Nathaniel Do Amaral Owner 010 492 4300 nathaniel@roc-hd.co.za Sheldon Groenewald Dealer Principal 010 492 4300 Sheldon@roc-hd.co.za Trevor de Jager Workshop Manager/Master Technician 010 492 4300 tech@roc-hd.co.za FELICIA PRETORIUS ADVANCED TECHNICIAN 010 492 4300 Maureen van Zyl Accountant 010 492 4300 accounts@roc-hd.co.za