Staff information

Biography

Samrat Chatterjee is a Senior Data/Operations Research Scientist and Team Lead with the Data Sciences and Machine Intelligence Group in the Physical and Computational Sciences Directorate at U.S. Department of Energy’s Pacific Northwest National Laboratory (PNNL) in Richland, WA. His research focuses on cyber and physical infrastructure network resilience modeling, risk and decision analysis, and data analytics in support of the Department of Energy, Department of Homeland Security, and the Department of Defense. He also serves as the lead for Artificial Intelligence (AI) systems thrust within PNNL’s multi-year AI research initiative, and holds an affiliate faculty appointment in the Civil and Environmental Engineering department at Northeastern University in Boston, MA. Samrat conducted postdoctoral research on infrastructure risk and decision analysis at the DHS-CREATE Homeland Security Center of Excellence at the University of Southern California, and holds a Ph.D. in Civil Systems Engineering from Vanderbilt University. He has authored 2 books and over 65 peer-reviewed journal articles, conference papers, and technical reports; including in leading journals such as Nature’s Scientific Reports, Reliability Engineering and System Safety, and Risk Analysis, and received multiple best paper and poster awards at the Institute of Electrical and Electronics Engineers (IEEE) homeland security technologies conference and the Society for Risk Analysis (SRA) annual meeting. He is the current chair of the Security and Defense specialty group of SRA and past chair of the Engineering and Infrastructure specialty group, and recently completed a membership term with the National Academies-Transportation Research Board’s (TRB) committee on Transportation of Hazardous Materials. His experience includes disaster risk modeling at the International Institute for Applied Systems Analysis (IIASA) in Austria on a U.S. National Academy of Sciences (NAS) fellowship through a U.S. National Science Foundation (NSF) grant; and traffic flow simulation for a US-based engineering consulting firm. He is a senior member of IEEE, and member of SRA and the Military Operations Research Society (MORS).

Research Interests

• Infrastructure system security and resilience
• Risk and decision analysis
• Probabilistic modeling, simulation, and optimization
• Statistical learning
• Network science

Education and Credentials

• Postdoc, Infrastructure Risk and Decision Analysis, CREATE Homeland Security Center of Excellence, University of Southern California
• Ph.D., Civil Engineering (Systems Risk Analysis), Vanderbilt University
• M.S., Civil Engineering (Transportation Systems), University of Texas at Austin
• B.E. (Honors), Civil Engineering, Punjab Engineering College, India

Affiliations and Professional Service

• Institute of Electrical and Electronics Engineers (IEEE)
• Society for Risk Analysis (SRA)
• Military Operations Research Society (MORS)

Awards and Recognitions

• Best Poster Award, Society for Risk Analysis
• Best Paper Award (Attack and Disaster Track), IEEE Symposium on Technologies for Homeland Security
• Best Paper Award (Cyber Security Track), IEEE Symposium on Technologies for Homeland Security
• Certificate of Outstanding Contribution in Reviewing, Reliability Engineering and System Safety Journal
• Laboratory Director's Pathway to Excellence Award, PNNL
• Fellow, CREATE Homeland Security Center, University of Southern California
• Outstanding Performance Award, National Security Directorate, PNNL
• Research Transition Project of the Year Award, CREATE Homeland Security Center, University of Southern California
• IBM Graduate Fellowship, Vanderbilt University
• Young Scientists Summer Program Fellowship-National Science Foundation Grant, U.S. National Academy of Sciences
• Full Tuition Scholarship, Punjab Engineering College, India

