| Company | Timeline | Status | |
| DSM Estates Limited Director • Consultant Surgeon | 5 May 2011←14 Years→Current | Active | |
Midland Scoliosis Service Limited Director • Consultant Surgeon | 9 Oct 2007←6 Years→6 May 2014 | Dissolved | |
Midland Scoliosis Service Limited Secretary • Consultant Surgeon | 9 Oct 2007←6 Years→6 May 2014 | Dissolved | |
| D.S. Marks Limited Director • Consultant Surgeon | 25 Nov 1998←26 Years→Current | Active | |
