The company's operations commenced with DESB in 1980 whose initial business was the trading of hardware materials and supply of manpower for the offshore oil and gas industry.

This was however expanded to include provisioning of maintenance services, fabrication operations, hook-up and commissioning and charter of marine vessels.

Since its inception, the company has been awarded with numerous contracts including those by Petronas Carigali, Sarawak Shell Berhad and ExxonMobil.

Inline with its emphasis on quality, DESB has maintained ISO 9001 certification since its initial accreditation in 1999. This ongoing commitment is currently evidenced by its ISO 9001:2015 Quality Management System certification, certified by SIRIM QAS International Sdn Bhd from June 2017 to the present.

Dayang has maintained a good safety track records. Dayang has received numerous awards from Petronas Carigali, Sarawak and Sabah Shell, JX Nippon Oil & Gas, Murphy Oil, KPOC, PTTEP, REPSOL and SEA Hibiscus, is widely recognized as a reputable provider of maintenance and support services within the Oil & Gas industry.