PNNL Publications

2023

• Chatterjee S., A. Bhattacharya, A. Dutta, A. Rahman, T. Ramachandran, S. Chikkagoudar, and R. Bharadwaj. 2023. "Collaboration and Negotiation." In Autonomous Intelligent Cyber Defense Agent (AICA). Advances in Information Security, edited by A. Kott. 229-251. Cham:Springer. PNNL-SA-171718. doi:10.1007/978-3-031-29269-9_11
• Chatterjee S., D.G. Thomas, D.C. Fortin, K. Pazdernik, B.A. Wilson, and L. Newburn. 2023. "Dynamic Network Analysis of Nuclear Science Literature for Research Influence Assessment." ESARDA Bulletin 65. PNNL-SA-166748. doi:10.3011/ESARDA.IJNSNP.2023.3
• Dutta A., E. Al-Shaer, S. Chatterjee, and Q. Duan. 2023. "Autonomous Cyber Defense Against Dynamic Multi-strategy Infrastructural DDoS Attacks." In IEEE Conference on Communications and Network Security (CNS 2023), October 2-5, 2023, Orlando, FL, 1-9. Piscataway, New Jersey:IEEE. PNNL-SA-189781. doi:10.1109/CNS59707.2023.10288937
• Nettasinghe D., S. Chatterjee, R. Tipireddy, and M. Halappanavar. 2023. "Extending Conformal Prediction to Hidden Markov Models with Exact Validity via de Finetti’s Theorem for Markov Chains." In Proceedings of Machine Learning Research: 40th International Conference on Machine Learning (ICML 2023), July 23-29, 2023, Honolulu, HI, edited by A. Krause, et al, 25890--25903. Maastricht:ML Research Press. PNNL-SA-178224.
• Oster M.R., E. King, C. Bakker, A. Bhattacharya, S. Chatterjee, and F. Pan. 2023. "Multi-Level Optimization with the Koopman Operator for Data-Driven, Domain-Aware, and Dynamic System Security." Reliability Engineering & System Safety 237. PNNL-SA-169379. doi:10.1016/j.ress.2023.109323
• Subasi O., S. Purohit, A. Bhattacharya, and S. Chatterjee. 2023. "Impact-Driven Sampling Strategies for Hybrid Attack Graphs." In IEEE International Symposium on Technologies for Homeland Security (HST 2022) November 14-15, 2022, Virtual, Online, 1-7. Piscataway, New Jersey:IEEE. PNNL-SA-178629. doi:10.1109/HST56032.2022.10025439
• Thekdi S.A., U. Tatar, J. Santos, and S. Chatterjee. 2023. "Disaster Risk and Artificial Intelligence: A Framework to Characterize Conceptual Synergies and Future Opportunities." Risk Analysis 43, no. 8:1641-1656. PNNL-SA-167006. doi:10.1111/risa.14038

2022

• Chikkagoudar S., S. Chatterjee, R. Bharadwaj, A. Ganguly, S. Kompella, and D.E. Thorsen. 2022. "Assurance by Design for Cyber Physical Data-Driven Systems." In IoT for Defense and National Security, edited by R. Douglass, et al. 191 - 212. Hoboken, New Jersey:John Wiley & Sons, Inc. PNNL-SA-171061. doi:10.1002/9781119892199.ch11
• Hussain M., M.H. Khan, A. Azad, S. Chatterjee, R.T. Brigantic, and M. Halappanavar. 2022. "Disruption-Robust Community Detection Using Consensus Clustering in Complex Networks." In IEEE International Symposium on Technologies for Homeland Security (HST 2022), November 14-15, 2022, Virtual, Online, 1-6. Piscataway, New Jersey:IEEE. PNNL-SA-174273. doi:10.1109/HST56032.2022.10024983

2021

• Bakker C., A. Bhattacharya, S. Chatterjee, and D.L. Vrabie. 2021. "Metagames and Hypergames for Deception-Robust Control." ACM Transactions on Cyber-Physical Systems 5, no. 3:1-25. PNNL-SA-147800. doi:10.1145/3439430
• Bakker C., A. Bhattacharya, S. Chatterjee, M.R. Oster, C.J. Perkins, and F. Pan. 2021. "Solvability, Operability, and Security for Cyber-Physical Systems: New Computational Methods with Revised Assumptions." Journal of Information Warfare 20, no. 2:1-26. PNNL-SA-154041.
• Jones R.D., D.C. Fortin, S. Chatterjee, D.G. Thomas, and L. Newburn. 2021. "User Role Identification in Software Vulnerability Discussions over Social Networks." In IEEE International Conference on Intelligence and Security Informatics (ISI 2021), November 2-3, 2021, VIrtual, Online, 1-3. Piscataway, New Jersey:IEEE. PNNL-SA-166021. doi:10.1109/ISI53945.2021.9624857
• King E., C. Bakker, A. Bhattacharya, S. Chatterjee, F. Pan, M.R. Oster, and C.J. Perkins. 2021. "Solving the Dynamics-Aware Economic Dispatch Problem with the Koopman Operator." In Proceedings of the Twelfth ACM International Conference on Future Energy Systems (e-Energy '21), June 28-July 2, 2021, Virtual, Online, 137-147. New York, New York:Association for Computing Machinery. PNNL-SA-159920. doi:10.1145/3447555.3464864
• Subasi O., and S. Chatterjee. 2021. "Efficient Sampling of Complex Interdependent and Multiplex Networks." Journal of Complex Networks 9, no. 5:Article No. cnab029. PNNL-SA-154329. doi:10.1093/comnet/cnab029

