Man working at a Computer Lab The Professor's Gate on the GWU Campus outdoor graduation ceremony at GWU soldier in uniform watching an online lesson on a tablet Informal stand-up meeting in a technology office space cherry blossoms surrounding a gazebo on the GWU Campus


Shahram Sarkani

Director, SEAS Online Programs

Shahram Sarkani, Ph.D., P.E., is a Professor of Engineering Management and Systems Engineering, and Faculty Adviser and Academic Director of SEAS Online Programs (since 2001). Professor Sarkani joined the GW faculty in 1986. His previous administrative appointments include chair of the Civil, Mechanical, and Environmental Engineering Department (1994-1997) and Interim Associate Dean for Research, School of Engineering and Applied Science (1997-2001).

In over 200 technical publications and presentations, his research in systems engineering, systems analysis, and applied enterprise systems engineering has application to risk analysis, structural safety, and reliability. He has conducted sponsored research with such organizations as NASA, NIST, NSF, U.S. AID, and the U.S. Departments of Interior, Navy, and Transportation.

Recent Awards:

  • Engineering Management Journal’s Ted Eschenbach Best EMJ Journal Paper Award, 2010 (with Merritt & Mazzuchi)
  • Inducted into the Civil and Environmental Engineering Hall of Distinction, Louisiana State University, 2010
  • Walter L. Huber Civil Engineering Research Prize, American Society of Civil Engineers, 1999

Professor Sarkani holds the Ph.D. in Civil Engineering from Rice University, and B.S. and M.S. degrees in Civil Engineering from Louisiana State University. He is a Registered Professional Engineer in Virginia.

John L. Dargan, Ph.D.

Lecturer in Engineering

John L. Dargan, Ph.D., is Director of the Operations and Requirements Analysis Division in the Department of Homeland Security (DHS) Science and Technology (S&T) Directorate. He leads operations research, modeling, systems analysis, and simulation efforts in support of the DHS Components and the Joint Task Forces. He is the S&T Principal for the DHS Joint Requirements Council, for the Headquarters Coordination Group for Resource Planning Guidance development, and for the Strategy and Policy Executive Steering Committee.

Before accepting his current position, Dr. Dargan was a career United States Air Force officer assigned to various engineering, acquisition, and staff duties that culminated with his appointment as Chief, Investment Programs Division, USAF Headquarters Congressional Budget Liaison. In that role he was the principal interface to Congressional Appropriations and Budget Committees for programs including the F-22, Joint Strike Fighter, and Next-Generation Bomber.

Dr. Dargan earned the Bachelor of Science degree in electrical engineering from Clemson University, the Master of Science in electrical engineering from the Air Force Institute of Technology, and the Ph.D. in systems engineering from George Washington University.

Recent Awards:

  • DHS Under Secretary’s Award for Science and Technology, 2016
  • DHS Under Secretary’s Award for Building Partnerships, 2014

John M. Fossaceca, Ph.D.

Professorial Lecturer in Engineering

Dr. Fossaceca currently serves as Associate Division Chief for the U.S. Army Research Laboratory’s Information Sciences Division, where he supports research programs in AI & Machine Learning for Autonomous Systems. As Executive VP of Engineering, Dr. Fossaceca managed the team responsible for the modernization of the U.S. Army’s satellite-based Blue Force tracking system while at Comtech Telecommunications and served as VP of Engineering and Principal Investigator on Small Business Innovation Research programs for the U.S. Navy at 3e Technologies where his team developed some of the first secure WiFi technology accredited by the U.S. Government. Dr. Fossaceca also was also an Engineering Director at AT&T/Lucent/Bell Labs for Next Generation Telecommunications Systems working on several products including early VoIP telephony technology.

  • Dr. Fossaceca has conducted research and development in adaptive signal processing, machine learning, communications and cybersecurity. His present research interests are in online continuous machine learning in data-constrained environments, network intrusion detection, and the internet of battlefield things. Dr. Fossaceca is co-inventor on six patents related to wireless communications and signal detection, and he serves as a reviewer for several refereed journals. He teaches graduate courses in quantitative models, software engineering, and cybersecurity, and serves as Ph.D. research advisor for several students.

Dr. Fossaceca holds bachelor’s and master’s degrees in electrical engineering from Manhattan College and Syracuse University, respectively; an M.B.A. from Virginia Tech; and a Ph.D. in systems engineering from the George Washington University.

Selected Publications:

MARK-ELM: Application of a novel Multiple Kernel Learning framework for improving the robustness of Network Intrusion Detection
JM Fossaceca, TA Mazzuchi, S Sarkani
Expert Systems with Applications 42 (8), 4062-4080

A semi-boosted nested model with sensitivity-based weighted binarization for multi-domain network intrusion detection
JW Mikhail, JM Fossaceca, R Iammartino
ACM Transactions on Intelligent Systems and Technology (TIST) 10 (3), 1-27

Artificial Intelligence and Machine Learning for Future Army Applications
JM Fossaceca, SH Young Ground/Air Multisensor Interoperability, Integration, and Networking for Persistent ISR IX. Vol. 10635.
International Society for Optics and Photonics, 2018

