Mr Ian de Vaz > WongPartnership LLP > Singapore, Singapore > Lawyer Profile

WongPartnership LLP

Work Department

Litigation & Dispute Resolution Group; International Arbitration Practice; Energy, Projects & Construction Practice; Middle East Practice.


Joint Head – Energy, Projects & Construction Practice; Partner – International Arbitration and Middle East Practices. Adjunct Associate Professor, National University of Singapore.


Ian has a diverse practice in construction and civil engineering work, spanning front-end and dispute resolution work. He has handled a wide spectrum of Singapore’s headline-making project and energy work, including PPP, DBOO, D&B, EPC and EPCM projects for sporting facilities and education institutions, development of mega petrochemical complexes, power plant, solar/clean energy and water facilities infrastructure projects. He is experienced in the drafting, negotiation, preparation and execution on various standard form construction contracts (such as SIA, PSSCOC, REDAS, FIDIC, NEC, JCT and ICE), project management and consultancy agreements, construction-related insurance policies, bonds and guarantees. As a disputes practitioner, he has appeared as lead counsel before the Court of Appeal, the High Court and in international and domestic construction arbitrations involving issues on delay and disruption, extension of time, loss and expense claims, disputed variations, defective works, unforeseen ground and geotechnical conditions, construction insurance claims, performance bonds/guarantees, work suspension and termination of contracts.

Publications – Contributing Editor, Law and Practice of Construction Contracts (5th edition, 2018); Contributing Editor, Singapore Journal of Construction Law (2016-2019); Contributor, Security of Payments and Construction Adjudication (2nd edition, 2012); Contributor, Building and Construction volume of Halsbury’s Laws of Singapore (2019 reissue); Contributor, Singapore Precedents of Pleadings (2006 & 2015 editions).

Matters of significance in which Ian has been involved in include acting/advising for the following:

– A leading Grade A1 contractor in two (consolidated) SIAC arbitrations with claims and counterclaims in aggregate of S$51.3 million arising out of piling and diaphragm wall works for a mass rapid transit tunnelling and station project. Geo-technical engineering issues on how GIII/GIV material should be assessed and measured in turn gave rise to claims for unforeseen ground conditions, concurrent delays and disruptions, extension of time entitlements, loss and expense claims, prolongation costs and variations.

– A leading environmental engineering contractor in an SIAC arbitration with claims and counterclaims in aggregate of S$5.5 million arising out the demolition and construction of an electrical substation and pump house for storm water discharge to serve Changi International Airport. The issues of delay and extension of time touched on whether the Collapsed As-Built or Impacted As-Planned methodologies were more suitable to the factual matrix.

– A leading Korean civil engineering contractor who, upon receipt of a SIAC arbitration award for Rs 161,42,44,497 in respect of civil works and infrastructure project for the National Highways Authority in the State of Madhya Pradesh, India, successfully resisted a long-drawn and complex setting set application at the seat of arbitration in Singapore.

– A leading desalination plant provider in an ICC Arbitration with claims and counterclaims in aggregate of some US$15.9 million for the engineering, construction and commissioning of a desalination plant in Souk Telta, Algeria where breaches of a supply contract, a construction contract and a bridging agreement had to be considered in tandem with a complex interface of different laws, the issue of permits and approvals in Algeria, piping design deficiencies and various time-related claims.

– A leading subcontractor in the Middle East in an ICC Arbitration with claims in the sum of AED 9,643,551.78 for breach of, inter alia, the FIDIC for Works of Civil Engineering Construction, for the design, supply and installation of various precast elements for a project on Yas Island, Abu Dhabi, UAE.

– Jurong Aromatics Corporation Pte. Ltd. in the development of its US$2 billion aromatics project on Jurong Island, Singapore – one of the largest privately-owned petrochemical projects in Singapore and the region – for the production of energy and aromatics products to regional end-users and global downstream producers and traders in the textile and plastics industries. The work spanned many facets including drafting and negotiation of two bespoke EPC contracts, project management and consultancy agreements, the review of an underground storage services agreement for storage of feedstock at the Jurong Rock Cavern storage system.


English, Mandarin.


FCIArb; SCL (Singapore)


Admitted, 1996, Singapore Bar; 2009, Roll of Solicitors of England & Wales; Accredited Adjudicator, 2009, Singapore; University College London (LL.M.).; National University of Singapore (LL.B., Hons.).


Football, fishing and cooking.

Lawyer Rankings

Singapore > Projects and energy: local firms

(Leading individuals)

Ian de VazWongPartnership LLP

WongPartnership LLP advises clients on projects in sectors including renewables, hospitality, commercial property, and data centres. The team handles aspects of projects including financing, development, and procurement, as well as representing clients in arbitration claims. The practice is led by Peng Cheng Tay, who has broad experience in this space, and construction specialist Ian de Vaz. Lesley Tan is also active in both contentious and non-contentious work.

Singapore > Construction: Local firms

WongPartnership LLP‘s Christopher Chuah led team is ‘well equipped with the skill and knowledge in the areas of construction law‘ and is a well-reputed local firm retaining full breadth and depth of contentious and non-contentious capabilities. Chuah is a prominent advocate in landmark construction law cases and arbitral disputes before the highest courts in Singapore and China. The firm is involved in prominent front-end and large infrastructure and PPP projects around the region, such as advising for China Harbour, a major contractor in the S$1.5bn development, and construction of the Integrated Waste Management Facility by the National Environment Agency, on contractual and various construction arrangements. Peng Cheng Tay and Ian de Vaz are highly recommended for disputes while Lay Theng Kua, Lesley Tan, and Linda Low are active on the non-contentious side.

Singapore > Dispute resolution: local firms

WongPartnership LLP‘s comprehensive dispute practice handles a range of contentious work on behalf of government entities, multinational corporates, shareholders, and private individuals across a wide range of practices such as commercial, banking, and white-collar crime. The practice is jointly led by Alvin Yeo, Chee Meng Tan, and Sean Yu Chou and includes Swee Yen Koh, a ‘commercial-minded and tenacious lawyer‘ in high-value commercial and corporate disputes and cases involving fraudulent misconduct, and Melanie Ho, who specialises in criminal investigations. Construction-related litigation is another key area of focus, predominantly handled by Ian de Vaz and Christopher Chuah.