​2017

​R. Anthony Rolle

2016

​Matthew R. Della Sala and Robert C. Knoeppel

2015

​Lisa Driscoll, Robert Knoeppel, Mathew Della Sala, and Jim Watson

2014

Robert C Knoeppel and Matthew R. Della Sala

​2013

Marilyn Hirth and Edward Eiler

​2012

​Nicola Alexander