Jack Lynch

President and Founder

Jack served as a member of the New York City Police Department for more than 20 years retiring with the rank of Detective 2nd grade. His tenure with the Police Department allowed Jack to acquire extensive investigative knowledge and experience. During a storied career with the Police Department, Jack investigated thousands of crimes, including many very high profile cases while assigned to the Manhattan Detective Division. This extensive experience allowed Jack to develop very close and personal relationships with colleagues from other law enforcement agencies including: the N.Y.C. District Attorneys Office, F.B.I., D.E.A., and the U.S. Secret Service. His tenaciousness, dedication and attention to detail were legendary within the Detective Bureau and responsible for an incredibly high clearance rate.

Upon his retirement from the NYPD, Jack obtained his private investigators license and entered the private security industry. In 1991, Jack formed and launched Park Avenue Security. Drawing from his vast law enforcement experience, his personal relationships within the law enforcement community and his business acumen, Jack developed an innovative security approach to meet the needs of his clients. A security program that is smart, comprehensive, client specific and most importantly, cost effective.

His business approach is simple but effective:

- Offer clients an array of security related services based on a solid foundation of knowledge, experience, integrity, and results.

- Offer clients these quality security services at a reasonable cost.

Since its incorporation in 1991, Park Avenue Security has adhered to this business philosophy and continues to provide its clients with proven results, at an extremely reasonable cost.

Dennis O'Brien

Director of Operations

Dennis served as a member of the New York City Police Department for more than 26 years, retiring in the rank of captain of Police. During his tenure, Dennis served in many operational and administrative functions including: Commanding Officer of the 106th Precinct, Commanding Officer Transit Bureau District 20, and Executive Officer of the 5th and 7th Precincts and the Communications Division. In these assignments, Dennis acquired a considerable amount of experience as both a manager and problem solver. He is a strong proponent of the “Broken Windows” theory, which advocates a robust security presence combined with a pro-active and aggressive enforcement strategy. He believes that the keys to success require thorough planning and preparation, intensive and continuous training and close and concentrated supervision.

Upon retiring from the Police Department, Dennis joined Park Avenue Security as the Director of Operations. In this capacity Dennis is responsible for the day to day operations of the company and has been responsible for instituting many innovative security programs and strategies which have enhanced both the delivery and quality of Park Avenue’s security services. Dennis closely monitors all aspects of the services provided by Park Avenue Security to its clients to ensure that they are complete, thorough, comprehensive, and delivered at a reasonable cost.

Steve Dirienzo

Senior Account Manager

Steve served with the New York City Police Department for more then 20 years, retiring in the rank of Lieutenant, Special Operations Commander. In addition to serving in several patrol, administrative and investigative assignments, Steve commanded an elite and specialized city wide vandal unit. This unique and remarkable unit consisting of highly skilled police officers, detectives and supervisors was created to specifically target graffiti vandals responsible for causing millions of dollars in property damage to both public and private property.

Under Steve’s leadership, determination and critical problem solving ability, new and innovative, investigative, evidence and data collection techniques were developed to meet this emerging and serious crime challenge. Utilizing these newly created techniques, Steve’s team was responsible for tracking, identifying, apprehending and successfully prosecuting the most prolific and recidivous vandals. As a result of their efforts, Steve’s vandal unit was recognized by both the mayor’s office as well as the MTA for their outstanding work in meeting this important crime challenge and formulating an innovative plan of action that significantly reduced graffiti throughout the city of New York .

In 2001, Steve joined the senior management staff of Park Avenue Security as its Senior Account Manager. In addition to his extensive experience with managing and supervising, both personnel and resources, Steve will bring to bear the same talents, determination and ingenuity in managing Park Avenue’s accounts that served him so well while a member of the police department. Steve will serve as your primary point of contact with Park Avenue Security, ensuring the quality of our service, monitoring our performance and coordinating our efforts.

Robert Santavicca

Account Manager

Robert served as a member of the New York City Police Department for more than 22 years, retiring in the rank of Sergeant. During his Police career, Rob served in many operational, administrative and investigative positions. From supervising a highly successful plainclothes anti-crime team while assigned to Street Crime to commanding an elite group of investigators while assigned to the Internal Affairs Bureau, Rob has demonstrated the leadership ability and supervisory skills necessary to successfully accomplish any task he is assigned.

In 2001, upon retiring from the police department, Rob joined the senior management staff of Park Avenue Security as an Account Manager. Since joining Park Avenue, Rob has managed several important and challenging accounts. These accounts are as environmentally, occupationally, and geographically diverse as the security challenges that they present. Rob’s extensive knowledge of security related issues and programs combined with his past Law Enforcement Experience have proved to be extremely successful in producing safe, secure and orderly environments for his clients. His philosophical approach is simple: “do your job and always do it to the best of your ability.”