According to the FIDIC (International Federation of Consulting Engineers) terms and conditions, the Contract Engineer has a key role in managing the construction project and in resolving any disputes between the contracting parties. The FIDIC conditions set out a number of tasks and responsibilities for the Contract Engineer, including:

1. Supervision of contractors: The Contract Engineer supervises the activities of the contractors, monitors the progress of the work and ensures that the schedule and quality standards are met.
2. Coordination of activities: Construction supervision coordinates the cooperation between the various parties involved in the construction process, such as architects, engineers, contractors, etc.
3. Dispute resolution: The Contract Engineer is authorised to settle any disputes between the contracting parties, including disputes concerning the quality of performance, deadlines or payment.
4. Documentation and reporting: The Contract Engineer maintains records related to the progress of work, changes to the project and dispute resolution. He reports regularly to the developer on the status of the project.
5. Payment approval: The Contract Engineer approves payments to the contractors for the completed works, once they have been approved and checked for compliance with the contract.
6. Technical supervision: The Contract Engineer provides technical oversight of the entire construction project, ensuring compliance with design requirements and technical standards.
7. Change management: The Contract Engineer is responsible for managing changes to the project, including negotiating and approving changes to the scope of work, cost and schedule.

The FIDIC conditions provide the overall structure of construction contracts and define the roles and responsibilities of the various parties in the project delivery process. The FIDIC Conditions Contract Engineer is critical to effectively managing a construction project and ensuring its success.