Walker Leads UMaine’s Cutting-Edge Research Facility Black Bear alumni, faculty, staff, and students are among Maine’s most productive innovators and entrepreneurs. In this month’s column, we hear from Colleen Walker, director of UMaine’s Process Development Center (PDC), which has collaborated closely with the pulp and paper industry for decades. The facility was established to support industry needs, read more Coleen Walker Leads the Cutting Edge Research at PDC