Dhammika Jayawardene
Chairman & Founder
BSc (Hons) Civil Eng, MICE, FIEng
Who We Are
Built on
35 Years of Delivery
From regional roads contractor to national infrastructure powerhouse — our story is written in kilometres of highway and millions of cubic metres of concrete.
Our Foundation
Engineering Sri Lanka's Future
Cornerstone Group was founded in 1989 by a trio of civil engineers with a singular ambition: to build infrastructure that would serve Sri Lanka for generations. Beginning with small road rehabilitation contracts in the Western Province, the company grew methodically — never pursuing scale at the expense of quality or safety.
By the late 1990s, Cornerstone had secured its first national infrastructure mandate — the reconstruction of the Kelani Valley road network following severe floods. That project established our reputation for crisis-response capability and earned us our first government framework contract.
Today, Cornerstone Group operates across all nine provinces of Sri Lanka, with a permanent workforce of over 1,800 and a plant fleet valued at LKR 12 billion. We are a preferred contractor for the Road Development Authority, the National Water Supply & Drainage Board, and multiple multilateral development bank-funded programmes.
Our History
Milestones
1989
Founded in Colombo
Three civil engineers incorporate Cornerstone Group (Pvt) Ltd. First project: road rehabilitation in Gampaha District.
1995
First Major Government Contract
Awarded a LKR 280M contract for Kelani Valley road network reconstruction, establishing government credentials.
2001
ISO 9001 Certification
Cornerstone becomes one of the first civil contractors in Sri Lanka to achieve ISO 9001 quality management certification.
2006
Bridge Division Launched
Formation of a dedicated bridge engineering division following successful delivery of the Deduru Oya Bridge project.
2011
Southern Expressway Contractor
Selected as primary civil works contractor for a 42km section of the Southern Expressway — our largest project to date at the time.
2015
LKR 1B Annual Turnover Milestone
Cornerstone Group crosses the LKR 1 billion annual revenue milestone for the first time.
2019
ISO 14001 & OHSAS 18001
Triple certification achieved as environmental and occupational health management systems are independently accredited.
2024
Northern Highway Phase III
Awarded largest single contract in company history: Northern Highway Phase III at LKR 8.4B.
Leadership
Board & Executive Team
Priyantha Wijesinghe
Managing Director
MEng Civil Eng, MRICS, CENG
Samanthika de Silva
Director – Operations
BSc Structural Eng, PgD Project Mgmt
Ruwan Perera
Director – Finance & Strategy
FCA, ACMA, MBA (Finance)
Safety First
Zero Harm.
No Exceptions.
Our SafeFirst management framework is not a compliance checklist — it is a lived culture. Every Cornerstone employee, subcontractor, and site visitor operates under our mandatory safety induction, and every project has a dedicated Safety Officer with full authority to halt work where required.
0 Fatalities (Last 5 Years)
99.2% Safety Audit Pass Rate
OHSAS 18001 Certified
ISO 45001 Compliant
What We Stand For
Our Values
Integrity
We honour our commitments to clients, communities, and colleagues. No project and no deadline is worth compromising our honesty.
Safety
Every person on our sites returns home healthy. Safety is non-negotiable at every level of the organisation.
Excellence
We do not settle for adequate. From specification compliance to finish quality, we pursue excellence in everything we build.
Sustainability
Infrastructure should serve future generations. We integrate environmental management into every stage of every project.
Community
We actively engage with the communities our projects serve — employing locally, investing in skills, and minimising disruption.
Innovation
We invest in technology, research, and modern construction methods to deliver smarter, faster, and more durable outcomes.