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Summary of Past Experience

Dr. Stewart has over 40 years of experience performing across the spectrum of research direction, line management, program management, system engineering, engineering education, flight operations, and research and development. He has had extensive involvement at all levels as Technical Director, Principal Investigator, Operations Manager, Director of Research, Program Manager, Associate Professor, Chief Scientist, Systems Analyst, Member of the Technical Staff, and Aircrew Member.

Employment History


University College London - Visiting Professor, Department of Electronic and Electrical Engineering


Independent Engineering Management Consultant

Current activities include:

  • Lead on EU SpeechXRays biometrics grant at UCL, 2015-18
  • Co-PI with Hugh Griffiths; Radar Vectors Workshop at UCL
  • Consultant to US Defense Advanced Research Projects Agency (DARPA) in the area of international science and technology (S&T) engagement
  • Consultant to US National Science Foundation (NSF) providing support to international S&T study tours/analyses
  • Consultant to Johns Hopkins University Applied Physics Lab (JHU APL) for international engagement and collaboration
  • Consultant to ATIP for international engagement and collaboration
  • Consultant to Intellectual Ventures
  • Consultant to UK Home Office on system engineering
  • Consultant to US University of Maryland, Physical Sciences Lab providing support to international S&T studies and analyses
  • Lecturer at Cranfield Defence Academy
  • Member of NATO S&T panels SET-207 Passive Bistatic Radar and SET-227 Cognitive Radar
  • Active teaching short courses in C4ISR, Electronic Warfare, and Cyber Security

Previous experience

2007 to October 2013

US Office of Naval Research (ONR) Global - Technical Director

Dr. Stewart was the Technical Director (TD) of ONR Global, a SES level position, based in London, UK. In this capacity he was responsible for providing technical direction to a staff of 50 globally deployed, senior engineers and scientists involved in monitoring, assessing, and sponsoring world-wide S&T development of interest to the US Navy. In this capacity, he established the research agenda and approved over $10 million (US) annually in grants for fundamental research to universities and research institutes around the world. Total budget he managed was over $30 million (US) annually. The research program was extremely broad in scope, ranging from metamaterials to semantic web and has touched 70 countries during his tenure. He has been very active in organizing and participating in international conferences and workshops.

2005 to 2007

Science Applications International Corporation (SAIC) - Vice President and Director of Business Development

Dr. Stewart managed the strategic business development function for the $500 million annual revenue Technology Research and Integration Business Unit that is focused on R&D. He was responsible for relations with major new and ongoing clients and managed the proposal development function. Primary customers included ONR, Defense Advanced Research Projects Agency (DARPA), National Reconnaissance Office (NRO), Air Force Research Laboratory (AFRL), Naval Air Systems Command (NAVAIR), National Geospatial-Intelligence Agency (NGA), and Army Topographic Engineering Center (TEC). Dr. Stewart worked directly with Congressional members and staff on direct program funding.

1994 to 2005 

Science Applications International Corporation - Corporate Vice President and Manager, Reconnaissance and Surveillance Operation 

Dr. Stewart developed from scratch, managed, and had profit and loss responsibility for a $150 million operation of 500 technical and administrative staff with major locations in the US at Arlington, Virginia; Tucson, Arizona; Saint Petersburg, Florida; Chantilly, Virginia; Sterling, Virginia; Ann Arbor, Michigan; Patuxent River, Maryland; and Lihue, Hawaii. He personally was responsible for starting most of those offices. In addition, he had a small operating location in Cambridge, UK. He worked closely with DARPA, Federal Bureau of Investigation (FBI), NGA, ONR, NRO, AFRL, NAVAIR, Air Force Office of Scientific Research (AFOSR), and Army Night Vision and Electronic Systems Directorate (NVESD) in the advanced unmanned aerial vehicle (UAV), communications system, advanced sensor system, sensor signal/image exploitation, biometrics, and advanced information technology areas. He was Chairman of DARPA Sensor Technology Office (STO) High Performance Embedded Processor Study, a member of the DARPA Tier II Plus/Global Hawk UAV Concept Development Team, Chairman of the DARPA Semi-Automated Imagery Intelligence (IMINT) Processor Red Team, and a member of the DARPA Synthetic Aperture Radar (SAR) ECCM Study. He had a contract with Taiwan to develop a UAV mission planning system.

1990 to 1994

George Mason University (GMU) - Associate Professor, Department of Electrical & Computer Engineering (ECE)

Dr. Stewart was a faculty member in the School of Information Technology & Engineering at George Mason University. He was Principal Investigator (PI) on over $5 million worth of grants and contracts, including image processing/analysis and automatic sensor interpretation related projects from DARPA, Air Force Rome Lab, Australian Defence Science and Technology Organisation, and Army Intelligence and Electronic Warfare Directorate.

