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Industry Knowledge, Benchmark Professionalism and an Ethical Approach


Dan JohnsonS. Daniel Johnson

Executive Vice President, General Dynamics Information Systems and Technology Group
President, General Dynamics Information Technology

Dan Johnson has served as executive vice president of the General Dynamics Information Systems and Technology Group since 2015. This group consists of two business units: Information Technology and Mission Systems. Together, they include over 40,000 professionals and provide products, systems and services to government and commercial customers.

Mr. Johnson also serves as president of General Dynamics Information Technology. Since 2008, he has led over 25,000 professionals providing information technology, systems engineering, training and cyber security services to a variety of defense, intelligence, health, federal agency and commercial customers.

Mr. Johnson was the chief operating officer of Anteon Corp. from 2003 to 2006 when Anteon was acquired by General Dynamics. Anteon was a 9,000-person organization providing system integration and engineering services to federal customers.

Prior experience includes 28 years in positions of increasing responsibility with the consulting units of KPMG and BearingPoint.

A graduate of the U.S. Naval Academy and George Washington University, Mr. Johnson served on active duty from 1969-1975. He was 2011 Executive of the Year (Government Computer News), sits on the American Diabetes Association Research Foundation board and is active in the Leukemia & Lymphoma Society.

Amy Gilliland

Amy Gilliland

Senior Vice President and Deputy for Operations

Amy Gilliland became senior vice president and deputy for operations at General Dynamics Information Technology on April 1, 2017. Ms. Gilliland supports the company in all aspects of business operations. General Dynamics IT provides information technology solutions and professional services to a variety of government and commercial customers, including defense, intelligence, homeland security, health and civilian agencies.

Previously, Ms. Gilliland served as senior vice president of human resources and administration for General Dynamics at corporate headquarters. In February 2014, Ms. Gilliland was appointed a vice president of the corporation and served as vice president, human resources. Her responsibilities included the company’s executive compensation and ethics programs. Ms. Gilliland was chief of staff for the chief executive officer and staff vice president of strategic planning from 2013 to 2014. Prior, she was staff vice president of investor relations from 2008 to 2012, and director of strategic planning from 2005 to 2008.

Ms. Gilliland joined General Dynamics Corporation in 2005, having served in the U.S. Navy as a Surface Warfare and Public Affairs Officer. Her Navy assignments included service aboard USS LABOON (DDG 58), with the Navy’s Legislative Liaison Office to the U.S. House of Representatives, the Office of the Secretary of the Navy and the Navy Office of Information. 

Ms. Gilliland earned a bachelor’s degree with distinction from the U.S. Naval Academy, a master’s degree from Cambridge University, England and a master’s degree in business administration from Georgetown University.

Vince Antonacci

Vincent Antonacci

Vice President and General Counsel

Vincent Antonacci is responsible for managing the overall legal affairs of General Dynamics IT, including providing legal advice and guidance to the company’s business units on matters including legal support in general corporate law, government contracts, labor and employment, mergers and acquisitions and international and regulatory compliance. He oversees contracts support within the company and routinely reviews, drafts and negotiates significant commercial and international transactions. As the chief legal officer, Mr. Antonacci manages claims and litigation filed by and against General Dynamics IT and conducts internal investigations to ensure full compliance with all applicable laws, regulations and company policies and procedures.

Previously, Mr. Antonacci served as division counsel at GTE Government Systems Corporation (GTE GSC), supporting GTE Worldwide Telecommunication Systems until GTE Government Systems Corporation was acquired by General Dynamics in 1999. Upon the acquisition, he was appointed vice president and general counsel for General Dynamics Network Systems. Prior, Mr. Antonacci served as senior attorney for MCI Communications Corp. in Washington, D.C. and was responsible for legal oversight of the MCI Government Markets group.

Mr. Antonacci received his undergraduate bachelor’s degree in accounting from the University of Notre Dame, graduating cum laude. He received his J.D. degree from Syracuse University College of Law, graduating magna cum laude. Following law school, he fulfilled his Army ROTC obligation in the Army JAG Corps Honors Program as counsel for procurement and assistant chief trial attorney in the D.C. Office of the Chief Counsel, HQ, U.S. Army Corps of Engineers.

Dave BreenDavid Breen

Vice President, Human Resources

As vice president, human resources David Breen has led numerous post acquisition integrations of human capital functions and systems since joining the company in 2004.

