Michael Sheehan, CEO

President and Chief Executive Officer

Michael Sheehan

Michael (Mike) Sheehan is President and Chief Executive Officer of Thales Defense & Security, Inc., and has over 35 years of industry experience.

Prior to working for Thales Defense & Security, Inc., Mr. Sheehan worked at Cobham, where he was responsible for the operation and management of the company’s avionics strategic business area. Prior to Cobham, Mr. Sheehan spent 24 years working for BAE Systems, Northrop Grumman, and DRS Technologies in various senior management level engineering, program management, business development, and general management positions.

Mr. Sheehan earned a Bachelor’s Degree in Electrical Engineering from Lehigh University, a Master’s Degree in Electrical Engineering from Drexel University, and a Master’s Degree in Business Administration from Columbia University.


Vice President and Chief Financial Officer

Brian Miller

Brian Miller is Vice President and Chief Financial Officer for Thales Defense & Security, Inc. He is responsible for all aspects of Thales’ finance and accounting operations, leads the Quality organization, and serves as the company’s Compliance Officer and Management Quality Representative.

He joined Thales Defense & Security, Inc. as Director of Finance in 2010, and was named Vice President and Chief Financial Officer in 2015. Mr. Miller came to Thales from DRS Technologies where he worked for five years in finance/business operations management at DRS Signal Solutions. He began his career as part of the Financial Leadership Development program at Lockheed Martin, and spent seven years at the business area and headquarters levels performing a variety of roles.

Mr. Miller earned a Bachelor’s Degree of Business Administration in Finance and Economics from the University of Notre Dame.

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President, Tampa Microwave

Aaron Brosnan

Aaron Brosnan is President of Tampa Microwave, a Thales company. He is responsible for all day-to-day business operations, customer commitments, strategic business direction and growth.

Prior to joining Tampa Microwave, Mr. Brosnan worked at Thales Defense and Security, Inc. (Thales) for 15 years, where he served as Vice President of the Communication Systems business unit. In that role, Mr. Brosnan was responsible for all Tactical and Satellite Communications and Electronic Warfare business with the U.S. DoD and export markets. He also performed as Thales’ Vice President of Business Development, where he was responsible for leading new business initiatives in the areas of tactical and satellite communications systems, electronic warfare solutions, ground tactical vehicular and command post communications systems, and power and accessories solutions. Furthermore, Mr. Brosnan held senior
management roles, both in engineering and business development, with Sanmina-SCI in Huntsville, Alabama, and at Raytheon Systems in both Fort Wayne, Indiana and Crawley, United Kingdom.

Mr. Brosnan is a veteran of the U.S. Navy, where he was a naval flight officer. He graduated,with honors, from the U.S. Naval Academy with a Bachelor of Science degree in Ocean Engineering. He went on to receive a Masters of Engineering Management from The George Washington University. Mr. Brosnan’s awards include the Navy Commendation Medal, Navy Achievement Medal, National Defense Service Medal, and Armed Forces Expeditionary Medal.

Bob Atac

Vice President and Chief Technology Officer

Robert (Bob) Atac

Robert (Bob) Atac is Vice President & Chief Technology Officer for Thales Defense & Security, Inc., Bob will focus on technology-based solutions derived from the various parts of Thales and from within Thales Defense & Security, Inc.

Prior to his work at Thales and Visionix, Mr. Atac was the founder and President of Flight Visions, Inc. Flight Visions began as a head-up display (HUD) provider in 1986 and grew to provide full cockpit suites, including multi-function displays, controls, radios, and more. Flight Visions was purchased by CMC Electronics in 2002, and Mr. Atac was Vice President of Military Aviation before leaving in late 2004. Leveraging his extensive engineering background, Mr. Atac has written many technical publications and has been awarded a number of patents.

He earned a Bachelor’s Degree in Computer Engineering, and a Master’s Degree in Electrical Engineering from the University of Illinois at Urbana-Champaign.

Gary Kidwell

Vice President, Communication Systems

Gary Kidwell

Gary Kidwell is Vice President of the Communication Systems business unit for Thales Defense & Security, Inc. (TDSI). In this role, Mr. Kidwell is responsible for all Tactical, Satellite Communications, and Electronic Warfare business within the US DoD and export markets.