He was Associate Director to Dr. Harry Van Trees, Center of Excellence in Command, Control, Communications, and Intelligence (C3I), and Technical Coordinator for the Sensing and Fusion Program at the Center. He taught graduate courses in statistical signal processing, pattern recognition, radar systems, antennas and propagation, and communications theory.

He was a consultant for DARPA, Strategic Defense Initiative Office (SDIO), Institute for Defense Analyses (IDA), SAIC, Army Research Office (ARO), among others on signal/image processing, automatic target recognition (ATR), radar systems, sensor/data fusion, and avionics systems. As a member of the DARPA WarBreaker Surveillance and Targeting Tiger Team, Dr. Stewart provided technical advice and oversight on synthetic aperture radar and multispectral infrared detection and classification techniques. He established a relationship with the Russian Academy Of Science and participated in scientific exchanges.

1987 to 1990

ARCO Power Technologies, Inc. (APTI)- Manager, Advanced Systems

At this subsidiary of Atlantic-Richfield Petroleum Company (ARCO), as Program Manager of the Artificial Ionospheric Mirror Radar (Air Force Forecast II) project under joint Air Force/DARPA external sponsorship and internal ARCO sponsorship, Dr. Stewart performed research and directed efforts of 20 senior scientists and engineers involved in interdisciplinary research on high-power radar and ionospheric modification systems. The team included very strong performers in electrical engineering, plasma physics, computer science, systems engineering, and ionospheric sciences. During this period, he was an adjunct faculty member in the ECE Department at GMU teaching graduate courses in statistical signal processing and communications systems.

1983 to 1987

Sperry Corporation - Chief Scientist, Signal Processing

As PI for Signal Processing for the Sperry (later Unisys) Corporate Technology Center, Dr. Stewart conceived and developed a corporate-wide research program in signal and information processing ($2 million/year). As Chief Scientist of the Strategic Defense Initiative group, he performed research, including multi-sensor (millimeter wave radar, long wave infrared, laser) classification, discrimination, tracking, intercept, and kill assessment for exo-atmospheric targets.

1982 to 1983

Air Force Studies & Analyses - Deputy Chief, Tactical Systems Division

Working on the Air Staff in the Pentagon, Dr. Stewart performed analyses and directed the efforts of 17 analysts and engineers in studies involving reconnaissance, electronic warfare (EW), and C3I systems. He performed technical studies that impacted major programs involving the Joint Surveillance Targeting and Reconnaissance System (JSTARS), UAV programs, EW, anti-jam communications systems (spread spectrum and frequency hopping), identification friend/foe (IFF) and ATR, F-22 Advanced Tactical Fighter, Airborne Warning and Control (AWACS), and U-2 manned reconnaissance system. During this period, he was an adjunct faculty member in the ECE Department at George Washington University teaching undergraduate courses in communications systems.

1978 to 1982

US Air Force Academy - Associate Professor of Electrical Engineering

Dr. Stewart developed and taught undergraduate courses in electronic circuits, digital electronics, linear systems, communications systems, radar, electronic warfare, probability and statistics, and electromagnetics. As Deputy Department Head of Electrical Engineering, he managed the department budget, the faculty/staff of 40, and other resources.

As Director of Faculty Research and Continuing Education (1981-82), he managed an interdisciplinary 45 man-year annual program. He was Principal Investigator, Department of Electrical Engineering (1978-81), on research programs involving digital signal processing and target electromagnetic modeling. He also participated in NATO Advanced Group for Aerospace Research and Development (AGARD).

1977 to 1978

Air Force Avionics Lab - Principal Research Engineer

Dr. Stewart performed research on the application of statistical pattern recognition/signal processing techniques to high-resolution radar signatures and developed the first algorithm that reliably discriminated tracked from wheeled vehicular micro-doppler radar signatures.

1964 to 1974

US Air Force - Electronic Warfare Officer/Engineer

Flew the EB-57, EB-66, and MC-130E aircraft, including a combat tour in Southeast Asia (1966-67) flying electronic intelligence (ELINT), electronic support measures (ESM), and electronic countermeasures (ECM) missions in the EB-66C. He was the flight test engineer on several pieces of EW equipment and the officer-in-charge of the electronic intelligence processing group.


PhD, Electrical Engineering, Air Force Institute of Technology, 1978

MS, Electrical Engineering (with distinction), Air Force Institute of Technology, 1975; Mervin E. Gross Award for Academic Excellence (Top graduate student out of 400)

BS, Engineering Science (with distinction), University of Redlands, 1973


Honorary BSEET, Colorado Technical College, 1982; Jane’s Who’s Who in Aviation & Aerospace, 1982; Mervin E. Gross Award for outstanding scholarship, 1975; Who’s Who in American Colleges & Universities, 1975; Distinguished Flying Cross, 1967.

