About Us

History of LSWE

Leong Siew Kwan and Leong Tuck Weng, a Father and Son Tag Team that wrestled the challenges of a contractor providing services to the civil and construction Industry in the late Eighties and built up a strong foundation for Leong Siew Weng Engineering Private Limited (LSWE). Since 1989, the names of these two men has been synonymous with “Getting the Job Done” for their customers and earned LSWE the reputation of being Your Reliable Partner in providing quality engineering solutions in the form of steel works to varied industries – building and construction, marine offshore and subsea , etc.

From small staff strength in a modest workshop at Ang Mo Kio Industrial Park, LSWE has grown to a total workforce of over 200 today at Tuas. In the year 2005, LSWE first forays into the Offshore & Marine sector began with a project awarded by an offshore equipment company for fabrication of skids for mounting cement mixing system on oilrigs, then followed on with another project for building pressure vessels for human occupancy for commercial diving. Since then, LSWE has completed various types of steelwork fabrication and engineering projects to the offshore and marine industries for Diving system, Pressure Vessels, Production and Modular structures.

LSWE formed a Subsea Division in 2013 and was awarded its first contract in 2014 for the supply of a Saturation and Air Diving System. LSWE successfully completed the contract in 2017 which also included the complete interface of the Saturation and Air Diving System into the Diving support vessel by LSWE. The Management team within the LSWE Subsea Division have more than 30 years’ experience within the Subsea Diving Industry and have designed and manufactured over 12 Saturation diving Systems both with inbuild and modular diving systems, including Wet bell systems, Air Diving Systems and Hyperbaric Rescue facilities, and Life Support Packages.

Both initiatives comprise teams of highly experienced and competent team of professionals capable of handling engineering projects with flexibility and the ability to produce timely deliveries by allocating experience resources to manage customers’ projects was required. In every project, we aim to exceed our client’s expectations in every aspect of quality, response time, pricing and delivery. Our dedication to the above has made us one of the most cost-effective and highly respected engineering solution providers locally and regionally. Through the efforts of our talented workforce and excellent infrastructure, we have built a lasting and highly competitive advantage.

List of Accreditation

  • Accredited structural steel fabricator (Category S1) with Singapore Structural Steel Society
  • International Quality Standard ISO9001: 2015 BSI Quality Assurance
  • Occupational Health and Safety Management System BS OHSAS 18001: 2007
  • BizSAFE STAR rating to Workplace Safety & Health (WSH)
  • American Society of Mechanical Engineers (ASME) for the Manufacture of Pressure Vessels (for the use of the symbol “U”, “U2” and “S”)
  • National Board of Boiler & Pressure Vessel Inspectors (NB) for the Repair and/or Alteration of Pressure Vessels and Power Boilers ( for the use of the symbol “R”)
  • Applying the “NB” mark and register boilers, pressure vessels, or other pressure retaining items manufactured in accordance with ASME Stamp(s) with the National Board with its provisions
  • Supplier Member of the International Marine Contractors Association (IMCA) for diving systems in the Asia Pacific region
  • More than 90 types of approved welding procedures under various standards and classification societies.
  • Lloyd’s Register Approved Manufacturers of Fusion Welded Pressure Vessels Class 1


The cornerstone of LSWE’s success and growth has been centered on building a Partnership with her customers – one that is based on Responsiveness and Reliability – two attributes that have placed the Brand LSWE on top with the best in the industry for superior engineering solutions and infrastructure, and also resides in their hearts as the preferred partner.

With a team of technically competent and dedicated management team, LSWE has diversified from being just a construction engineering company to an established firm that provides value engineering solutions and on-time delivery of quality projects to her customers in the building and construction, marine offshore and subsea industries.

People in our workforce are among the best available in the industry.  They are a team of highly trained, skilled and loyal employees, many of whom have recognised technical and professional qualifications in this field.  Continual re-training and upgrading of skills is given to most of the employees to enhance their working abilities.  We believe that only by doing so, we can preserve that competitive edge in the industry and, most importantly, it ensures the most qualified people are handling the projects entrusted to us.

LSWE Expansion

The future of LSWE’s sustained competitiveness depend less on the founders’ personality than on the commitment and quality of the managers, supervisors and workforce. Being Innovative, Competitive, Friendly, Supportive, and Reliable, LSWE has developed a loyal and skilled workforce that produces quality workmanship with safety first in mind.

In view of these expansion plans, LSWE Group will be divided into 3 Strategic Business Units (SBUs):

Civil and Offshore Construction

Diving Systems

Design and Engineering

In the long term, LSWE aims to achieve double digit growth through branding, overseas markets expansions, business partnerships, and building a distinctive brand for total integrated engineering solutions in building and construction, marine offshore & subsea with unique value proposition. It has envisioned to be the Reliable Partner in delivering World Class Value Engineering Solutions and Infrastructures Worldwide.