Greg Anderson is one of the co-maintainers of Drush; he is the original author of site aliases and the sql-sync command. You can follow him at http://twitter.com/greg_1_anderson.

Jonathan Araña Cruz has been a sysadmin since early 2000 and has been involved with Drupal since 2006, when a site built by others fell in his hands. At present, he combines both sysadmin and Drupal development work. He has published some modules to aid migration from other CMS options to Drupal. He regularly contributes patches to modules he works with. At a point in time, he found Drush and saw a lot of possibilities in the management of Drupal from the command line. So, he started to contribute patches to improve Drush. Since 2010, he has been an official co-maintainer of the project.

Jonathan's Drupal profile can be found at http://drupal.org/user/49817.