International R & D Interactions


  • As TD for ONR Global (2007-12), participated in numerous international conferences including ones in UK, France, Germany, Sweden, Italy, Switzerland, Spain, Ukraine, Czech Republic, Hungary, Croatia, Turkey, Egypt, Bahrain, India, Chile, Brazil, Singapore, Japan, Korea, Vietnam, Thailand, and China
  • RUSI C4ISTAR Conference (Malvern, UK), 2002 and 2000
  • International Radar Conference (Brighton, UK), 1994 and (London, UK), 1990
  • European Synthetic Aperture Radar (EUSAR) Conference (Friedrichshafen, Germany) 1993
  • Signal Processing Conference (Gold Coast, Australia) 1992
  • NATO AGARD Conference on Statistics and Neural Networks (Les Arcs, France) 1992
  • German-Russian Pattern Recognition Conference (St Petersburg, Russia) 1991 and (Erlangen, Germany) 1992
  • Scandinavian Image Processing Conference (Aalborg, Denmark) 1991
  • NATO AGARD Conference on Electromagnetic Ramifications of Composite Airframes (Lisbon, Portugal) 1981

Visits to Research Institutes

  • As TD for ONR Global (2007-13), visited numerous international institutes in UK, Singapore, Ukraine, Japan, India, Sweden, France, Belgium, and Korea
  • Chung Shan Institute of Science and Technology (Taipei, Taiwan) 2002 and 1999
  • Defense Science and Technology Organization (DSTO) (Salisbury, Australia) 2001 and 1992
  • CCSIP (Adelaide, Australia) 2001
  • FOA (Stockholm, Sweden) 2000 and 1996
  • DERA (Malvern, UK) 1999
  • Singapore MoD 1995
  • University of Paris 1992
  • University of Adelaide (Adelaide, Australia) 1992
  • Russian Academy of Science (Moscow and St Petersburg, Russia) 1991

Academic Activities

  • Member of the Naval Postgraduate School International Programs Steering Group 2011-2013
  • Reader for doctoral dissertation at University of Adelaide 1996
  • Sponsor for visiting professor from the Russian Academy of Science, 1993-94
  • Research advisor for two doctoral students in Electrical Engineering from the Australian DSTO, 1992-94

Industrial and Contracts

  • Line manager for SAIC UK office in Cambridge involved in MoD R&D 2002-05
  • R&D contract with Taiwan Chung Shan Institute of Science and Technology for UAV Mission Planning System 2001-04
  • R&D contract for Sensing and Fusion with Australian DSTO 1992-94


  • Institute of Electrical and Electronics Engineers (IEEE) (Sr. Member)
  • Sigma Xi
  • Eta Kappa Nu
  • Tau Beta Pi
  • Association of Old Crows
  • Armed Forces Communications Electronics Association (AFCEA)
  • Air Force Association
  • Kauai Economic Development Board
  • Maui Economic Development Board
  • National Defense Industrial Association
  • RUSI

Professional service


1991–2003: Member of Editorial Board, Pattern Recognition and Image Analysis (Russian Publication)

1992–1998: Reviewer, IEEE Transactions on Systems, Man, and Cybernetics

1993: Reviewer, Pattern Recognition

1993: Reviewer, Automatica


Currently: Associate Chairman IEEE Biometrics Standards Committee.

2015: International Participation Co-Chair for the 2015 Institution of Electrical and Electronics Engineers (IEEE) International Radar Conference. Crystal City, Virginia. 11-15 May 2015.

2012: Sponsor for 9th IEEE-RIVF International Conference on Computing and Communications Technologies, Ho Chi Minh City University of Technology, Ho Chi Minh City, Vietnam

2001: Papers Selection committee and Session Chairman 2001 IEEE Radar Conference.

1999-2000: Program Chairman of RADAR 2000.

1994: Member of Paper Selection Committee, IEEE Radar 95.

1993: Organizer & Chairman, Sensor Fusion Session, IEEE Asilomar Circuits, Systems, & Computers Conference.

1983: Chairman, Region V Conference.

1982: Member, IEEE Continuing Education Committee. Chairman, Aerospace Electronic Systems Society Educational Activities Committee.

1978-80: Treasurer, Vice Chairman, Chairman, Pikes Peak Section (Colorado Springs, Colorado)

American Society of Engineering Education (ASEE)

1982: Director ASEE Section Effective Teaching Institute, Colorado Springs, Colorado.

Accreditation Board for Engineering and Technology (ABET)

1988-92: Engineering Accreditation Commission Visitor (ABET) for Electrical Engineering & System Engineering (6 visits).

Society of Photo Optical Instrumentation Engineers (SPIE)

1995: Chairman and Organizer, Automatic Target Recognition Session, OE/Aerospace Sensing ‘95.

1994: Chairman, Image Processing I Session, OE/Aerospace Sensing ‘94.

