U.S. Department of Energy

Pacific Northwest National Laboratory

Team Bios

Luke Gosink - Signature Discovery Initiative Lead

Dr. Luke Gosink is a senior research scientist in the National Security Directorate at Pacific Northwest National Laboratory. Dr. Gosink received a B.S. in Chemistry and Ph.D. in Computer Science from the University of California at Davis.  He leads a multi-million dollar research portfolio that focuses on developing novel machine learning and statistical aggregation methods that can detect complex events in large amounts of streaming, high-... Read More

Nathan A. Baker - Signature Discovery Chief Scientist

Nathan A. Baker, Ph.D. is a Laboratory Fellow in the Applied Statistics and Computational Modeling Group at Pacific Northwest National Laboratory (PNNL). His research focuses on the development of new algorithms and mathematical methods in biophysics, nanotechnology, and informatics. Current research projects include new computational methods for modeling solvation in biomolecular systems (http://www.... Read More

George T. Bonheyo - Signature Discovery Methods

George Bonheyo is a senior research scientist in the Energy and Environment Directorate at Pacific Northwest National Laboratory's Marine Sciences Laboratory in Sequim, Washington. He has over 20 years of experience applying genetic engineering and molecular microbiology to address challenges in national security, environment, human health, and biotechnology. He received his B.S. in biology from Bucknell University and his M.S. and Ph.D. in... Read More

Landon Sego - Signature Discovery Analytic Framework Focus Area Lead

Landon Sego is a Statistical Scientist and joined PNNL in 2006. He holds a Ph.D. in Statistics from Virginia Polytechnic Institute and State University, where he developed statistical methods for health care surveillance and the monitoring of rare events. He also holds an M.S. in Statistics from the University of Wisconsin—Madison and a B.S. in Statistical Science from Brigham Young University. Most recently, Dr. Sego led the Signature Quality... Read More

Mark F. Tardiff - Signature Discovery Outreach

Mark Tardiff is a senior research scientist in the National Security Directorate at Pacific Northwest National Laboratory. He received a Master's in Biology from the State University of New York in Syracuse and has over 25 years of experience as a research scientist. He has extensive experience in designing experiments, test planning, conducting operational test and evaluation experiments, and exploratory data analysis and algorithm development... Read More

Jennifer Hodas - Technology Commercialization Lead

Dr. Jennifer Hodas joined Pacific Northwest National Laboratory (PNNL) as a Commercialization Manager in April 2014. She is responsible for the identification, protection, and management of the Laboratory’s growing Electricity Infrastructure, Buildings, and Fuel Cells portfolios. She is the Commercialization Manager for the Control of Complex Systems Initiative (CCSI), the Future Power Grid Initiative (FPGI), and the Signatures Discovery... Read More

Carrie Almquist - Signature Discovery Initiative Operations Manager

Ms. Almquist is currently a project coordinator in the Computational and Statistical Analytics Division within the National Security Directorate. Ms. Almquist provides operations support for the Signature Discovery Initiative with responsibility for effective stewardship of resources, including capability development Laboratory Directed Research and Development projects. In addition, she supports the educational programs for her division at... Read More

Daniel Best - Principal Investigator

Cyber Analytics: Investigating algorithms and visualizations to enable the identification of patterns and features in cyber data to enable efficient analysis of the given problem space. Visual Analytics: Investigation into the visual metaphors and human computer interactions needed to enable users to utilize human cognition to understand their data. Graph Analytics: Applying algorithms and techniques to find solutions to problems that can be... Read More

Carlos G. Fraga - Principle Investigator

Dr. Carlos G. Fraga is a Senior Research Scientist in the Chemical and Biological Signature Science Group at Pacific Northwest National Laboratory (PNNL). Dr. Fraga joined PNNL after 12 years as an U.S. Air Force officer. While in the Air Force, Dr. Fraga managed and performed research dealing with the sampling, detection, and fate of chemical weapon related compounds. He also taught chemistry at the Air Force Academy including a course on... Read More

Nancy Hess - Principal Investigator

As Science Theme Lead, Dr. Hess leads development and implementation of a vision for Terrestrial and Subsurface Ecosystem science within EMSL. She identifies specific objectives/targets and guides the assembly of the needed to implement the vision. Dr. Hess has published more than 130 peer-reviewed journal articles on the application of molecular-level spectroscopic techniques -- X-ray absorption spectroscopy, neutron spectroscopy and... Read More

Alejandro Heredia-Langner - Principal Investigator

Dr. Alejandro Heredia-Langner is a Research Scientist in the Applied Statistics and Computational Modeling Group at Pacific Northwest National Laboratory (PNNL).  While at PNNL, Dr. Heredia-Langner has worked on building, applying and analyzing results from statistically designed experiments in areas of sensor modeling and optimization for the detection of explosives, studying the effects of particle size on the transport of chemical waste, and... Read More

