Samwoh was incorporated in Singapore as a transport and logistics company by three lorry drivers in 1975. Its business started developing in the 1980s when it secured a few sizeable transportation and logistics projects from the Housing and Development Board and also the Public Works Department. The company then invested in an asphalt batching plant and expanded on its asphalt premix supply and laying services.

Today, the company has grown from its humble beginnings into a market leader in construction and maintenance of road, airport and seaport pavement. Samwoh is also at the forefront of providing civil engineering and infrastructure construction services, supply of green building materials, provision of specialised blasting systems, geotechnical services, recycling of construction and industrial wastes and consultancy services. The concept of a “one-stop solution” has helped to differentiate Samwoh from other companies.

As a company that prides itself on innovation and sustainable development, Samwoh's latest achievement, the Samwoh Eco-Green Building, was awarded the Building & Construction Authority Green Mark Award (Platinum), the top environmental award for buildings in Singapore. The landmark building lays claim to being the first building in the region to be constructed using up to 100% Recycled Concrete Aggregate in its concrete. The building is open to the public by appointment, and has already seen over 4,000 visitors from around the world since its opening in 2010.

Samwoh has won several awards for its business performance as well as green initiatives. It came in first in the Enterprise 50 Awards (2009 & 2010), marking the first time a construction company has won this award consecutively. It also received Top Achiever for the Singapore Environmental Achievement Award 2010, Green Champion for the Singapore Compact CSR Award 2011, BCA-SGBC Green Innovator of the Year (2011), and most recently, Most Eco-Friendly Transport Partner in the Land Transport Excellence Awards 2012.