Mentor and Visionary of ONYX, Kithsiri is a Civil Engineer qualified from the University of Moratuwa, Sri Lanka, he was involved in a number of Mahaweli Development Projects in Sri Lanka during the early 1970's to the 1980's, he was then affiliated to WH International Construction and was involved in a number of projects in Singapore and Sri Lanka. In 1992 Rohitha with his passion to thrive and succeed in his subject matter expertise, commenced an ambitious journey by initiating his brain child, Interbuild Construction. Since then this niche company has come a long way from its grass roots and has executed a large number of local and international projects, with the affiliation of renowned local and international architects. Today he possess a picturess profile of iconic developments. At ONYX Kithsiri contribute a number of valuable insights and guidance to the young and vibrant board of directors with his decades of experience in management, commitment and attention to detail for perfection, he challenges ONYX associates and subordinates to reach above and beyond their true potential.