Diogenes LLC, Wiliam was formerly: New York City Taxi & Limousine Commission (NYCTLC) Inspector New York City Office of Investigations, Revenue and Enforcement Administration (IREA) Fraud Investigator Commercial Private Sector - Undercover Operative
Gail AppellGail Appell

Managing Member of Research Services. Gail's background entails twenty (20) years of experience in the banking, human resource, and employment screening service sectors.

Ms. Appell established Research Services in 1996 to assist businesses with their pre-employment screening needs.
Dorran M. DelayDorran M. Delay

Managing Member of DataTrack Resources. His background entails twenty (20) years of experience in the banking, financial, and computer IT service sectors.

Prior to joining Diogenes LLC, Dorran spent 9 years as Senior Vice President, Chief Operating Officer at Great Country Bank in Ansonia, CT, having responsibility for branch operations, Information Technology, Security and lending operations. Prior to that, he spent 12 years at Society for Savings as Director of Bank Operations.

This unique blend business and investigative experience allows Dorran to conduct computer related investigations sensitive to the client's needs and business model.
Rob MuesselRob Muessel

Principal of TSCM Technical Services. Rob's background entails twenty-five (25) years of experience in the electronic surveillance and cover equipment arenas.

Prior to founding TSCM Technical Services, he was Director of Technical Services for Information Security Associates, Inc., in Stamford, CT. ISA is one of the cutting edge developers and manufacturers of eavesdropping detection products in the United States. Rob joined ISA in 1983 and had led the TSCM program since 1989. Under his guidance, sweeps were made for clients located throughout the United States and countries throughout the world. He was also in charge of ISA’s in-house training programs and was responsible for international and North American equipment sales.

Prior to joining ISA, Rob was a program manager for a security systems company that provided integrated security systems to the nuclear power industry. He has a strong background in telecommunications systems, radio technology, physical security, and overall security issues.

Rob's extensive electronic surveillance & countermeasures experience provides an unparalleled level of expertise and confidence to Diogenes' clientele.


Diogenes LLC holds CT Private Detective License #A-2042. Services provided in other states or countries are rendered under that local associate's and/or affiliate's license and/or registration if required by law and/or regulation.

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