Steve Gillis is an immunologist-turned-venture-capitalist who founded two major biotech companies (Immunex and Corixa) and helped develop multiple marketed drugs including Enbrel before joining ARCH Venture Partners. He serves as both a director at large pharma company Takeda and chairman or director of numerous early-stage biotech companies, giving him an unusual dual perspective bridging cutting-edge science and established pharmaceutical operations. Steve Gillis is an immunologist-turned-venture-capitalist who founded two major biotech companies (Immunex and Corixa) and helped develop multiple marketed drugs including Enbrel before joining ARCH Venture Partners. He serves as both a director at large pharma company Takeda and chairman or director of numerous early-stage biotech companies, giving him an unusual dual perspective bridging cutting-edge science and established pharmaceutical operations.