Mr. Kidwell also held key business development and account management positions within Thales, most recently as the Director of Business Development for US DoD Programs. In this role, he developed solid growth strategies and led disciplined opportunity pursuits that resulted in consecutive strategic awards totaling over $100M annually, including contracts for the Army Leader Radio Program of Record and the Security Force Assistance Brigade (SFAB).

Before joining Thales, Mr. Kidwell held senior business development roles with SCI Technology, Inc. in Huntsville, Alabama and RJ Corman Derailment Services in Nicholasville, Kentucky, in addition to working for DynCorp International in Kabul, Afghanistan providing protective security for international diplomats.

Mr. Kidwell is a recently retired and highly decorated member of the United States Marine Corps (USMC), where he served in both an active and reserve duty for over 23 years and achieved the rank of Master Gunnery Sergeant. Mr. Kidwell graduated from Columbia Southern University in Orange Beach, Alabama with a Bachelor of Science degree in Business Administration.

Chris Beauparlant

Vice President, Sensors & Missile Systems

Chris Beauparlant

Chris Beauparlant is Vice President of the Sensors and Missile Systems (SMS) business unit for Thales Defense & Security, Inc. He leads all business and operations for SMS, which specializes in optronics and sensors, observation and target location, and seekers and fuzes for air and ground applications.

His career began in regional sales with WCJ Associates, where he sold high power RF products for radar applications, and heat pipe and heat sinks. Mr. Beauparlant joined Thompson Components Corporation in 1996, where he managed the Angenieux commercial zoom lens business in the US, and successfully established distribution channels and a country-wide service network. He continued as Director of Business Development for Thales Components Corporation, before advancing to the position of Vice President for the Optronics business line in the Land Defense Division of Thales Components Corporation. He later served as Chief Executive Officer of Thales Components Corporation.

Mr. Beauparlant earned a Bachelor’s Degree in Business Administration from the University of New Hampshire’s Whittemore School of Business and Economics.

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Vice President,
System Solutions

Rob Sainsbury

Rob Sainsbury is Vice President of the System Solutions business unit for Thales Defense & Security, Inc. In this role, Mr. Sainsbury leads a diverse portfolio of businesses and products, including radars, sonars, ship combat management systems, helmet mounted displays, cyber security, and training and simulation.

Prior to joining Thales Defense & Security, Inc., Mr. Sainsbury worked for 11 years at DRS Technologies, most recently as Vice President of Business Operations and Strategy for the Maritime and Combat Support Systems group. Early in his career, Mr. Sainsbury served eight years of active duty as a US Navy submarine officer (USS Trepang, SSN674), and thereafter, put his technical and leadership skills to work for a variety of defense and technology companies, including General Electric, Martin Marietta, Lockheed Martin, and Raytheon.

Mr. Sainsbury earned a Bachelor’s Degree in Mechanical Engineering from the University of Rhode Island and a Master’s degree in the Management of Technology [a joint program in engineering (The School of Engineering and Applied Sciences) and business (The Wharton School)] from the University of Pennsylvania.

Jim Geraghty

Vice President, Visionix

James D. Geraghty

Jim Geraghty is Vice President and General Manager of the Visionix business unit for Thales Defense & Security, Inc. (TDSI). In this role, Mr. Geraghty will lead all business and operations for Visionix, which specializes in world-leading head and helmet mounted cueing systems for military applications, and state-of-the-art motion tracking solutions sold under the brand name InterSense.

Mr. Geraghty joined TDSI in May 2007 as Director of Business Development for Visionix. Over the past 25 years, he held leadership positions at BAE Systems and Litton Industries, and he served 7 years as a United States Air Force (USAF) officer within the USAF Systems Command. While at BAE Systems, Mr. Geraghty served as the Senior Director of the Networked Communications product line and as the Senior Director of Business Development and Mission Applications for BAE’s Communications & Networked Systems business unit. He has considerable experience in the capture and successful execution of major development and production programs in next-gen avionics and communication systems across the US DoD and international landscapes.

