Senior Program Committee, 21st International Joint Conference on Artificial Intelligence , Pasadena, California, July 11-17, 2009.

Tutorial Speaker, 23rd National Conference on Artificial Intelligence, Vancouver, July 23rd, 2007.

Tutorial Speaker, 20th International Joint Conference on Artificial Intelligence, Hyderabad, India, January 2007.

Tutorial Speaker, 23rd International Conference on Machine Learning , Carnegie Mellon University, Pittsburgh, PA, July 25-29, 2006.

Senior Program Committee, 22nd National Conference on Artificial Intelligence , Vancover, Canada, July 22-26, 2006.

Senior Program Committee, 23rd International Conference on Machine Learning , Carnegie Mellon University, Pittsburgh, PA, July 25-29, 2006.

Invited Speaker, 20th National Conference on Artificial Intelligence (AAAI-2005) (celebrating the 25th anniversary of AAAI) , Pittsburgh, PA, July 9th - July 13th, 2005.

Program Committee, 22nd International Conference on Machine Learning (ICML-2005), Bonn, Germay, August 6th - Aug 10th, 2005.

Area Chair, 19th International Conference on Machine Learning (ICML-2002) , Sydney, Australia, July 8th - July 12th, 2002.

Area Chair, 18th International Conference on Machine Learning (ICML-2001) , Williams College, MA, June 28th - July 01, 2001.

Area Chair, Neural Information Processing Systems (NIPS-2001), , Vancouver, Canada, 2001.

Area Chair, Neural Information Processing Systems (NIPS-2000), , Denver, CO, Nov. 28th - Nov. 30th, 2000.

Area Chair, 17th International Conference on Machine Learning (ICML-2000) , Stanford, CA, June 29th - July 02, 2000.

Program Committee, 17th National Conference on Artificial Intelligence (AAAI-2000), Austin, Texas, July 30th - Aug 3rd, 2000.

Program Committee, 16th International Conference on Machine Learning (ICML-99) , Bled, Slovenia, June 27th - 30th, 1999.

Program Committee, 15th International Conference on Machine Learning (IMLC-98) , Madison, Wisconsin, July 24th - 26th, 1998.

Program Committee, 15th National Conference on Artificial Intelligence (AAAI-98), Madison, Wisconsin, July 26-30th, 1998.

Workshop co-Organizer (with Andrew Moore, CMU), Workshop on Machine learning and Reinforcement Learning in Manufacturing, Conference on Automated Learning and Discovery, Carnegie Mellon University, Pittsburgh, PA, June 11-13, 1998.

Judge, Mobile Robot Competition, Fourteenth National Conference on Artificial Intelligence (AAAI-97), Providence, RI July 27-31, 1997.

Invited Lecturer, Simon Bolivar University, Venezuela, June 22-29, 1997.

Invited Speaker, NSF/Pro-tem CC Workshop on Intelligent Robotic Agents , Porto Alegre, Brazil, March 17th-20th, 1997.

Program Committee, 14th International Conference on Machine Learning (IMLC-97) , Nashville, Tennessee, July 8th - 12th, 1997.

Program Committee, 15th International Joint Conference on Artificial Intelligence (IJCAI-97) , Nagoya, Japan, August 23rd-29th, 1997.

Invited speaker, Workshop on Towards Real Autonomy , IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS-96), Osaka, Japan, November 1996.

Invited speaker, AAAI Fall Symposium on Learning Complex Behaviors for Intelligent Adaptive Systems , MIT, Boston, Nov. 9-11, 1996.

Organizer and Program Co-chair (with Leslie Kaelbling), NSF Workshop on Reinforcement Learning, April 12th-14th, Hilltop House, Harper's Ferry, 1996.

Program Committee, 13th National Conference on Artificial Intelligence (AAAI-96), Portland, Oregon, August 1996.

Program Committee, IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS-96), Osaka, Japan, November, 1996.

Program Committee, International Workshop on Robot Learning (ROBOLEARN-96), Key West, May 1996.

Workshop and Tutorial Chair, International Conference on Machine Learning (IMLC-95), Lake Tahoe, CA, July 1995.

Program Committee, International Conference on Machine Learning (IMLC-95), Lake Tahoe, CA, July 1995.

Organizer and Program Chair, MLC-COLT 1994 International Workshop on Robot Learning, July 10th, New Brunswick, N.J., 1994.