| Title | CEO |
| Start Date | 1990-00-00 |
| End Date | 1998-00-00 |
| Is Current | no |
| Board member | yes |
| Executive | yes |
| Notes | Became president and COO in 1990, then chairman and CEO of Regions Financial Corp. Mackin retired as CEO in 1998 and retired from the board in 2001. |