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TEAM

Meet the People of The Chertoff Group

about Our principals have worked closely together for years, as leaders of the Department of Defense, the Department of Homeland Security, the Department of Justice, the National Security Agency and the CIA.

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We’ve seen each other under pressure – the kind of pressure most people would never want to see, with thousands of lives or even the whole nation’s security at stake, with no time to spare and usually with limited information. We came through it together. And the United States came out stronger.

We reorganized the country’s disaster response system, so we’ll never again see anything like the aftermath of Hurricane Katrina. We vastly improved interagency communications, so federal and local agencies won’t be in the dark about who’s doing what. We developed a whole new approach to border security and counterterrorism.

We came to know each other under the most trying circumstances. We came to trust each other with our lives. We work incredibly well – together – under pressure. And once you get to know us, you’ll understand how valuable we can be to securing the future of your organization.

 

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Michael Chertoff
Michael Chertoff
Michael Chertoff
 

 

Michael Chertoff

Co-Founder and Executive Chairman

As Secretary of the U.S. Department of Homeland Security from 2005 to 2009, Michael Chertoff led the country in blocking would-be terrorists from crossing our borders or implementing their plans if they were already in the country. He also transformed FEMA into an effective organization following Hurricane Katrina. His greatest successes have earned few headlines – because the important news is what didn’t happen. more >>>

Jason Kaufman
Jason Kaufman
Jason Kaufman
 

Jason Kaufman

Managing Principal

Jason Kaufman is Managing Principal of The Chertoff Group, a premier global advisory firm that focuses exclusively on the security and risk management sector by providing business strategy, risk management, and mergers and acquisitions (M&A) advisory services to clients seeking to secure and grow their enterprises. With an accomplished career focused on advising professional services and technology firms in the national security, defense and information security markets, Mr. Kaufman oversees the Firm’s activities to ensure clients benefit from the full breadth of the Firm’s capabilities.  more >>> 

Chad C. Sweet
Chad C. Sweet
Chad C. Sweet
 

Chad C. Sweet

Co-Founder

Chad Sweet is a Co-Founder of The Chertoff Group, a global advisory firm and investment bank exclusively focused on the security sector. Mr. Sweet formerly served as the Chief of Staff of the United States Department of Homeland Security (DHS). Prior to becoming Chief of Staff of DHS, Mr. Sweet worked as an investment banker at the firms of Morgan Stanley and Goldman Sachs as well as served in the CIA's National Clandestine Service. more >>>

 

 

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Jayson Ahern
Jayson Ahern
Jayson Ahern
 

Jayson Ahern

Principal

On January 2, 2010, Jayson P. Ahern retired from 33 years of federal service to both the U.S. Customs Service and U.S. Customs and Border Protection. At the time of his retirement, he had served for nearly a year as Acting Commissioner of U.S. Customs and Border Protection (CBP) and was responsible for securing, managing and controlling our Nation’s borders. more >>>

 

 

Charles Allen
Charles Allen
Charles Allen
 

Charles Allen

Principal

At DHS, Charles E. Allen developed the department’s intelligence architecture, integrated its intelligence activities and ensured that they were continuously aligned with the department’s evolving priorities. He also accelerated and expanded the department’s processes for sharing intelligence with state and local security and law enforcement officials. more >>>

 

 

 

Jay Cohen
Jay Cohen
Jay Cohen
 

Jay Cohen

Principal

Innovative problem solving and science and technology have always been among Jay M. Cohen’s strong points: Early in his naval career he mastered Nuclear Power Training and later commanded a nuclear submarine. He followed that with stints as a senior member of the Nuclear Propulsion Examining Board for the U.S. Atlantic Fleet; command of a major surface ship, Director of the Navy Y2K Project Office; and Chief of Naval Research. more >>>

 

 

 

Michael Hayden
Michael Hayden
Michael Hayden
 

Michael Hayden

Principal

As Director of the Central Intelligence Agency, General Michael Hayden was responsible for overseeing the collection of information concerning the plans, intentions and capabilities of America’s adversaries; producing timely analysis for decision makers; and conducting covert operations to thwart terrorists and other enemies of the US. more >>>

 

 

Nathaniel Fogg
Nathaniel Fogg
Nathaniel Fogg
 

Greg Hill

Principal

Greg Hill is a Principal at The Chertoff Group, where he advises clients on both strategic growth and business opportunities in the national security marketplace, and how to best identify threats, reduce vulnerabilities, and protect their most critical assets, both domestically and internationally.  In addition, Mr. Hill serves as a partner of TCG Capital Partners, The Chertoff Group’s primary vehicle for investment activities. more >>>

