Siam City Cement (Lanka) Limited (INSEE Lanka) has announced the appointment of Eng. Thusith C. Gunawarnasuriya as its new Chief Executive Officer, effective 01 January 2026. He succeeds Nandana Ekanayake, who will continue to serve as Chairman, ensuring leadership continuity and strategic stability for the organisation.
A long-standing contributor to INSEE’s journey, Thusith has worked with the company through its evolution under Holcim (Lanka) Ltd, LafargeHolcim and INSEE, playing pivotal roles that influenced both operational progress and strategic direction.
Rejoining INSEE Lanka in January 2025 as Chief Operating Officer, he has since demonstrated exceptional leadership, driving topline growth, improving EBITDA performance, and strengthening talent development initiatives that enhanced organisational capability and business outcomes.
His expertise in business strategy, operations excellence, and supply chain transformation is well-recognised, supported by over 25 years of multi-industry and multi-country leadership experience. His career includes senior positions at Lion Brewery (Ceylon) PLC, Hemas Manufacturing, Fonterra Brands Lanka, GlaxoSmithKline, MAS Active, and DMS Software Engineering. His international exposure spans India, Bangladesh, and Thailand.
Thusith is a proud alumnus of Dharmaraja College, Kandy, and holds a BSc (Hons) in Electrical & Electronic Engineering from the University of Peradeniya, an MBA from the University of Colombo, and an MSc in Business & Organizational Psychology from Coventry University, UK. He has completed executive leadership programs at IMD (Switzerland) and the National University of Singapore. He is also a member of IEEE (US), CILT (UK), ISMM (Sri Lanka), and IESL (Sri Lanka).
Chairman’s Quote – Nandana Ekanayake:
“Thusith’s deep understanding of our business, strong operational mindset, and proven leadership make him the ideal successor to lead INSEE Lanka into the next phase of growth. His experience within INSEE and across multiple industries, positions him well to deliver on our long-term ambitions and uphold the values that define the organisation.”
CEO’s Quote – Thusith C. Gunawarnasuriya:
“I am honoured to lead INSEE Lanka and deeply grateful for the trust placed in me. INSEE has always been more than a company, it is a family built on shared values, resilience, and a commitment to build the nation responsibly. I look forward to working closely with our teams, customers, partners, and the community as we strengthen our operational excellence, embrace innovation, and drive sustainable growth together.”
With his extensive expertise, proven track record, and forward‑looking leadership approach, Thusith is well positioned to guide INSEE Lanka into its next chapter of performance excellence, innovation, and sustainable growth. The INSEE Lanka team congratulates him and extends their best wishes as he takes on this role.
