Diales

Diales is a global expert witness and advisory consultancy serving the construction and engineering industries. Established in 1978, the firm helps clients avoid and resolve disputes and assists the legal profession with arbitration, litigation and alternative dispute resolution. Its people are based across five continents and work internationally.

The firm's expert witness work spans quantum analysis, delay analysis, project management and technical expertise, supported by robust reporting and cross-examination experience. Experts are drawn from senior industry practice, with each holding at least 15 years of practical experience. Advisory assignments cover the project lifecycle, including commercial and contract management, planning and programming, dispute resolution, quantity surveying, building information modeling (BIM) and training.

Diales works across the buildings, energy, infrastructure, marine, mining, oil and gas, process and industrial, and transportation sectors. Teams are shaped around each client's needs, combining international collaboration with locally informed support.