Previously, Mr. Breen served as vice president for human resources at General Dynamics United Kingdom, Ltd., following six years in leadership roles at General Dynamics Headquarters, first as human resources manager, followed by director of compensation. There, he played a key role in the design, development and administration of incentive and equity compensation plans. Prior, Mr. Breen first joined General Dynamics in 1985 at Electric Boat, where he participated in a broad spectrum of human resources initiatives.

Mr. Breen received his bachelor’s degree in industrial and labor relations from Cornell University and master’s degree in business administration from Rensselaer Polytechnic Institute.

Diane Nguyen

Vice President, Finance and Chief Financial Officer

Diane Nguyen leads General Dynamics Information Technology’s financial, facilities, security and procurement operations.

Ms. Nguyen has more than 25 years of financial and accounting expertise as a strategic business partner and as a member of management and of management and executive teams, responsible for collaboration on business issues and to maximize shareholder value. Prior to her position as CFO of General Dynamics IT, Ms. Nguyen served as Director, Financial Planning & Analysis for General Dynamics Corp. and as Staff Vice President, Financial Planning & Analysis at General Dynamics IT.

Previously, Diane served as Director of Program Finance/Controller for Integrated Combat Systems. She was also Director of Finance Integration and Acquisitions for General Dynamics Advanced Information Systems. Prior, she served as Chief Financial Officer for Veridian Information Solutions, Inc. and Controller at MRJ Technology Solutions.

A Certified Public Accountant, Ms. Nguyen holds degrees in Accounting from Pennsylvania State University, a certificate from the Mergers and Acquisitions program at the University of Pennsylvania’s Wharton School of Business and an MBA in Finance from George Washington University’s accelerated program.

Kristie GrinnellKristie Grinnell

Vice President, Information Technology and Chief Information Officer

Kristie Grinnell leads the company’s Information Technology strategic plan in areas of enterprise, business application, data centers, wide-area networks and customer service. Ms. Grinnell brings more than 15 years of senior leadership in the professional and IT service industries. Prior to joining General Dynamics IT, she served as both director of planning and governance and director of client delivery enablement at CSC. There, she oversaw execution of the company’s IT plan and implementation of its client and knowledge management strategy.

Prior to joining CSC, Ms. Grinnell worked as chief of staff, CIO and as global IT strategy executive at PricewaterhouseCoopers. During that time, she led the company’s IT transformation, aligning its business strategy that encompassed development of line of service IT portfolios, organizational change management, governance and processes.

Ms. Grinnell received her bachelor’s degree in mechanical engineering from the University of Pittsburgh and master’s degree in business administration from Cornell University’s Johnson Graduate School of Management.

Mark MeudtMark Meudt

Vice President, Marketing & Communications

As vice president, Mark Meudt oversees marketing, public relations and internal communications for General Dynamics IT.

Mr. Meudt has more than 25 years of marketing, communications and business development experience in the U.S. defense, federal, state and government contractor marketplace.

Prior to joining General Dynamics, Mr. Meudt directed marketing and public relations for the IT, engineering and services sectors of top-tier defense, aerospace and telecommunications firms, including Lockheed Martin, Northrop Grumman and Alcatel. Prior, he managed business development and operations at Weber Shandwick, an international advertising and public relations agency.

Mr. Meudt received his bachelor’s degree in journalism from the University of Maryland and master’s degree from American University. He is also a graduate of the Darden School Business Executive Development Program in financial management at the University of Virginia. He is an award-winning journalist and a published author. Mr. Meudt serves on the USO Metropolitan Washington-Baltimore board of directors and is active with the Richmond Justice Initiative.

Ray WhiteheadRay Whitehead

Vice President, Business Development and Strategic Planning

As senior executive and vice president, Ray Whitehead oversees management of business development operations, marketing and communications, technology strategy and assessment, strategic planning and business growth through mergers and acquisitions.

Previously, he served as vice president of business development and communications for General Dynamics Network Systems, which was combined in 2006 with Anteon International to form General Dynamics Information Technology. In that capacity, he led the development of automated sales support systems, managed public affairs and communications, and developed strategies that led to the acquisition of four IT services companies.