 

 

Adam Isles
Adam Isles
Adam Isles
 

Adam Isles

Principal

Adam Isles is a Principal at The Chertoff Group, where he helps clients evaluate and mature their security risk management programs.  Mr. Isles has managed security services engagements for clients in a number of industries, including financial services, retail, transportation, food and agriculture and utility sectors.  more >>>

 

 

 

Jason Kaufman
Jason Kaufman
Jason Kaufman
 

Rod Jones

Principal

Rod Jones is a Principal with The Chertoff Group. With more than 20 years of experience on mergers & acquisitions, Mr. Jones is a seasoned financial professional with high-level understanding of private equity and investments.  more >>>

 

 

Jason Kaufman
Jason Kaufman
Jason Kaufman
 

 

David Leach

Principal

David Leach is a Principal at The Chertoff Group where he advises clients across all stages of the business lifecycle.  In this position, Mr. Leach provides strategic advice to Chertoff Group clients to help them achieve their growth objectives with a focus on the defense, intelligence, security, and government services sectors. Prior to joining The Chertoff Group, Mr. Leach spent thirteen years at Goldman Sachs in the Investment Banking Division, most recently as a Managing Director in New York City.  more >>>

 

 

 

Jim Pflaging
Jim Pflaging
Jim Pflaging
 

Jim Pflaging

Principal

Jim Pflaging is the global lead for The Chertoff Group’s business strategy practice. He and his team work closely with leading technology companies, private equity investors, and system integrators to identify, provide diligence, acquire, and build exciting companies. He has a proven track record of translating cybersecurity and related technology, policy, and market dynamics into competitive advantage. Through dozens of successful client engagements, Jim has become a trusted advisor on technology and security to many in the US Government and private industry.   more >>>

Mark Weatherford
Mark Weatherford
MarkWeatherford
 

Mark Weatherford

Principal

Mark Weatherford is a Principal at The Chertoff Group and advises clients on a broad array of cybersecurity services. As one of the nation’s leading experts on cybersecurity, Mr. Weatherford works with organizations around the world to effectively manage today’s cyber threats by creating comprehensive security strategies that can be incorporated into core business operations and objectives. Prior to joining The Chertoff Group, Mr. Weatherford served as the U.S. Department of Homeland Security’s first Deputy Under Secretary for Cybersecurity within the National Protection and Programs Directorate. more >>>

 

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Debbie Eng
Debbie Eng
Debbie Eng
 

Debbie Eng

Managing Director and Chief Operating Officer

Debbie Eng is a senior member of The Chertoff Group's Business Strategy practice area, which provides strategic advisory services to clients with innovative, security-oriented technologies and services. In this position, she works closely with technology firms to develop growth plans focused on the federal market, including homeland security, defense, and the intelligence community.  Ms. Eng also works with private sector companies to augment business operations with comprehensive security strategies to counter today’s cyber threatsmore >>>

 

 

  

William Marshall
William Marshall
William Marshall
 

Jeremy Grant

Managing Director

Jeremy Grant is a Managing Director at The Chertoff Group, where he works with the Firm’s clientele to develop growth strategies, identify market solutions and advise on policy impacts across the information technology and cybersecurity and government services. In this role, Mr. Grant utilizes his diverse background and deep understanding of business, technical and policy issues around identity, privacy and cybersecurity, having served in a range of leadership positions spanning government and industry. more >>>

 

 

 

 

  

William Marshall
William Marshall
William Marshall
 

William Marshall

Managing Director

William Marshall brings to the Chertoff Group a broad base of expertise in intelligence and cyber-related matters after nearly 35 years of service at the National Security Agency/Central Security Service (NSA/CSS), where he held a variety of senior leadership, management, and analysis positions in support of the U.S. Intelligence Community and Department of Defense. more >>>

 

 

 

  

Katy Montgomery
Katy Montgomery
Katy Montgomery
 

Katy Montgomery

Managing Director

Katy Montgomery joins The Chertoff Group as a senior public affairs advisor focused on creating thoughtful and strategic communications plans to help clients be prepared and navigate through both anticpated challenges and unpredictable events.  During her career, she has served as a strategic communications advisor and spokesperson for senior government officials at the U.S. Department of Homeland Security, The White House, and U.S. Department of Education. more >>>