2020

• Bakker C., A. Bhattacharya, S. Chatterjee, and D.L. Vrabie. 2020. "Hypergames and Cyber-Physical Security for Control Systems." ACM Transactions on Cyber-Physical Systems 4, no. 4:45. PNNL-SA-144077. doi:10.1145/3384676
• Bakker C., A. Bhattacharya, S. Chatterjee, C.J. Perkins, and M.R. Oster. 2020. "The Koopman Operator: Capabilities and Recent Advances." In IEEE Resilience Week (RWS 2020), October 19-23, 2020, Salt Lake City, UT, 207-214. Piscataway, New Jersey:IEEE. PNNL-SA-153456. doi:10.1109/RWS50334.2020.9241276
• Bakker C., J.B. Webster, K.E. Nowak, S. Chatterjee, C.J. Perkins, and R.T. Brigantic. 2020. "Multi-Game Modelling for Counter-Smuggling." Reliability Engineering & System Safety 200. PNNL-SA-139977. doi:10.1016/j.ress.2020.106958
• Chatterjee S., and S.A. Thekdi. 2020. "An iterative learning and inference approach to managing dynamic cyber-vulnerabilities of complex systems." Reliability Engineering & System Safety 193. PNNL-SA-140369. doi:10.1016/j.ress.2019.106664
• Chatterjee S., R.T. Brigantic, and A.M. Waterworth. 2020. Applied Risk Analysis for Guiding Homeland Security Policy. Hoboken, New Jersey:John Wiley & Sons, Inc. PNNL-SA-139656.
• Oster M.R., S. Chatterjee, F. Pan, C. Bakker, A. Bhattacharya, and C.J. Perkins. 2020. "Power system resilience through defender-attacker-defender models with uncertainty: an overview." In IEEE Resilience Week (RWS 2020), October 19-23, 2020, Salt Lake City, UT, 165-172. Piscataway, New Jersey:IEEE. PNNL-SA-153583. doi:10.1109/RWS50334.2020.9241279
• Yadav N., S. Chatterjee, and A. Ganguly. 2020. "Resilience of Urban Transport Network-of-Networks under Intense Flood Hazards Exacerbated by Targeted Attacks." Scientific Reports 10, no. 2020:10350. PNNL-SA-153287. doi:10.1038/s41598-020-66049-y

2019

• Bhattacharya A., S. Bopardikar, S. Chatterjee, and D.L. Vrabie. 2019. "Cyber Threat Screening Using a Queuing-Based Game-Theoretic Approach." Journal of Information Warfare 18, no. 4 (Special Edition):37-52. PNNL-SA-145431.
• Thekdi S.A., and S. Chatterjee. 2019. "Toward adaptive decision support for assessing infrastructure system resilience using hidden performance measures." Journal of Risk Research 22, no. 8:1020-1043. PNNL-SA-115718. doi:10.1080/13669877.2018.1440412
• Visweswara Sathanur A., B. Sripimonwan, M. Halappanavar, S. Chatterjee, A. Ganguly, and K. Clark. 2019. "Identification of Critical Airports from the Perspective of Delay and Disruption Propagation in Air Travel Networks." In IEEE International Symposium on Technologies for Homeland Security (HST 2019), November 5-6, 2019, Woburn, MA, 1-6. Piscataway, New Jersey:IEEE. PNNL-SA-147072. doi:10.1109/HST47167.2019.9032999

2018

• Bhatia U., S. Chatterjee, A.R. Ganguly, J. Gao, M. Halappanavar, M.R. Oster, and K. Clark, et al. 2018. "Aviation Transportation, Cyber Threats, and Network-of-Networks: Modeling Perspectives for Translating Theory to Practice." In IEEE International Symposium onTechnologies for Homeland Security (HST 2018), October 23-24, 2018, Woburn, MA, 1-7. Piscataway, New Jersey:IEEE. PNNL-SA-134574. doi:10.1109/THS.2018.8574123
• Duan Q., E. Al-Shaer, S. Chatterjee, M. Halappanavar, and C.S. Oehmen. 2018. "Proactive Routing Mutation Against Stealthy Distributed Denial of Service Attacks - Metrics, Modeling and Analysis." Journal of Defense Modeling and Simulation 15, no. 2:219-230. PNNL-SA-128859. doi:10.1177/1548512917731002
• Mutlu B., G.G. Kestor, J.B. Manzano Franco, O. Unsal, S. Chatterjee, and S. Krishnamoorthy. 2018. "Characterization of the Impact of Soft Errors on Iterative Methods." In 25TH IEEE INTERNATIONAL CONFERENCE ON HIGH PERFORMANCE COMPUTING, DATA, AND ANALYTICS (HiPC 2018), December 17-20, 2018, Bengaluru, Inda, 203-214. Los Alamitos, California:IEEE Computer Society. PNNL-SA-138072. doi:10.1109/HiPC.2018.00031

