Mark Andrew Williamson is an investment adviser representative (IAR) with state registration records since 2005, appearing at 3 firms. Currently registered with KEY INVESTMENT SERVICES LLC.
| Firm | From | To | Current |
|---|---|---|---|
| KEY INVESTMENT SERVICES LLC | 2020-09-01 | present | Yes |
| MORGAN STANLEY DW INC. | 2005-07-29 | 2006-10-02 | — |
| EQUITY SERVICES, INC. | 2005-03-29 | 2005-06-23 | — |