 

 

Bennet Waters
Bennet Waters
Bennet Waters
 

 

Bennet Waters

Managing Director

Bennet Waters has a successful record of senior leadership experience in a variety of public, private and federal government settings. He specializes in developing, implementing and optimizing entrepreneurial strategies that balance the need to minimize risks with maintaining the flow of commerce. more >>>

 

 

 

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Elizabeth Carter 
Richie Weiblinger
Richie Weiblinger
 

 

Davin Baker

Senior Director

Davin Baker joined The Chertoff Group after holding several business and technology leadership roles at top global cybersecurity companies including Blue Coat Systems, Solera Networks, and SafeNet. In these roles Mr. Baker exercised his technical and business acumen to identify unsolved market problems and deliver innovative solutions into the global Enterprise and Public Sector markets. more >>>

 

 

Elizabeth Carter 
Richie Weiblinger
Richie Weiblinger
 

 

Elizabeth Carter

Senior Director

Elizabeth Carter joined the Chertoff Group after serving as the Plan Manager for Weapons of Mass Destruction (WMD) for the New York City Office of Emergency Management, where she was responsible for the development of hazard-specific emergency plans to respond to Chemical, Biological, Radiological and Nuclear (CBRN) incidents. In this capacity, she worked closely with New York City agencies and other regional municipalities to foster interagency coordination and spearhead collaborative efforts to develop WMD playbooks and protocols. more >>>

 

 

Jason Mayer 
Katy Montgomery
Katy Montgomery
 

Jason Mayer

Senior Director 

Jason Mayer joins The Chertoff Group from the Central Intelligence Agency where he worked to identify and counter threats from our most dangerous adversaries.  Now at The Chertoff Group, he uses his in-depth understanding of today's security challenges to deliver solutions to help boardrooms and company leadership manage their risk in an increasingly dynamic security environment.   more >>>

 

 

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Ryan Hoffman
Ryan Hoffman
 

Ryan Hoffman

Director

Ryan Hoffman serves as a Director at The Chertoff Group in the firm’s M&A Advisory practice. With nine years of exclusive focus in the Defense, Technology, Security, and Government Services industry, Mr. Hoffman brings extensive investment banking experience in both private and public sell-side assignments, corporate divestitures, equity raises, and buy-side transactions for clients operating in the defense, intelligence, C4ISR, and government technology markets. more >>>

 

 

David London 
Ryan Hoffman
Ryan Hoffman
 

David London

Director

David London is a Director at The Chertoff Group, where he focuses on business continuity, cyber risk management, incident response planning and cyber simulations for our clients.  As a member of the Security Services practice area, David works with clients to help improve security operations and build effective enterprise-wide response capabilities that can help an organization recover from all types of hazards and crisis events.  He has led several high-profile strategic cybersecurity simulations and exercises, which have addressed the evolving cyber threat environment, the necessary elements to ensure a robust crisis management program, and ways to improve private-public sector coordination across critical infrastructure. more >>

 

 

 

 

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Emily Basta 
Veronica Gilbert
Veronica Gilbert
 

Emily Basta

Deputy Director of Operations

Emily Basta began work at The Chertoff Group in August of 2012. Ms. Basta provides high-quality support and professionalism in her day-to-day responsibilities which include complex planning and organization, a timely response to requests for information, and constant communication to ensure the appropriate level of coordination for important tasks. more >>>

Marjorie Chelius
Marjorie Chelius
Marjorie Chelius
 

Marjorie Chelius

Senior Associate

As a Senior Associate at The Chertoff Group, Marjorie Chelius uses her research and analytical skills to help clients achieve their growth objectives. While Ms. Chelius is involved in a wide range of projects that deliver strategic support to clients both domestically and internationally, she focuses her work in the Business Strategy practice area for The Chertoff Group, helping companies develop organic and inorganic growth strategies. more >>>

 

Anna Lusthoff
Ryan Hoffman
Ryan Hoffman
 

Anna Lusthoff

Deputy Director for Strategic Communications

As the Deputy Director for Strategic Communications at The Chertoff Group, Anna Lusthoff uses her strategic communications and analytical skills to create and execute thoughtful communication plans to help both clients and The Chertoff Group achieve their core objectives.   more >>

 

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Zach Miller  
Ryan Hoffman
Ryan Hoffman
 

