Charles Marino
Chief Executive Officer
Mr. Marino served as a Supervisory Special Agent in the United States Secret Service (USSS) under three Presidents, ensuring individual and family safety across various locations and while in-transit.
Mr. Marino also led a 1,300-member Electronic Crimes Task Force to effectively investigate complex financial and cyber-crimes.
Nikki Rutman
Managing Partner - Global Intelligence
Ms. Rutman has over 20 years of intelligence experience in the US Intelligence Community (USIC). Much of her time was spent with the Federal Bureau of Investigation, where she has experience building and growing intelligence programs as well as writing and briefing intelligence products. She has previously worked for the Director of National Intelligence as an Adviser on Terrorism to a Mission Manager and as a counterintelligence analyst with the Defense Intelligence Agency. In the private sector, she built the intelligence program at Moderna, a pharmaceutical company based in Cambridge, Massachusetts.
Keith Gessner
Managing Partner - Private Client Services
Mr. Gessner brings over two decades of federal service to Sentinel, including as a U.S. Secret Service Special Agent, five of those with the elite Presidential Protective Division. His extensive experience includes protecting U.S. Presidents, foreign heads of state, and senior government officials. Keith's vast US government and private sector experience in protective design, operations, investigations, and client relations will continue to guarantee exceptional services to the wide array of existing and future clients of the firm.
Stacy Aguilar
Director of Operations
Ms. Aguilar's expertise spans various facets of the sports industry, encompassing her pivotal roles in international competitions and football development initiatives with FIFA, Concacaf, and the United States Soccer Federation. Her career has been marked by diverse accomplishments, from spearheading the development and execution of credential and access management at the Chase Center in San Francisco, the home of the Golden State Warriors, to overseeing the implementation of crucial COVID-19 protocols for Major League Baseball. Her contributions as an assigned match coordinator and venue coordinator for Concacaf matches, coupled with her instrumental role in team services operations for the United States Soccer Federation, underscore her multifaceted experience and commitment to excellence within the sports realm.
Mark Sullivan
Lance Hamilton
Senior Advisor
Mr. Hamilton is a former Senior Intelligence Service (SIS-4) Executive, Operations Officer and 31-year veteran of the Central Intelligence Agency’s (CIA) National Clandestine Service (NCS). Hamilton served as Chief of Station (COS) for three of the CIA's flagship stations in the Middle East, Southeast Asia and Eastern Europe. He led some of the USG’s most significant Counter-Terrorist Operations for six years post 9/11, resulting in thwarted attacks and enhanced protection of the U.S. homeland.
Jaimy Chadam
Advisor
Mr. Chadam creates bespoke solutions at the intersection of Tech, Telecom, Software, and Media, often leveraging Bering’s global network to help clients navigate both crisis and opportunity. Known for introducing the right partners, he brings a trusted, client-first approach. Previously a Senior Partner at EY-Parthenon and Accenture Strategy, he has worked with over 100 companies across the globe on everything from $25B deals to micro-marketing tests. He holds a BA from the University of Chicago and an MPP from UC Berkeley.