Multiattribute Framework for Requirements Elicitation in Phased Array Radar Systems
M Tompkins, R Iammartino, J Fossaceca
IEEE Transactions on Engineering Management

Evaluation of preconditions affecting symptomatic human error in general aviation and air carrier aviation accidents
AJ Erjavac, R Iammartino, JM Fossaceca
Reliability Engineering & System Safety 178, 156-163

Software obsolescence risk assessment approach using multicriteria decision‐making
TF Bowlds, JM Fossaceca, R Iammartino
Systems Engineering 21 (5), 455-465

Assessing the impact of requirements review on quality outcomes
TE White, R Iammartino, JM Fossaceca
Quality and Reliability Engineering International 34 (5), 882-893

Thomas A. Mazzuchi

Chair of the Department of Engineering Management and Systems Engineering in the School of Engineering and Applied Science
Professor of Engineering Management and Systems Engineering, at GW

Thomas Mazzuchi, D.Sc., received a B.A. in Mathematics from Gettysburg College, Gettysburg, PA; and an M.S. and a D.Sc., both in Operations Research from George Washington University, Washington, D.C. Before taking on his current faculty and administrative appointments at GW, he served as Chair of the Department of Operations Research, and as Interim Dean of the School of Engineering and Applied Science.

Dr. Mazzuchi has been engaged in consulting and research in the areas of reliability and risk analysis and systems engineering techniques for over 25 years. He served for two and a half years as a research mathematician at the international operations and process research laboratory of the Royal Dutch Shell Company. While at Shell, Dr. Mazzuchi was involved with reliability and risk analysis of large processing systems, maintenance optimization of off-shore platforms, and quality control procedures at large-scale chemical plants.

In his academic career, he has held research contracts in development of testing procedures for both the U.S. Air Force and the U.S. Army, in spares provisioning modeling with the U. S. Postal Service, in mission assurance with NASA, and in maritime safety and risk assessment with the Port Authority of New Orleans, the Washington Office of Marine Safety, Washington State Department of Transportation, and the San Francisco Bay Area Transit Authority.

Recent Awards:

  • Elected Member: International Statistics Institute; Washington Academy of Sciences
  • Leo Schubert Award for Excellence in Teaching of Science in College, 1997

John P. Sahlin, Ph.D.

Professorial Lecturer in Engineering

Dr. Sahlin has been engaged in the implementation of and research in complex systems engineering for over 25 years. His primary focus is on cybersecurity and system design of multi-tenant systems architecture, such as Managed Service Provider and Cloud Computing architecture for commercial and public-sector clients. In addition to his ongoing duties as Professorial Lecturer in Engineering at GW, Dr. Sahlin serves as Director of Technology for Engility’s Defense and Security Group, where he is responsible for strategic planning, network design, systems engineering, and cybersecurity programs for DoD, DOJ, DHS, and other clients.

At Engility, Dr. Sahlin leads research efforts in support of the Defense Technical Information Center, Deputy Assistant of Defense for Systems Engineering, and Defense Threat Reduction Agency on numerous topics, including the implementation of cloud computing architectures for academic environments.

After completing the B.S. in political science at the United States Naval Academy, Annapolis, MD, Dr. Sahlin earned the M.S. and Ph.D., both in systems engineering, from George Washington University, Washington, D.C.

Selected Publications:

  • Sahlin, J. P. and K. Lobera (2016). “Cloud Computing as a Catalyst for Change in STEM Education,” in Chao, L. (Ed.) Handbook of Research on Cloud-Based STEM Education for Improved Learning Outcomes [Hershey, PA: Information Science Reference]
  • Sahlin, J. P. (Ed.). (2015). Social Media and the Transformation of Interaction in Society. Hershey, PA: IGI Global. ISBN13: 9781466685567
  • Sahlin, J. (2014). “Federal Government Application of the Cloud Computing Application Integration Model,” in Khosrow-Pour, M. (Ed.). Encyclopedia of Information Science and Technology, 3rd Ed. [Hershey, PA: IGI Global]
  • Sahlin, J. (2013). “Cloud Computing: Past, Present, and Future,” in X. Yang, & L. Liu (Eds.), Principles, Methodologies, and Service-Oriented Approaches for Cloud Computing [Hershey, PA: IGI Global]

George Trawick, Ph.D., CISSP; U.S. Army (ret)

Professorial Lecturer in Engineering

Dr. George Trawick is an information assurance and cybersecurity professional with over 20 years’ experience in the cyber field. His special interests are risk assessment, accreditations, cryptology, cyber policy and cybercrime, for which his hands-on, operational experience coupled with extensive teaching have prepared him. He currently serves as assistant professor of cybersecurity at the National Defense University, College of Information and Cyberspace.

Formerly he was Chief of Information Assurance at the U.S. Army Human Resource Command, where he gained proficiency ranging from design, implementation and maintenance of classified networks to analysis of risk and operations. In his role at HRC, Dr. Trawick oversaw the IA elements for more than 350 personnel mission applications, as well as for IA training and compliance for the organization.

In addition to his background in cyber risk and security, Dr. Trawick is a skilled military leader with experience leading both infantry and artillery platoons, as well as directing battery deployments.