Zack Miller

Associate

As an Associate at The Chertoff Group, Zack Miller provides strategic advisory services to clients ranging from multinational corporations and private equity funds to venture-backed technology and cybersecurity companies. Leveraging strong research and analytic capabilities, Mr. Miller helps clients calibrate strategy, evaluate new markets and investment opportunities, optimize business development, and achieve growth objectives.    more >>

Brendan Mulroy 
Ryan Hoffman
Ryan Hoffman
 

Brendan Mulroy

Associate

As an Associate at The Chertoff Group, Brendan Mulroy supports both the Security Services and Strategic Consulting lines of business through his knowledge and experience with physical security and risk management.   more >>

Alan Wehler  
Ryan Hoffman
Ryan Hoffman
 

Jensen Vessels

Associate

Jensen Vessels is an Associate at The Chertoff Group in the firm’s M&A Advisory practice. Prior to joining The Chertoff Group, Mr. Vessels served as an Associate at Aronson Capital Partners where he advised on more than 15 M&A engagements in the defense and government services market. more >>

Alan Wehler  
Ryan Hoffman
Ryan Hoffman
 

Alan Wehler

Associate

At The Chertoff Group, Alan Wehler utilizes his research and analytical skills to help clients achieve their strategic objectives through an informed understanding of the national security landscape.    more >>

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Zach Miller  
Ryan Hoffman
Ryan Hoffman
 

Spencer Davis

Senior Analyst

Spencer Davis is a Senior Analyst with The Chertoff Group, where she supports the Strategy Practice Area.  Prior to joining The Chertoff Group, Ms. Davis worked in the U.S. Department of State’s Bureau of Diplomatic Security as a contractor.  In this position, she traveled to Central and South America, as well as North Africa, to implement an IT management platform tracking security technology at U.S. embassies and consulates. more >>

 

 

Zach Miller  
Ryan Hoffman
Ryan Hoffman
 

Paul G. Doherty

Analyst

Paul Doherty is an Analyst with The Chertoff Group, where he provides strategic advisory services to companies in the security and defense sectors.  Prior to joining The Chertoff Group, Mr. Doherty worked as Special Assistant to the CEO at the software company VidSys, where he helped streamline core business processes for a federally registered small business in the national security sector.  more >>

 

 

Zach Miller  
Ryan Hoffman
Ryan Hoffman
 

Randall Drumheller

Analyst

Randall Drumheller is an Analyst with The Chertoff Group, where he provides merger and acquisition (M&A) advisory services to clients across the national security sector.  Prior to joining The Chertoff Group, Mr. Drumheller worked as an analyst at Kekst and Company, a strategic communications consultancy based in New York.  more >>

 

 
 
 
 

Zach Miller  
Ryan Hoffman
Ryan Hoffman
 

Casey Ivanauskas

Analyst

Casey Ivanauskas is an Analyst with The Chertoff Group’s Business Strategy Practice Area. Prior to joining The Chertoff Group, Ms. Ivanauskas worked as a research intern for Public International Law and Policy Group providing in-depth research and analysis on legal and policy issues concerning Syria and Yemen. She has additional experience with the Information Security Oversight Office as a national security intern and on Capitol Hill as a legislative intern for a Maryland Congressman. She has also conducted research on international security and development issues at the United Nations Institute for Disarmament Research and with Esperanza International, a Dominican microfinance firm. more >>

Zach Miller  
Ryan Hoffman
Ryan Hoffman
 

Alexandra Johnson

Analyst

Alexandra Johnson is an Analyst with The Chertoff Group’s Business Strategy practice area. Prior to joining The Chertoff Group, Ms. Johnson worked at the Department of Justice (DOJ) in the Criminal Division’s Office of Overseas Prosecutorial Development. At DOJ, she was tasked with identifying global security threats and creating associated development plans for overseas legal teams. She has additional experience at The Freedom Association, a London-based think tank where she studied the effects of European Union membership on the British economy. more >>

 
Ryan Hoffman
Ryan Hoffman
 

Hal Libby

Analyst

Hal Libby is an Analyst within The Chertoff Group’s Business Strategy practice area, where he focuses primarily on cybersecurity.

