Mark Chester
| Position | Company | Year | Company's current rank |
|---|---|---|---|
Acting Chief Executive
|
2019 - 2020 | 84 | |
Chief Executive
|
1997 - 2019 | 48 | |
Chief Executive
|
1993 - 1996 | 87 | |
Chief Executive
|
1990 - 1993 | 106 |