The role of the Engineer in FIDIC: authority, neutrality and Sub-Clause 3.7

In the Red and Yellow Books the Engineer is the “engine” of the contract. It certifies payments, values variations, and decides on claims and extensions of time. Understanding its role is the foundation of sound contract administration.

Who the Engineer is

The Engineer is appointed by the Employer and acts on its behalf on most matters. It is not an independent contractor, nor a “judge” in the ordinary sense — it is part of the Employer’s team. But this role has a special, critically important mode.

The Engineer’s two “hats”

1. The Employer’s agent. In day-to-day administration (instructions, approvals, control) the Engineer acts in the Employer’s interest, within its authority.
2. The neutral assessor — when making determinations (Sub-Clause 3.7). When the parties have not agreed, the Engineer must act neutrally and reach a fair decision, not one “in favour” of the party that engaged it.

This duality is the source of most conflicts around the Engineer’s role. Knowing which mode it is acting in helps you frame correspondence and claims correctly.

Sub-Clause 3.7 — agreement or determination

The 2017 editions formalised the procedure. For a matter requiring a decision (a claim, the valuation of a variation, an extension of time), there is first a stage of agreement: the Engineer tries to get the parties to agree within a set time. If there is no agreement, the Engineer makes a determination, acting neutrally and within set time limits.

A determination is binding until (and unless) revised by the DAAB or arbitration. Disagreement with a determination opens the path to a dispute under Clause 21.

What the Engineer usually CANNOT do without authority

In the Particular Conditions the Employer often limits the Engineer: for example, requiring prior approval for variations above a certain value. It is important for the Contractor to understand the limits of the Engineer’s authority — an instruction beyond them may be challenged.

There is no Engineer in the Silver Book

Important: there is no Engineer role in the Silver Book — there is an Employer’s Representative who acts in its interest and is not bound to neutral determinations the way the Engineer is in the Red/Yellow. This changes the whole dynamic of claims.

Practical takeaways

• Always record which mode the Engineer is acting in (administration vs determination).
• Check the limits of its authority in the Particular Conditions.
• Observe the Sub-Clause 3.7 time limits — they work both ways.
• When a determination is made, point to the duty of neutrality.

A glossary of key terms is in the Glossary section. Need help with a specific situation involving the Engineer’s role? Write to us.