Mr. Geraghty holds a Master’s of Business Administration degree from Boston University and a Bachelor of Science degree from the United States Air Force Academy.

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Vice President of Contracts, and Trade & Legal Compliance

Glen Parker

Glen Parker is Vice President of Program Management, Legal, Contracts and Trade Compliance for Thales Defense & Security, Inc. He is responsible for the organization’s performance on existing programs, and leading the company’s legal, contracts, and trade compliance divisions.

With more than 30 years of experience in the radio communications and defense acquisition industry, Mr. Parker began his career providing systems engineering and acquisition management support to the US Air Force/ESC for security systems and communications equipment development and procurement.

Mr. Parker earned a Bachelor’s Degree in Electrical Engineering from Tufts University.

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Vice President, Engineering

Doug Bishop

Doug Bishop is Vice President and Chief Technical Officer for Thales Defense & Security, Inc. In this position, he is responsible for all product design and development activities, including strategic and technical leadership of systems, RF/analog hardware, digital hardware, embedded software, digital signal processing, and mechanical engineering disciplines, as well as information technology.

He joined Thales (then Racal Communications, Inc.) in 1989 and has served the company in a number of increasingly responsible executive positions to include Director of Engineering (1995 to 1998), Vice President of Engineering (1998 to 2006), and most recently, Vice President & Chief Technical Officer, Engineering and Information Technology.

Mr. Bishop currently serves as an officer on the company’s Board of Directors, and is a member of the University of Maryland Electrical and Computer Engineering Department Advisory Board, the Armed Forces Communications and Electronics Association (AFCEA), and Institute of Electrical and Electronic Engineers (IEEE). He earned a bachelor’s degree in electrical engineering (BSEE) from the University of Maryland.


Vice President of Human Resources and Ethics Officer

Stacey Bostock

Stacey Bostock is Vice President of Human Resources for Thales Defense & Security, Inc. In this role, Ms. Bostock oversees compensation strategies and initiatives, employee rewards and recognition, internal communications, professional development, and employee engagement. She also serves as the company’s Ethics Officer, in charge of the Ethics and Compliance programs.

Prior to this role, Ms. Bostock was the Director/Manager of Human Resources, and before that was the Senior Staff Accountant at Thales. Early on, Ms. Bostock worked as a Finance Contracts Manager for Thompson Reuters, and as the Assistant Controller and Corporate Benefits Plan Administrator for Marriott International, Inc.

She earned a Bachelor’s Degree in Organizational Management at Columbia Union College.

GaryWilliams-HS - White

Vice President, Manufacturing and Operations

Gary Williams

Gary Williams is the Vice President of Manufacturing and Operations for Thales Defense & Security, Inc. Mr. Williams joined Thales Defense & Security, Inc. 25 years ago as a Diagnostic Technician, and worked his way up performing various management positions. In his current role, Mr. Williams oversees all materials, manufacturing, concurrent and test engineering, and shipping activities at Thales’ manufacturing facility, which produces state-of-the-art tactical communications equipment, helmet mounted display units, satellite terminals, and air traffic management equipment.

Mr. Williams earned a Bachelor’s Degree in Business Administration from the University of Maryland.

Lloyd Mitchell

President, Thales Trusted Cyber Technologies

Lloyd Mitchell

Lloyd Mitchell is Thales Trusted Cyber Technologies’ (TCT) President. As President, Lloyd is focused on expanding Thales TCT’s portfolio of data security products, creating an innovative work environment, and establishing Thales TCT as a leader in the U.S. Federal market for providing high quality products and world class customer support.

Lloyd has been with Thales TCT since its inception in January 2015. Previously, Lloyd served as Thales TCT’s Vice President of Technology. In this position, Lloyd lead Thales TCT’s engineering and innovation teams in developing and enhancing new and existing cyber security solutions for the U.S. Federal market.

Lloyd has spent over 20 years with SafeNet, Inc. (Thales TCT’s predecessor) most recently serving as a Chief Architect. During his tenure with the company, he has grown a deep practical experience in data and network security through building products that secure corporate and national interest.