White content graphic showing shapes from the bottom right corner

Silverseal Senior Leadership Executive Bios

Executive Bios

Silverseal’s leadership team is comprised of senior law enforcement and military professionals with expertise in security management, complex investigations, security consulting services, executive protection, event security, training program design and management, site and risk assessment, and surveillance.

Contact Us

Professional headshot of John Silverman

John Silverman | Chairman and Founder

John Silverman founded Silverman Associates in New York City in 1988 conducting complex investigations. In 1995, the business expanded to include global security and risk management services as Silverseal. Today, Silverseal stands at the top of the industry with John Silverman’s mandate for trust, professionalism, honesty and transparency to always guide our service principles.

Professional headshot of Patrick Timlin

Patrick Timlin | CEO

Patrick Timlin oversees the management and long term growth of all divisions of Silverseal. Patrick is a member of the New York State Bar and a retired Deputy Commissioner of the NYPD. Drawing from his experiences in corporate security program development, organizational management, complex investigations, business continuity and law enforcement, Patrick specializes in high consequence threat prevention.


Howard berry is the chief operation officer

Howard Berry, MSc | Chief Operating Officer

Howard designs, aligns, and oversees Silverseal’s operational delivery of creative solutions to our clients. Howard is former Warrant Officer Class 1 with the British Army. Since retiring from the Military in 2010 Howard worked for almost a decade in Corporate security extensively in the Middle East.  He has a Master’s Degree in Strategic Management and Leadership (2018). He has recently taken Silverseal UK through the SIA’s Approved Contractors Scheme (ACS) and the ISO 9001 Accreditation process.

Michael griffin is the chief corporate development officer

Michael Griffin | Chief Corporate Development Officer

Michael Griffin executes the strategic growth vision and leads Silverseal’s business development efforts across the globe. Michael was most recently Managing Director of MJG Global, a comprehensive consulting company specializing in business continuity and emergency preparedness planning, counter terrorism threat and intelligence analysis, risk and vulnerability assessments, and physical security program creation and training. Michael is a graduate of the United States Coast Guard Academy and retired with the rank of Commander.


Professional headshot of James Donohue, CPP

James Donohue, CPP | Senior Vice President, Administration

James is a Certified Protection Professional (CPP) and is responsible for providing strategic and operational leadership in support of all Silverseal’s subsidiaries.  Throughout his career, James has held almost every position in the private security industry, up to Executive level.  James is an active member with the American Society of Industrial Security (ASIS) and specializes in creating and implementing corporate policy, planning and managing the utilization of manpower & physical resources, Human Resources, Compliance and budget/financial management.

Professional headshot of John J. Kelly

John J. Kelly | Director, Investigations

John is a retired NYPD Detective with more than 20 years of law enforcement experience. John’s career included assignments in the Organized Crime Control Division conducting complex narcotics and firearms investigations. He was awarded the “OCCB” Outstanding Achievement Award for his management and successful conclusion of numerous complex investigations. He also served as a member of the Joint Firearms Task Force where he was the recipient of the prestigious Combat Cross – awarded for acts of extraordinary heroism while under fire.  He is a graduate of St. Francis College with a BA in Sociology and Criminal Justice and achieved a master’s degree in Protection Management from John Jay College of Criminal Justice.

Professional headshot of John Reynolds, MSyl

John Reynolds, MSyl | Director, UK

John directs Silverseal in the UK together with leading on due diligence, investigations and business development. John is a former career detective with the Metropolitan Police where he specialised in the investigation of serious crime. Prior to joining Silverseal, John was the Head of Security & Investigations for a casino group in the UK. John is a member of the City of London Crime Prevention Association, TINYg and the Security Institute. Learn more about Silverseal EMEA team here.

Professional headshot of Andrew Borwick

Andrew Borwick | Director, Business Development

Andrew Borwick is responsible for providing global quality assurance within all of Silverseal’s business divisions. Andrew is a former British Army Infantry Officer and uses his experience to drive operational success within the corporate environment.  Based in our London office Andrew oversees new global initiatives, ensuring alignment and quality are forefront.

Get in Touch