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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.

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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.



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.


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.


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.


Joseph Fox | Chief of Staff

Joseph Fox is responsible for staff development, which includes leadership development training, as well as program development, branding, and marketing at Silverseal. Prior to joining the company, Joseph was Chief of Transit for the NYPD. At Silverseal, Joseph ensures that all activities are aligned with our corporate objectives, our mission statement and core values.


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.


Eddie Engel | Vice President, Investigations & Close Protection

Edward coordinates and manages complex investigations and leads efforts to grow and enhance the investigative and close protection divisions of Silverseal.  Edward retired as a First Grade Detective from the NYPD after 27 years of service.  While with the NYPD he was assigned to the New York Joint Terrorism Task Force, Police Commissioner’s security detail, and the Bronx Detective and Organized Crime Control Bureaus.  Edward served in the United States Marine Corps and is a Gulf War Veteran.


Joseph Clausen | Vice President, Finance

Joseph Clausen oversees the finance department at Silverseal. He is responsible for the company’s financials, accounting, FP&A, tax and compliance. Joe has over 20 years of experience with budgets, forecasts, and financial reporting at CBS Sports and Time Inc. He graduated from the NYU Stern School of Business with an MBA in Finance, and Boston College with a BA in Economics.


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.

Michael Adler | Director, Special Operations

Michael Adler, a retired NYPD Lieutenant, oversees the training of all Silverseal security personnel in North America to ensure that they possess comprehensive knowledge of industry and client-based safety and security protocols. Michael’s mandate is to ensure that all security professionals possess not only core competency skills, but also exceptional hospitality, counter-surveillance and counter-terrorism skills.

Andrew Borwick | Director, Quality Assurance & Compliance

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.

Mark Lundy | Manager, Accounts

Mark Lundy is the Account Manager for Silverseal’s Colorado Region. Mark has 13 years of corporate security overseeing Class A high-rises, relocation and evacuations and specializes in training tenants and security professionals in emergency procedures.

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