Prior to joining General Dynamics, Mr. Whitehead completed a career as an armor officer in the U.S. Army, serving in a variety of operational and public affairs positions worldwide. He led armor units based in Germany, South Korea and the continental United States. He was the editor-in-chief of Soldiers Magazine, the Army’s monthly feature magazine distributed to more than one million readers. He also served as an Army spokesperson at the Pentagon, where he provided communications support and media relations for operations in Haiti, Rwanda, Kuwait and Bosnia. A participant in the Army’s Training with Industry Program, he worked with The Reader’s Digest Association where he gained extensive marketing experience prior to leading Army Recruiting’s direct marketing program.

Mr. Whitehead received his bachelor’s degree in history from The University of Tennessee and master’s degree in business from Webster University.

Marcus CollierMarcus J. Collier

Senior Vice President, Health and Civilian Solutions Division

With 30 years in professional services in the federal IT market, Marcus Collier serves as senior vice president of the Health and Civilian Solutions Division of General Dynamics Information Technology. Delivering a lifecycle of IT services across the enterprise, the division provides infrastructure modernization, managed services support throughout the civilian marketplace along with software engineering, portal development and maintenance, data center consolidation and cloud computing services to an expanding customer base.

Prior to joining General Dynamics, Mr. Collier worked in senior management at Litton PRC, helping expand its presence into NAVSEA and support numerous shipbuilding programs, secure training and IT contracts with the U.S. Navy, U.S. Coast Guard, the Department of Homeland Security and the U.S. Army Reserves.

Mr. Collier received his bachelor’s degree in naval architecture and marine engineering from the University of Michigan and an international finance master’s degree from George Washington University.

Bernie GuerryBernie Guerry

Senior Vice President, Intelligence Solutions Division

As senior vice president of the Intelligence Solutions Division, Bernie Guerry leads a global enterprise with over 5,000 highly cleared engineers, IT professionals, and technology and domain specialists. The division provides enterprise solutions and services including cloud solutions, virtual desktop environments, big data analytics, network engineering, secure environment mobile device management, professional services, cyber security solutions, operational tools and best practices in computer network defense and exploitation.

Mr. Guerry has more than 25 years of experience leading large, complex organizations and previously served as vice president, general manager of General Dynamics IT’s National Intelligence Sector, where he provided IT solutions and mission support to the U.S. National Intelligence market and internal security, information systems, training and development operations management.

Prior to joining General Dynamics in 2006, Mr. Guerry served as senior procurement executive for the CIA, overseeing its multibillion dollar contracting and acquisition program, major systems procurement, services, research and development, and new technologies. Previously he led organizations at the NRO and the NGA and served on the Federal Acquisition Council of the Office of Management and Budget (a subset of the President’s Management Council) and on the Intelligence Community Acquisition Council.

Mr. Guerry received his bachelor’s degree in business and master’s degree in business management from the Citadel and is a distinguished graduate of the Air War College. He is a graduate of the Intelligence Community Intelligence Fellows program and has completed executive programs at the Kellogg Business School at Northwestern University and at Harvard Business School. He began his career as an active duty U.S. Air Force officer and received extensive acquisitions training at the Air Force Institute of Technology, Wright Patterson Air Force Base.

Currently, Mr. Guerry sits on the Board of Advisors for the Intelligence and National Security Alliance (INSA) and is a member of both AFCEA International and the United States Geospatial Intelligence Foundation. He received the Distinguished Career Intelligence Medal in 2006.

Al WhitmoreAlphonse R. Whitmore

Senior Vice President, Global Solutions Division

As senior vice president of General Dynamics IT’s Global Solutions Division, Al Whitmore leads more than 7,000 employees across the organization, which has successfully expanded and delivered exceptional skills, service and capabilities to a broad customer base including all Department of Defense services, Customs and Border Protection, the Federal Aviation Administration, Los Angeles World Airport, the state of Texas, all major U.S. wireless service providers and many others.

Mr. Whitmore joined General Dynamics through its acquisition of GTE Government Systems in 1999. Prior to his current position, Mr. Whitmore served as senior vice president and general manager of the company’s Navy and Air Force Systems Division. Previously, he served as vice president and general manager of General Dynamics Interactive and as vice president of business development and international acquisition for General Dynamics Communication Systems.

He received his bachelor’s degree in electrical engineering from Brown University and master’s degree in business administration from Northeastern University. He currently sits on the board for the  Armed Forces Communications and Electronics Association’s Washington D.C. Chapter (AFCEA DC).