Marc Krellenstein Brief CV

marc dot krellenstein at gmail


President/CTO, Live Connector, Inc. (6/20 present), Cambridge, MA
Independent consultant (6/20 present)
Senior Principal Engineer, Amazon (5/16 5/20), Boston, MA
Lecturer, Psychology, College of Professional Studies, Northeastern University (6/13-present)
Consultant to Harvard Business School, Wayfair; independent developer in search and text mining (4/15-5/16)
CTO/SVP of Technology Development, Decision Resources Group (3/14-4/15)
Adjunct Faculty, Ethics and Gender Issues, Emmanuel College, Boston (7/94-12/13)
CTO, Relay Technology Management (8/12-11/13) (Acquired by Decision Resources Group), Cambridge, MA
Consultant to Havarvard Business School, Relay Technology Management (8/11-8/12)
Founder, CEO (8/07-9/08), CTO (8/07-7/11), Lucid Imagination (now LucidWorks), San Francisco, CA
CTO (10/04-8/07), Elsevier, VP, Search & Discovery Technology (1/02-10/04)
Founding technologist, CTO/SVP, Engineering, Northern Light Technology, (1/96-1/02), Cambridge, MA
Consultant to American Institute for Research/U.S. Dept. of Education, Washington, DC on access to public information systems (2000-2001)
Consultant to Compass Information Systems, King of Prussia, PA on clinical tools for tracking progress of mental health patients (1997-1997)
Director of Systems Development, Ligature, Boston, MA (1994-1996)
Consultant to Ziff Desktop Information, Ligature (1994-1994)
VP, R&D, Faxon Research Services, Cambridge, MA (1992-1994)
Software architect, Ziff Desktop Information, Cambridge, MA (1992-1992)
Director, R&D Text, Access Technology/CompuServe, Natick, MA (1985-1992)
Director, Product Development, Softbridge Group, Cambridge, MA (1983-1985)
Manager, Microcomputer Development, Applications, Interactive Data Corp/Chase Econometrics, Cambridge, MA (1980 1983)
Software Development Engineer, Hewlett-Packard medical products, Waltham, MA (1979-1980)


M.S. Computer Science, University of Wisconsin Madison
M.A., Ph.D. Psychology, The New School for Social Research
A.B. Philosophy, Cornell University

Selected publications in computer science

Krellenstein, M. (September, 2009). Full text search engines vs. DBMS. Lucid Imagination.
Krellenstein, M. (April, 2009). Starting a search application. Lucid Imagination. 
Krellenstein, M. (2004). Text mining. Library Connect, 2 (2).
Kornai, A., Krellenstein, M., Mulligan, M., Twomey, D., Veress, F., Wysoker, A. (2003). Classifying the Hungarian web. In Copestake, A. and Hajic, J. (Eds.), Proceedings of the European Association for Computational Linguistics 2003 (pp. 203-210). Budapest, Hungary. Available at
Krellenstein, M. (1999). The commercial view: Shipping the digital library V1.0. In Proceedings of the IEEE Forum on Research and Technology Advances in Digital Libraries (pp. 92-93). Los Alamitos, CA: IEEE Computer Society.
Krellenstein, M., Method and Apparatus for Searching a Database of Records, U.S. Patent. 5,924,090, July 13, 1999. Available at
Krellenstein, M. (1987). A reply to "Parallel Computation and the Mind-Body Problem". Cognitive Science, 11, 155-157. Available at

Invited presentations in computer science

The future of enterprise search with Solr and Lucene. Department of Defense Intelligence Information Systems (DODIIS) meeting, Detroit, May, 2011. Revised version delivered at Lucene Revolution 2011.
Full text search with open source LuceneInfonortics Search Engine meeting, Boston, April, 2007.
Content-based recommendations. Society for Scholarly Publishing annual meeting, Arlington, Virginia, June, 2006.
Alternatives to federated search. NFAIS, Philadelphia, July, 2005. Available at .
Next generation search. Karolinska Institute. Stockholm, August, 2004. Available at
Technology for integrated Information access and discovery. 7th International Bielefeld Conference: Thinking Beyond Digital Libraries. Bielefeld, Germany, February, 2004.
Automatic classification at Northern Light. Workshop in Operational Text Classification, SIGIR 2002, Tampere, Finland, August, 2002.
Searching very large data sets. Internet Archive Colloquium 2000, San Francisco, March, 2000.
Trends in the development of digital libraries. United Nations, New York, September, 1999.
The commercial view: Shipping the digital library V1.0. Keynote presentation at IEEE Advances in Digital Libraries Conference, Baltimore, July, 1999.

Selected publications in philosophy/psychology

Krellenstein, M. (2022). Adopting moral abolitionism. Academia Letters, Article 5298. Available at

Krellenstein, M. (2017). Moral nihilism and its implications. Journal of Mind and Behavior, 38, 75-90. Author version available at
Krellenstein, M. (2009). A modern nihilism. Unpublished manuscript available at
Krellenstein, M. (2001) What have we learned from evolutionary psychology? Unpublished manuscript available at or at
Krellenstein, M. (1995). Unsolvable problems, visual imagery and explanatory satisfaction. Journal of Mind and Behavior, 16, 235-254. Author version available at
Krellenstein, M. (1987). A reply to "Parallel Computation and the Mind-Body Problem". Cognitive Science, 11, 155-157. Available at