2017

• Chen Z., A. Rose, F. Prager, and S. Chatterjee. 2017. "Economic Consequences of Aviation System Disruptions : A Reduced-Form Computable General Equilibrium Analysis." Transportation Research. Part A. Policy and Practice 95. PNNL-SA-115526. doi:10.1016/j.tra.2016.09.027
• Chikkagoudar S., S. Chatterjee, D.G. Thomas, T.E. Carroll, and G. Muller. 2017. "Machine Learning." In Research Methods for Cyber Security, edited by TW Edgar and DO Manz. 153-173. Cambridge, Massachusetts:Syngress. PNNL-SA-122747. doi:10.1016/B978-0-12-805349-2.00006-6
• Rose A., F. Prager, Z. Chen, S. Chatterjee, D. Wei, N. Heatwole, and E. Warren. 2017. Economic Consequence Analysis of Disasters: The ECAT Software Tool. Singapore:Springer Nature Singapore. PNNL-SA-126764. doi:10.1007/978-981-10-2567-9
• Shekar V., L. Fiondella, S. Chatterjee, and M. Halappanavar. 2017. "Quantifying Economic and Environmental Impacts of Transportation Network Disruptions with Dynamic Traffic Simulation." In IEEE International Symposium on Technologies for Homeland Security (HST 2017), April 25-26, 2017, Waltham, MA, 1-4. Piscataway, New Jersey:IEEE. PNNL-SA-124020. doi:10.1109/THS.2017.7943472
• Shekar V., L. Fiondella, S. Chatterjee, and M. Halappanavar. 2017. "Quantitative Assessment of Transportation Network Vulnerability with Dynamic Traffic Simulation Methods." In IEEE International Symposium onTechnologies for Homeland Security (HST 2017), April 25-26, 2017, Waltham, MA, 1-7. Piscataway, New Jersey:IEEE. PNNL-SA-124025. doi:10.1109/THS.2017.7943454
• Tipireddy R., S. Chatterjee, P.R. Paulson, M.R. Oster, and M. Halappanavar. 2017. "Agent-Centric Approach for Cybersecurity Decision-Support with Partial Observability." In IEEE International Symposium on Technologies for Homeland Security (HST 2017), April 25-26, 2017, Waltham, MA, 1-6. Piscataway, New Jersey:IEEE. PNNL-SA-122071. doi:10.1109/THS.2017.7943478

2016

• Chatterjee S., M. Halappanavar, R. Tipireddy, and M.R. Oster. 2016. "Game Theory and Uncertainty Quantification for Cyber Defense Applications." SIAM News 49, no. 6:1-5. PNNL-SA-119091.
• Chatterjee S., R. Tipireddy, M.R. Oster, and M. Halappanavar. 2016. "Propagating Mixed Uncertainties in Cyber Attacker Payoffs: Exploration of Two-Phase Monte Carlo Sampling and Probability Bounds Analysis." In IEEE Symposium on Technologies for Homeland Security (HST 2016), May 10-11, 2016, Waltham, MA. Piscataway, New Jersey:IEEE. PNNL-SA-120091. doi:10.1109/THS.2016.7568967
• Rauf U., F. Gillani, E. Al-Shaer, M. Halappanavar, S. Chatterjee, and C.S. Oehmen. 2016. "Formal Approach For Resilient Reachability based on End-System Route Agility." In Third ACM Workshop on Moving Target Defense (MTD 2016), October 24-28, 2016, Vienna, Austria, 117-127. New York, New York:ACM. PNNL-SA-121212. doi:10.1145/2995272.2995275
• Saha S., A.K. Vullinati, M. Halappanavar, and S. Chatterjee. 2016. "Identifying Vulnerabilities and Hardening Attack Graphs for Networked Systems." In IEEE Symposium on Technologies for Homeland Security (HST 2016), May 10-11, 2016, Waltham, MA. Piscataway, New Jersey:IEEE. PNNL-SA-116666. doi:10.1109/THS.2016.7568884

2015

• Bramer L.M., S. Chatterjee, A.E. Holmes, S.M. Robinson, S.F. Bradley, and B.M. Webb-Robertson. 2015. "A Machine Learning Approach for Business Intelligence Analysis using Commercial Shipping Transaction Data." In The 11th International Conference on Data Mining (DMIN 2015), July 27-30, 2015, Las Vegas, Nevada, 162-167. Athens, Georgia:CSREA Press. PNNL-SA-110014.
• Chatterjee S., M. Halappanavar, R. Tipireddy, M.R. Oster, and S. Saha. 2015. "Quantifying Mixed Uncertainties in Cyber Attacker Payoffs." In IEEE International Symposium on Technologies for Homeland Security (HST 2015), April 14-16, 2015, Waltham, Massachusetts, 1-6. Piscataway, New Jersey:IEEE. PNNL-SA-106540. doi:10.1109/THS.2015.7225287
• Chatterjee S., R. Tipireddy, M.R. Oster, and M. Halappanavar. 2015. "A Probabilistic Framework for Quantifying Mixed Uncertainties in Cyber Attacker Payoffs." National Cybersecurity Institute Journal 2, no. 3:13-24. PNNL-SA-114140.