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Derek Sayers

MRICS, MSCL, MIIC Managing Director, Practice Lead- Construction Claims

Derek Sayers is the Managing Director and the Practice Lead for the Construction Claims Group at Haag Canada. Mr. Sayers has over 30 years’ experience as claims professional: project contracts manager, corporate claims manager and commercial specialist. In addition to this, he has built up the brand name and business of consulting firms in Canada since 2016, building solid and enduring relationships with owners, lawyers, and contractors across Canada. As Managing Director, Mr. Sayers leverages his expertise and leadership skills to serve Haag’s clients and expand the market reach of Haag Canada.


  • Quantum Analysis
  • Business Development
  • Commercial and Contracts
  • Corporate Services
  • Dispute Resolution
  • Project Services


  • Royal Institution of Chartered Surveyors, 1992 to Present
  • Society of Construction Law North America, 2018 to Present
  • Speaks fluent English, conversational Spanish and Italian, and basic Indonesian


Haag Canada Quantum Expert & Business Development Manager

2021 to Present

Driver Trett Deputy Country Manager, Quantum Expert, and Business Development Manager

2016 - 2021

Providing in-depth quantum analysis of claims working alongside forensic schedulers. Writing the quantum section of Expert Reports ready for testimony. These reports were successful in enabling the settlement of numerous construction disputes including prolongation, acceleration, disruption, delay and change orders. Responsible for leading Driver Trett Canada to a become a recognized, trusted brand across Canada used by Government, Law Firms, Owners, Contractors and Subcontractors alike for risk management and construction dispute resolution.

Bantrel Project Contracts Manager

2011 - 2015

Multi-billion dollar Surmont 2 Project, one of the largest oil sands SAGD (Steam Assisted Gravity Drainage) Projects in Canada. Advised Board members on methods to reduce risk. Successfully minimized disputes and managed risk. When needed reached mutually agreeable settlement of disputes and avoided further escalation. Managed project contracts department.

Tecnicas Reunidas Corporate Claims Manager

2010 - 2011

Implemented Claims Avoidance Procedures company-wide and in particular on billion dollar plus Refinery Project in early stages of FEED.Provided advice on day-to-day Contract Administration activities on projects and change identification and preparation. Prepared claims for multi-billion dollar Oil, Gas & Power Projects, which included detailed preparation of defense against Liquidated Damages; applications for Extensions of Time; applications for prolongation costs and, delay and disruption analysis and assistance with critical path analysis. Regular liaison with Board members, Legal and Senior Management to advise status of claims, effective mitigation strategies and advise on most effective path forward.