Based in The Chertoff Group’s Menlo Park, California office, Mr. Libby first joined The Chertoff Group in 2014 as an intern in the Washington, D.C. office, where he assisted on engagement across all lines of business. Prior to joining The Chertoff Group, Mr. Libby completed a policy internship for Senator Barrasso of Wyoming and conducted research on national security strategy for The Hudson Institute. more >>

 

 

Zach Miller  
Ryan Hoffman
Ryan Hoffman
 

Kelly McRaven

Analyst

Kelly McRaven is an Analyst with The Chertoff Group, where she supports both the Security Services and Strategic Consulting lines of business.  Prior to joining The Chertoff Group, Ms. McRaven worked as an intern in the Office of the Under Secretary of Defense for Policy at the U.S. Department of Defense, the Defense Intelligence Agency, and the House Armed Services Committee.   more >>

 

 

Zach Miller  
Ryan Hoffman
Ryan Hoffman
 

Robert Wieczorek

Analyst

Robert Wieczorek is an Analyst at The Chertoff Group where he supports the Security Services Practice Area through quantitative and qualitative research and analysis. Prior to joining The Chertoff Group, Mr. Wieczorek worked at the IC2 Institute, an interdisciplinary technology research and innovation center, where he provided management consultation to a large domestic insurance firm. Mr. Wieczorek also held a position at the Robert S. Strauss Center for International Security and Law, where he evaluated the effectiveness of good governance programs in Sub-Saharan Africa. more >>

 

 

 

 

 

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Shelly Achaibar 
Veronica Gilbert
Veronica Gilbert
 

Shelly Achaibar

New York Office Manager 

Shelly Achaibar uses her global experience and expertise from the Financial Services industries, Bio-tech and Emerging Markets to cultivate and maintain internal operation processes, provide scheduling and manage administrative support, and lead the overall team support for the firm. more >>>

 

 
Veronica Gilbert
Veronica Gilbert
 

Casey Determan

Special Assistant

Casey Determan joined The Chertoff Group in July 2014, where he serves as Special Assistant to General Michael V. Hayden, The Honorable Charles E. Allen, and Mr. William P. Marshall. Prior to joining The Chertoff Group, Mr. Determan gained valuable experience on Capitol Hill serving with Congressman Doc Hastings (R-WA) and Congresswoman Susan W. Brooks (R-IN) as well as with the House Committee on Homeland Security. more >>

 

 
Veronica Gilbert
Veronica Gilbert
 

Emily Dumont

Special Assistant

Emily Dumont joined The Chertoff Group in 2014, and currently serves as Special Assistant to Secretary Michael Chertoff and Jayson Ahern. In this role, Ms. Dumont provides high-quality support with complex planning and administrative logistics. more >>

 

Veronica Gilbert
Veronica Gilbert
 

Veronica Gilbert

Senior Financial Accountant

Veronica Gilbert joined The Chertoff Group in July of 2011 as the Senior Financial Accountant where she oversees the internal accounting functions of the company.  She has extensive experience working in this financial capacity at manufacturing firms, banking institutions, and franchise corporations. more >>>

 

Sarah Miller  
Veronica Gilbert
Veronica Gilbert
 

Andrea Katzer

Executive Assistant

Andrea Katzer joined The Chertoff Group in May 2015, where she serves as Executive Assistant to Principals Jim Pflaging and Mark Weatherford, providing high-level support in administrative planning and logistics. Based in the firm’s Menlo Park, California office, Ms. Katzer brings to the firm her global expertise and broad knowledge in the fields of cybersecurity, technology, financial services and law. more >>>

Sarah Miller  
Veronica Gilbert
Veronica Gilbert
 

Sarah Miller

Special Assistant

Sarah Miller joined The Chertoff Group in March 2013 as Special Assistant to Chertoff Group Co-Founder Chad Sweet.  A graduate of Old Dominion University’s College of Business and Public Administration, her degree in marketing has served her in both the private and public sector.  more >>>

 

 

Sarah Miller  
Veronica Gilbert
Veronica Gilbert
 

Elizabeth Van Horne

Executive Assistant

Elizabeth Van Horne is an Executive Assistant at The Chertoff Group where she supports to Jason Kaufman, Chad Sweet, Debbie Eng and Jeremy Grant. Prior to joining The Chertoff Group, Ms. Van Horne worked at Charity Brands Consulting, a consulting firm in Los Angeles specializing in corporate social responsibility and cause marketing partnerships, where she focused on business development and client account management. more >>>

 

 

 

 

security services

“Our principals earned their reputations through direct operational responsibility and demonstrating successful results. By applying that same dedicated ‘hands on’ approach, we are now helping our clients achieve their objectives.”

Michael Chertoff