Steven Gillis, Ph.D. is a Managing Director at ARCH Venture Partners, focused on the evaluation of new life science technologies and also on the development and growth of ARCH's biotechnology portfolio companies. Dr. Gillis was a founder and director of Corixa Corp. and served as the company�s Chief Executive Officer since inception and as its Chairman since January of 1999. Corixa was acquired by GlaxoSmithKline in July of 2005. Prior to starting Corixa, Dr. Gillis was a founder and director of Immunex Corp. From 1981 until his departure in 1994, Dr. Gillis served as Immunex�s Director of Research and Development, Chief Scientific Officer, and Chief Executive Officer of Immunex�s Research and Development subsidiary. Dr. Gillis was interim Chief Executive Officer of Immunex Corp. following its majority purchase by American Cyanamid Co. and he remained a member of the Board of Directors until 1997. Immunex was acquired by Amgen Inc. in 2002. Dr. Gillis is an immunologist by training and is credited as being a pioneer in the field of cytokines and cytokine receptors, directing the development of multiple marketed products, including Leukine�, Prokine�, Enbrel�, and Bexxar�. Dr. Gillis received his B.A. from Williams College in 1975 and his Ph.D. from Dartmouth College in 1978.