Department of Defense (DoD)

2011: Member of the ONR Future Naval Capabilities Review Team.

2011: Table Chair at “The Future of Make,” DARPA Advanced Manufacturing Initiative, Singapore; Member of the ONR Future Naval Capabilities proposal evaluation team.

1994: Chairman, DARPA STO Signal Processor Panel.

1994: Chairman, Signal and Image Processing Session of the Army Science Conference. Member of the SAR Panel of the DARPA Tier 2 Plus High Altitude Long Endurance (Global Hawk) Wide Area Surveillance System Requirements Committee.

1993: Chairman & Organizer, DARPA WarBreaker Signal & Information Processing Workshop. Chairman & Organizer, Army Research Office (ARO)-sponsored Information Fusion Workshop. Member, Basic Research review of Army Research Lab and Intelligence Electronic Warfare Directorate at request of ARO. Proposal Evaluator, ARO.

1992: Organizer and Chairman, DARPA Advanced ATR Workshop (Jan.) & Automatic Sensor Interpretation (Oct.); Member of ARO Advisory Panel for Strategic Planning. Chairman, AF Wright Lab Advisory Group on Automatic Radar Target Identification. Member of DARPA WarBreaker Surveillance and Targeting Tiger Team.

1990: Technical Program Chair of DISA/GMU C3I Center Conference on Corporate Information Management, May 23, George Mason University.

1981: Chairman, Combat Identification Systems Conference.

1980: Vice Chairman, Non-Cooperative Target Recognition Conference.

1977-81: Member Non-Cooperative Target Recognition Working Group.

Department of Energy (DoE)

1993: Proposal Evaluator for the DoE Small Business Innovative Research Program.

National Aeronautics and Space Agency (NASA)

1990: Proposal Evaluator for the NASA Advanced Communications Technology Satellite (ACTS) Program.


2017: Co-Chairman of the Vectors in Radar Research Conference, University College London, 7-8 November, 2017.

2010: Co-Chairman of Fourth Indo-US Science and Technology Round Table Meeting, Indian Institute of Science, Bangalore, India; Judge for Student Autonomous Underwater Challenge-Europe (SAUC-E), NATO Undersea Research Center, La Spezia, Italy.

2001-5: Member of Board of Directors of the Kauai Economic Development Board.

1994-2003: Member of the Technical Advisory Board, Maui High Performance Computing Center.

1993: Chairman of Pattern Recognition I Session at Third Open Joint German Russian Conference on Image Interpretation and Pattern Recognition, Bavarian Research Center for Knowledge-Based Systems, Erlangen, Germany, March 22-24.

1992: Chairman of Theory and Principles session at The Third International Symposium on Signal Processing and Its Applications, The Institution of Radio and Electronics Engineers Australia, Gold Coast, Australia, August 16-21.

1990: Chairman of Ada in C4I technical session at AFCEA Military/Government Computing Conference and Exposition, Arlington, Virginia, February 5-7.

1984-85: Member, Industrial Advisory Committee for GMU on Ph.D. in Information Technology.

1984-86: Member of Commonwealth of Virginia Center for Innovative Technology Industrial Advisory Committee.

1982: Board of Directors Colorado Springs Technology & Education Exposition.

1981-82: Board of Directors Pikes Peak Chapter of Association of Old Crows.

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Short courses

Clayton Stewart. Electronic Warfare Overview, ATI Course, July 30- August 2, 2018, Patuxent River, Maryland.

Clayton Stewart. Electronic Protection & Electronic Attack, ATI Course, May 16-18, 2017, NSWC Dahlgren, Virginia.

Clayton Stewart. Principles, Systems and Technologies for C4ISR. SMi; 4 Dec 2014, London, UK

Clayton Stewart. Tactical Communications. SMi Pre-Conference Workshop; 4 February 2015, Prague, Czech Republic.

Clayton Stewart. Tactical ISR Principles, Systems, and Technology. SMi MASTERCLASS SERIES 2015; 22 April 2015, London, UK.

Clayton Stewart. C4ISR Principles, Systems, and Technology. ATI Course D123; 2-4 June 2015, Presented at NASIC, Wright Patterson AFB, OH, USA

Clayton Stewart. EW/ELINT Receivers with Digital Signal Processing Techniques. ATI Course; 15-18 June 2015, Columbia, MD, USA

Invited lectures and seminars

Clayton Stewart. “International S&T Snapshot.” Presented to DARPA Staff. 5 February 2014.

Clayton Stewart. “Space Based Maritime Domain Awareness.” Presented at University College London. 2 May 2014.

Clayton Stewart. “Radar Research at University College London.” Nanjing Research Institute of Electronics Technology, Nanjing, China. 23 March 2015.

Clayton Stewart. Invited Lecturer at UK Cranfield Defence Academy. “Combat Electronic Warfare Operations in Southeast Asia.” January 8, 2015

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