Sezgin Ozbilgin

Director and Head of Delay Expert Services, Asia

Mr. Sezgin Ozbilgin is a testifying Delay Expert with 17 years’ experience in the construction industry, working on a wide range of complex building and infrastructure projects. His expertise lies in on-site practice, specialising in implementing various project control techniques to ensure effective change management on large-scale construction projects and preparing and managing multiple schedules for simultaneous projects.

In his consulting role, Mr. Ozbilgin has provided service to project owners, main contractors, and subcontractors concerning mediation, arbitration and litigation matters across both public and private sectors. He has dealt with diverse delay-related issues in major capital projects, including oil and gas, power, greenfield urban development, subsea pipelines, mining, wastewater processing, utilities infrastructure, solar farms, and transportation infrastructure, and commercial, residential, and technical building projects.

His professional experience extends internationally, including Australia, China, Hong Kong, Macau, Malaysia, Vietnam, Singapore, India, Turkmenistan, Kazakhstan, Turkey, Oman, Qatar, Saudi Arabia, and Romania.

Sezgin has been recognised by Who’s Who Legal as a Future Leader in Construction – Delay and Quantum in 2018, 2019, 2020, and 2021; Construction – Quantum, Delay & Technical in 2023; a National Leader in Southeast Asia Construction Expert Witnesses in 2022 and 2024; and a Global Leader in Construction Expert Witnesses in 2022 and 2023.

WWL says: “Sezgin Ozbilgin impresses market sources with his top-notch technical expertise and persuasive and methodical testimony. Peers further enthuse that his service is second to none”.


BSc in Civil Engineering
MSc in Transportation Engineering

Professional Memberships

Member of the Society of Construction Law (Singapore)
Member of the Singapore Contractor’s Association (SCAL)
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Based in Sydney
Based in London
Based in Manchester
Based in Chicago