Mechanical & Piping Site Supervisor – Water & Environmental Projects (NL/FR/ENG)

We are looking for a Mechanical & Piping Site Supervisor who will support the delivery of multidisciplinary EPC projects within the water, wastewater, environmental, energy, and sustainable infrastructure sectors.

You will be involved from construction through commissioning and project handover, supervising the installation, testing, and commissioning of mechanical equipment, piping systems, valves, steel structures, and electro-mechanical installations. The role combines site supervision, technical coordination, quality control, supplier follow-up, and commissioning support to ensure successful project delivery.

Projects may include drinking water treatment plants, wastewater treatment and water reuse facilities, process water installations, pumping stations, hydraulic infrastructure, sustainable energy facilities, waste-to-energy plants, hydrogen infrastructure, and industrial utility installations.

This position combines office-based work, home office, and regular presence on project sites throughout Belgium.

Engineering & Technical Coordination

• Coordinate and follow up piping and mechanical engineering activities during project execution

• Review technical documentation, drawings, specifications, and supplier documentation

• Identify technical conflicts and coordinate practical solutions during construction

• Coordinate interfaces between mechanical, process, civil, electrical, and instrumentation disciplines

• Support constructability reviews and ensure installation activities align with project requirements

• Follow up detailed engineering deliverables including piping layouts, supports, stress considerations, and installation requirements

Procurement & Supplier Coordination

• Support technical evaluations of suppliers and subcontractors

• Review technical offers and verify compliance with project requirements

• Coordinate technical approvals and supplier documentation

• Follow up fabrication progress and equipment delivery schedules

• Participate in Factory Acceptance Tests (FATs) when required

• Ensure corrective actions are implemented and properly documented

Construction & Site Execution

• Supervise daily site activities related to mechanical equipment and piping installations

• Coordinate subcontractors and site teams

• Monitor installation progress against project schedules

• Ensure works are executed according to approved drawings, specifications, and procedures

• Verify site readiness before installation activities commence

• Resolve technical and operational issues arising during project execution

• Monitor site productivity and contribute to planning optimization

Quality Assurance & Compliance

• Ensure compliance with QA/QC requirements and project procedures

• Monitor welding activities, inspections, pressure testing, and mechanical completion activities

• Ensure compliance with PED requirements and applicable standards

• Identify, track, and close non-conformities

• Participate in inspections, testing activities, and punch-list management

• Ensure all quality documentation is properly maintained and completed

Start-Up & Commissioning

• Support pre-commissioning and commissioning activities

• Coordinate mechanical completion and system handover activities

• Assist with troubleshooting during start-up phases

• Ensure commissioning documentation and turnover dossiers are completed

• Support operational readiness activities where required

Cost & Schedule Control

• Monitor project progress against schedules and budgets

• Identify potential delays, risks, and mitigation measures

• Support the management of variations and change requests

• Contribute to project reporting and progress tracking

• Assist in monitoring subcontractor performance and contractual obligations

Education

• Bachelor’s degree in Mechanical Engineering, Electro-Mechanical Engineering, or equivalent through experience

Experience

• Minimum 5 years of experience within mechanical and piping installation projects in water treatment, wastewater treatment, environmental, industrial, or process industries

• Experience supervising subcontractors and coordinating site activities

• Experience with commissioning and start-up activities is considered a strong asset

• Experience within EPC project environments is preferred

Technical Expertise

• Strong knowledge of industrial piping systems and mechanical equipment installation

• Good understanding of welding procedures, pressure testing, and quality control requirements

• Familiarity with PED requirements and applicable international standards

• Basic knowledge of hydraulics, electrical systems, and instrumentation

• Experience within water treatment, environmental infrastructure, or industrial process projects is considered an asset

Personal Competencies

• Strong coordination and communication skills

• Hands-on and solution-oriented mindset

• Ability to manage multiple stakeholders and priorities

• Strong focus on quality, safety, and project delivery

• Team player with a proactive approach

Languages

• Fluent in Dutch, French, and English

• Knowledge of all three languages is required

• Hybrid working arrangement: 3 days on site/office and 2 days home office

• Regular travel to project sites across Belgium

• Occasional travel to suppliers, fabrication facilities, and Factory Acceptance Tests (FATs)

• Flexibility to spend extended periods on site during critical construction, commissioning, and start-up phases