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Jeff joined Concentric in 2010 and became CEO in 2024, having served previously as President and EVP of Security Operations. During his career Jeff has managed a variety of complex and sensitive security operations domestically and internationally. Prior to joining Concentric, Jeff served in the U.S. Army for 4 years and for the USG for 12 years, including multiple overseas tours.
Casey leads the Information Technology team at Concentric with an emphasis on cybersecurity and digital privacy. His experience has spanned the public, private, and non-profit sectors including military service in the U.S. Marine Corps and a variety of startup, SMB, and Fortune 500 companies. He has implemented and maintained information systems on five continents including multiple deployments to combat theaters in the Middle East.
Mark joined Concentric as the Chief of Growth and Strategy in 2025. Prior to joining the Concentric Senior Leadership Team, Mark spent more than two decades in the CIA with multiple tours as a Chief of Station and field leader, and six years as the Director of Global Intelligence, Crisis Management and Executive Protection at The Starbucks Coffee Company. Mark is a Cipher Brief National Security Expert and the author of the Chalk Marks column with the Cipher Brief.
Laura assumed the role as Head of Operational Integration in SEP 2024 after having served Concentric over the last 4.5 years as Chief Impact Officer, EVP of Risk Solutions, and Chief of Staff. In her role, Laura leads the post-M&A change management to ensure seamless integration. Hoffner develops strategies to merge processes, technology, and cultures, collaborating with stakeholders to drive efficiency and manage risks. Laura continues to lead the company’s 501(c)3, The 188 Foundation.
Laura utilizes her unique range of crisis and security experience from 14 years as a Naval Intelligence Officer supporting elite special operations in combat zones and diplomatic opportunities around the world. Laura is also on the HostageUS Board of Advisors, supporting hostages/wrongful detainees and their families.
With two decades of experience in human resources, administration, and business operations, Lindsay Mayer has excelled in leading teams and driving impactful changes across organizations. Her career is marked by a strong focus on employee relations, where she has successfully cultivated positive work environments and addressed complex issues. Lindsay’s expertise extends to system implementation and process improvements, where she has consistently introduced innovative solutions that enhance operational efficiency and streamline business functions. By focusing on both the strategic and operational aspects of her roles, Lindsay has contributed significantly to the success and growth of the organizations she has been part of.
Christian leads our security consulting business, which delivers a range of strategic advisory and solution-design services for private, corporate and philanthropic clients. Adept at creative problem-solving, he has tapped into over 37 years of military and commercial risk management experience when consulting on projects as diverse as enterprise risk assessments and rainforest protection. Christian is passionate about environmental security and also leads the Concentric Green Team in their mission to minimize and offset the negative impacts of our business.
Yari leads the Global Intelligence Team at Concentric. She brings two decades of experience in strategic and tactical intelligence, supporting the world’s most elite in counterrorism operations all over the world. Over the past 20 years, she spent over 10 tours overseas supporting combat operations.
Mike brings a proven track record of supporting and staffing Executive Protection needs for high-net-worth individuals, family offices and CEOs both domestically and internationally. Mike has a strong understanding of tactics and security needs in relation to executive protection.
Prior to joining Concentric, Mike has over two decades of experience ranging from serving in the 75th Ranger Regiment, Law Enforcement, Executive Protection, and High Threat Protection in support of the Department of State in Afghanistan.
Monica is the Director of Growth Operations, supporting the sales team with streamlined processes, data insights, and operational efficiency. Previously, she spent four years as Marketing Manager and Director of Marketing and Strategic Growth for Concentric, driving brand expansion, marketing initiatives, and sales operations. Optimizing sales workflows, implementing scalable tech and work-flow systems, and leveraging data-driven strategies, Monica ensures the sales team operates at peak efficiency. Her background in marketing and growth strategy provides a unique perspective in aligning sales operations with broader business objectives.
Mike retired from the Navy in 2018 after rising to the rank of four star admiral. He culminated his career with a four plus year stint serving simultaneously as Commander, U.S. Cyber Command and Director, National Security Agency – creating the U.S. Department of Defense’s (DoD) then newest large war fighting organization and leading the U.S. government’s largest intelligence organization. In those roles he worked extensively with the leadership of the U.S. government, the DoD, and the U.S. Intelligence community as well as their international counterparts in the conduct of cyber and intelligence activity across the globe. He also assisted in the development of national and international policy with respect to cyber, intelligence and technology – including extensive work with corporate leadership in the finance, IT, telecommunications and technology sectors.
Mike is a graduate of Auburn University and also holds a Masters of Science in National Security. He is a distinguished graduate of the National war College and a graduate of highest distinction from the Naval War College. He is also an MIT Seminar XXI fellow and a Harvard Senior Executive in National Security alum.
Suzanne Kelly is Founder, CEO & Publisher of The Cipher Brief, a national security focused media organization. Kelly is also founder of The Cyber Initiatives Group, a group of leading cyber experts that applies broad national security expertise to the cyber challenge. In addition to TCB and CIG, Kelly also produces The Cipher Brief’s Annual Threat Conference. She is a former CNN Intelligence Correspondent and Executive Producer.
Michael has served as a researcher at MIT for over three decades and a Visiting Scholar in the Imperial College Department of Innovation and Entrepreneurship for over one decade. He has advised segments of the national security community on cyberconflict and cybersecurity issues. He has also served as an advisor on innovation issues and investments to major firms, including Mars, Procter & Gamble, Google, Intel, BT, Siemens, NASDAQ, IBM, and Alcoa. Michael has been a contributor to such prestigious publications as the Harvard Business Review, Sloan Management Review, the Financial Times, The Wall Street Journal, strategy+business, IEEE Software, and the Design Management Journal.
An expert in cross-cultural communication, intelligence/security capability building and the
cyber/technical security operational dimension, Andy lectures at several UK and European universities and is an Honorary Fellow of the Security and Strategy Institute at Exeter University. Andy has delivered technical security and intelligence capability building, mentoring, and advisory services to governments in Europe, the Middle East, East Africa and the Gulf.
Currently, his consultancy advises both governments and government partners, including
several major international companies, on solving complex national security challenges.
These include national security strategy validation, cyber defence, strategic communication and intelligence management.
Andy has over 20 years of experience as a British diplomat specialising in intelligence and security. Serving in various operational, liaison and leadership roles, he was deployed to Pakistan and Afghanistan several times between 1999 and 2011 and held diplomatic posts in Northern and Southern Europe, Latin America, and South Asia. In the late 1990s, Andy was seconded to the Ministry of Defence in a counter-terrorism operational role and later to GCHQ as an operational adviser. Andy also served for 11 years in the British military, in infantry and intelligence roles, in NATO, Europe, Central America, Germany and Africa.