When Commissioning Momentum Begins
Major energy projects can employ thousands of people during construction. But as installation work progresses towards completion, the workforce requirements begin to change.
Mechanical installation teams, structural trades and construction supervisors gradually make way for completions engineers, commissioning technicians, systems specialists and start-up personnel.
For professionals looking ahead to their next contract, understanding this transition can be just as valuable as knowing which projects have recently been awarded.
The important question is not simply when construction finishes, but when commissioning activities begin to gather momentum.
Construction Doesn’t End Before Commissioning Begins
One of the biggest misconceptions about major energy projects is that construction finishes completely before commissioning starts.
In reality, the two phases frequently overlap.
A large LNG facility, offshore platform, refinery, power station or data centre may contain hundreds or thousands of individual systems.
As installation work progresses, completed systems can be inspected, tested and progressively handed over for pre-commissioning and commissioning activities while construction continues elsewhere.
This phased approach allows project teams to prepare equipment and systems without waiting for every part of the facility to be completed.
It also means recruitment requirements can change well before the overall construction programme reaches completion.
Mechanical Completion: A Major Recruitment Indicator
Mechanical completion is one of the most important milestones to monitor.
It generally confirms that a defined system or subsystem has been installed and inspected in accordance with the applicable completion requirements, with outstanding items identified and controlled.
Depending on the project, this may involve:
- Installation inspections and quality verification
- Pressure testing and reinstatement
- Electrical installation inspections
- Instrument calibration and loop checks
- Completion dossiers and certification
- Punch-list management
- System walkdowns and handover preparation
The precise boundary between construction, pre-commissioning and commissioning varies between projects.
However, increasing mechanical completion activity is often a strong indication that additional completions and commissioning resources may be required.
Which Roles Become More Important?
As projects move towards commissioning, demand can shift towards a different combination of technical disciplines.
Completions Engineers and Coordinators
Manage system completion status, outstanding work, documentation, certification and handover readiness.
Mechanical Commissioning Technicians
Support equipment inspections, flushing, cleaning, lubrication, alignment, functional testing and preparation of mechanical systems.
Electrical Commissioning Engineers and Technicians
Work on electrical testing, energisation preparation, protection systems, switchgear, transformers and associated equipment.
Instrumentation and Control Specialists
Support loop testing, instrument verification, control-system integration, functional testing and troubleshooting.
Commissioning Supervisors and Managers
Coordinate work fronts, system priorities, resources, interfaces, permits and the safe execution of commissioning activities.
Operations and Start-up Personnel
Become increasingly involved as systems progress towards operational readiness, performance testing and eventual handover.
These requirements do not necessarily appear simultaneously. They depend on the systems being released, the commissioning sequence and the contractor’s mobilisation strategy.
Five Signs a Project May Be Approaching Its Next Recruitment Wave
For candidates and recruiters monitoring major energy developments, several milestones are worth watching.
- Construction Progress and System Completion — Announcements confirming substantial installation progress can indicate that certain areas are moving closer to testing and handover.
- Mechanical Completion Milestones — System walkdowns, completion certification and handover activity suggest that commissioning work fronts are beginning to become available.
- Commissioning Contractor Appointments — The award of specialist commissioning, testing or start-up support contracts can provide a clearer indication of which organisations may require additional personnel.
- Energisation and First System Start-up — Electrical energisation, utilities commissioning and initial equipment operation are important signs that the project is entering a more advanced phase.
- Targeted First Production or Operational Dates — Published start-up targets can help professionals understand the wider programme, although these dates are subject to change and should not be treated as confirmed recruitment schedules.
No single milestone guarantees vacancies. The strongest indicators usually come from several developments considered together.
Why Following the Right Contractor Matters
A major project may have one principal EPC contractor but numerous specialist organisations responsible for different parts of the work.
Construction contractors, completions teams, commissioning specialists, equipment manufacturers and operational support providers may all have separate recruitment responsibilities.
For example, an offshore development approaching commissioning might require mechanical technicians through one contractor, electrical and instrumentation specialists through another, and operational personnel directly through the asset owner.
Understanding the contracting structure can therefore be more useful than simply monitoring the project owner’s job advertisements.
How Candidates Can Prepare Before Vacancies Appear
For professionals considering their next assignment, preparation should begin before a project reaches peak commissioning activity.
Start by identifying developments approaching mechanical completion, testing or operational handover.
Research the contractors responsible for your discipline and understand where the work will be performed.
Make sure your CV clearly demonstrates relevant experience, particularly:
- Systems and equipment previously worked on
- Construction, completions or commissioning responsibilities
- Testing and verification experience
- Industry-specific qualifications and certifications
- Previous project sectors and locations
- Current availability and willingness to mobilise
A CV that clearly communicates practical project experience is easier for recruiters to assess against a specific technical requirement.
The Opportunity Is in Understanding the Project Timeline
Major energy projects do not move from construction to operations overnight.
They progress through overlapping stages of installation, inspection, mechanical completion, pre-commissioning, commissioning, start-up and handover.
Each stage can create different workforce requirements.
For candidates, recognising these transitions can help identify potential opportunities before they become widely advertised.
For recruiters, understanding the project lifecycle can help anticipate changing technical skill requirements and identify where specialist resources may be needed.
The next recruitment wave does not necessarily begin when construction ends. It often starts when the first systems are ready to be handed over.