Ir Ts Thomas Ong

Ir Ts Thomas Ong is a Delay Expert and forensic delay analyst with more than 23 years of experience in programme planning, forensic delay analysis and extension of time assessments. He provides independent delay analysis, expert reporting and dispute resolution support on major infrastructure, rail, marine and building projects, helping clients navigate complex delay, disruption and entitlement issues across arbitration and other formal dispute resolution proceedings.

Thomas has developed particular expertise in forensic delay analysis, extension of time assessments, programme planning and scheduling, and the preparation of delay expert reports for arbitration and other dispute resolution forums. He has been involved in some of Malaysia’s most significant projects, including MRT2, LRT3, PNB 118 (Merdeka Mall) and numerous large-scale residential, commercial and infrastructure developments.

Over the past several years, Thomas has focused extensively on forensic delay analysis and expert support services. He has acted as a Party-Appointed Delay Expert and Expert Assistant on disputes involving offshore works, transport infrastructure, ports, residential developments, rail projects and international construction projects. His work combines technical programming expertise with a practical understanding of project delivery, allowing him to provide clear and well-supported opinions on delay causation, entitlement and project impact.

Beyond his expert appointments, Thomas serves as Lead Forensic Delay Analyst at Plus Three Consultants, where he supports clients on complex delay and disruption matters across arbitration, litigation and other dispute resolution proceedings. He is also a regular speaker on forensic delay analysis and extension of time claims, recognised for his ability to translate complex scheduling issues into clear and practical insights.