Mr. Mark E. Muir (born 25 June 1975) USA, is the Senior Administrator for GRG Website Support.

Mark started as a GRG correspondent for the USA. Mark's areas of contributions were greatest, however, in tech support. Mark co-founded the GRG Supercentenarian Forum in 2011 with Robert Douglas Young. In December 2012, Mark was promoted to GRG admin status, following the diagnosis of GRG founder L. Stephen Coles with cancer.

In 2013, Mark became a credited contributor to GRG publications for Rejuvenation Research.

Gerontology Research Group