Nathan Hodas - Principal Investigator

Dr. Nathan Hodas is a Senior Research Scientist in the Data Science and Analytics group at Pacific Northwest National Lab (PNNL). He is an expert in statistical and bio-physics, human dynamics, and information-theoretic machine learning. He has significant experience connecting complex (and messy) real-world data with analytical models of physical, biological, and human systems. Before arriving at PNNL in the spring of 2014, he was a post-doc... Read More

Emilie Purvine - Principal Investigator

Dr. Emilie Purvine completed her Ph.D. in Mathematics from Rutgers University, New Jersey, in May of 2011. Her thesis research investigated properties of non-linear (specifically rational) difference equations. She also focused on graph theory in her course work and qualifying exams. After graduate school Emilie joined the Pacific Northwest National Laboratory as a postdoctoral research associate working on semantic knowledge systems and graph... Read More

Cliff Joslyn - Principal Investigator

Cliff Joslyn is the Chief Scientist for Knowledge Sciences at PNNL. As a mathematical systems theorist, he has broad interest and experience in a range of mathematical modeling and analytical methods, with specific research interest in discrete mathematics, topological data modeling, applied order theory, semantic technologies, knowledge discovery in databases, computational semiotics, and generalized information theory. He holds a BA with High... Read More

Lee Ann McCue - Principal Investigator

Dr. McCue's early research focused on the development and application of comparative genomics methods for studies of transcription regulation in bacteria. Her research pioneered the phylogenetic footprinting approach for predicting transcription factor binding sites de novo using multiple bacterial genomes, and contributed to a number of algorithmic advances to the Gibbs sampling technique for multiple sequence alignment. Her research at PNNL... Read More

Jason McDermott - Principal Investigator

Dr. Jason McDermott, senior research scientist, has extensive research experience in molecular and structural virology and data resource design, data integration and prediction of biological networks, bridging experimental and computational biology. Currently, his research interests include data integration of high-throughput ‘omics data for biomarker discovery, developing systems biology models in a number of systems including cancer and host-... Read More

Christopher Oehmen - Principal Investigator

Chris Oehmen received his B.A. in physics and mathematics from Saint Louis University in 1995. He earned M.S. and Ph.D. degrees in biomedical engineering from the University of Memphis/University of Tennessee, HSC Joint program in 1997 and 2003, respectively. Since then, he has been at PNNL as a senior research scientist specializing in high performance computing applications in biology, with special emphasis on how these biological approaches... Read More

Alex Stephan - Principal Investigator

Alex Stephan is a Senior Scientist and Technical Team Lead at the Pacific Northwest National Laboratory, focused principally on the Geospatial Sciences during his 20 years at the lab. Alex specializes in image and geospatial analysis, and programming geographic information systems and imagery analysis applications. He has been the project manager and principle investigator on numerous R&D and analysis projects in the fields of geospatial... Read More

Andrew Stevens - Principal Investigator

Andrew Stevens is a machine-learning scientist. He began working at PNNL in 2009 after finishing his MS in mathematics at Washington State University, where he worked on numerical partial differential equations. He is currently pursuing a PhD at Duke University. He also holds a BA in mathematics and applied computer science from William Penn University. Since joining the lab, Andrew has worked on a number of projects in computer vision, data... Read More

Marvin Warner - Principal Investigator

Dr. Marvin Warner is a staff scientist in the Chemical and Biological Signature Sciences Group.  He received a B.S. in Chemistry from the University of Kentucky in 1998 and a M.S. (2000) and Ph.D. (2003) in Chemistry (Materials Science Focus) from the University of Oregon.  His doctoral work focused on the development of engineered gold nanoparticles for the biologically inspired templating of nanoparticle arrays to serve as single electron... Read More

Bobbie-Jo Webb-Robertson - Principal Investigator

Bobbie-Jo Webb-Robertson is a Senior Research Scientist and joined PNNL in 2002. She holds a Ph.D. and M.E. in Decision Sciences and Engineering Systems and Statistics and Operations Research, respectively, from Rensselaer Polytechnic Institute and State University, where she developed Bayesian methods for performing pairwise protein sequence alignment.   She also holds B.S. in Mathematics from Eastern Oregon University. Most recently, Dr. Webb-... Read More

Jennifer B. Webster - Principal Investigator

Dr. Jennifer Webster is a Mathematician and joined the Applied Statistics and Computational Modeling group at PNNL in 2013. Her work includes machine learning; inverse problems; spectral analysis for nuclear engineering applications; computer vision methodologies; and graph analysis methods. She has had co-PI roles on two LDRD projects: SDI’s Challenge Project “Signatures of Illicit Nuclear Trafficking” and the Lab level LDRD “Strategic Goods... Read More

Paul Whitney - Principal Investigator

Dr. Paul Whitney holds a Ph.D. in Statistics from the University of Wisconsin - Madison (1984). Dr. Whitney has accomplished diverse technical projects during his more than 20 years at the Pacific Northwest National Laboratory, ranging from environmental monitoring to image analysis to text visualization and analysis. A critical component across these projects is evaluation of the performance of the technologies. Dr. Whitney has organized both... Read More
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