Greene County-Greeneville Ems Director Calvin Hawkins Will Retire On November 1st. Hawkins, Who’s Been With The Department For 31 Years, Asked The Ems Board To Support Operations Director Tj Manis As His Successor. Hawkins Says Manis Knows The Job Inside And Out And Is More Than Ready To Take Over. The Decision Now Heads To The Greene County Mayor And County Commissioners For Final Approval.