Introduction
A major energy project can take years to move from concept to full operation.
But recruitment doesn’t happen all at once.
Different skills are required at different stages of a project — from engineering and procurement through construction, mechanical completion, commissioning, start-up and finally operations.
For energy professionals, understanding where a project is in its lifecycle can provide an important clue about the types of roles that may be required next.
Whether you work in oil & gas, LNG, offshore wind, power generation, hydrogen, petrochemicals or major industrial projects, understanding these phases can help you follow projects earlier and prepare for potential opportunities before they reach peak recruitment.
The Energy Project Lifecycle
Although every project is different, a typical major energy development may progress through: Concept & FEED → Detailed Engineering → Procurement & Fabrication → Construction → Mechanical Completion → Pre-Commissioning → Commissioning → Start-Up & Handover → Operations & Maintenance.
The workforce changes significantly as the project moves through these stages.
Here’s what that can mean for recruitment.
1. Concept, Design & FEED
Before anything is constructed, a project must be defined technically and commercially.
During Concept and Front-End Engineering Design (FEED), engineering teams establish what will be built, how systems will operate and what will be required to deliver the project safely and economically.
Roles involved can include:
- Process Engineers
- Mechanical Engineers
- Electrical Engineers
- Instrumentation & Control Engineers
- Piping Engineers
- Civil & Structural Engineers
- Project Engineers
- HSE Engineers
- Cost Engineers
- Planning Engineers
- Project Controls specialists
What FEED Means for Candidates
At this stage, recruitment is generally weighted towards engineering, design, planning and project management expertise rather than large construction workforces.
But this is also an important stage to watch.
A project progressing successfully through engineering can eventually create much larger recruitment requirements when procurement and construction begin.
2. Procurement & Fabrication
Once engineering advances, attention begins turning towards the equipment, materials and systems required to build the facility.
Major packages may include:
- Compressors
- Pumps
- Turbines
- Electrical switchgear
- Transformers
- Control systems
- Instrumentation
- Valves
- Structural steel
- Piping
- Process equipment
Fabrication and International Supply Chains
Fabrication may also begin at yards and manufacturing facilities around the world.
Potential roles include:
- Procurement Specialists
- Package Engineers
- Expeditors
- QA/QC Engineers
- Inspectors
- Vendor Coordinators
- Supply Chain professionals
- Welding Inspectors
- Fabrication Supervisors
Opportunities Beyond the Final Project Location
This stage can create opportunities well beyond the project’s final location because equipment and modules may be manufactured internationally.
3. Construction — When Workforce Requirements Grow
Construction is where recruitment can increase significantly.
Sites begin mobilising larger multidisciplinary teams to turn engineering designs into a working facility.
Mechanical Construction Roles
Typical mechanical construction disciplines include:
- Mechanical Technicians
- Mechanical Fitters
- Pipefitters
- Welders
- Platers
- Mechanical Supervisors
- Rotating Equipment specialists
Electrical Construction Roles
Typical electrical construction disciplines include:
- Electricians
- Electrical Technicians
- HV/LV specialists
- Cable Technicians
- Electrical Supervisors
Instrumentation Construction Roles
Typical instrumentation construction disciplines include:
- Instrument Technicians
- Instrument Fitters
- Control Systems Technicians
- E&I Technicians
- Instrument Supervisors
Lifting & Access Roles
Typical lifting and access disciplines include:
- Riggers
- Crane Operators
- Lifting Supervisors
- Appointed Persons
- Scaffolders
- Rope Access Technicians
Project Support During Construction
Project support roles commonly include:
- Construction Managers
- Construction Supervisors
- QA/QC Inspectors
- HSE Advisors
- Planners
- Material Controllers
- Document Controllers
- Project Controls personnel
Why Construction Is a Peak Recruitment Phase
For many major projects, construction represents one of the largest workforce phases.
4. Mechanical Completion — The Project Begins to Change
This is where things become particularly interesting from a recruitment perspective.
As construction progresses, individual systems and equipment begin reaching mechanical completion.
The question changes from “Has it been built?” to “Has it been built correctly, inspected and documented sufficiently to move towards testing and commissioning?”
Activities may include:
- System walkdowns
- Punch listing
- Completion checks
- Inspection
- Documentation verification
- Systemisation
- Test pack completion
- Handover preparation
Roles Involved in Mechanical Completion
Relevant personnel can include:
- Completion Engineers
- Mechanical Completion Engineers
- QA/QC Inspectors
- E&I Inspectors
- Completions Coordinators
- Punch List Coordinators
- System Engineers
- Commissioning Engineers
Why Candidates Should Understand Mechanical Completion
Mechanical completion experience is already one of the skills highlighted within Energy Recruitment Hub’s existing Commissioning Engineer guidance.
Mechanical completion is effectively the bridge between construction and commissioning.
As construction activity begins reaching completion, demand can start shifting towards personnel capable of verifying, testing and preparing systems for operation.
5. Pre-Commissioning
Before systems can be fully commissioned, they need to be prepared and tested.
Pre-commissioning activities vary considerably by system and project but can include:
- Cleaning and flushing
- Pressure testing
- Electrical testing
- Cable testing
- Instrument calibration
- Loop checking
- Motor testing
- Equipment alignment
- System checks
- Functional verification
Pre-Commissioning Roles
This can create demand for technically experienced personnel who understand both the equipment and the commissioning process.
Roles may include:
- Commissioning Technicians
- Mechanical Technicians
- Electrical Technicians
- Instrument Technicians
- E&I Technicians
- Commissioning Engineers
- System Engineers
- QA/QC personnel
Instrumentation Skills in Pre-Commissioning
Instrumentation professionals, for example, may bring skills such as calibration, control valves, DCS/PLC knowledge, diagnostics and loop checking — all areas already covered within Energy Recruitment Hub’s Instrument Technician guidance.
6. Commissioning — Bringing the Facility to Life
Construction creates the facility.
Commissioning proves that it works.
Systems are progressively tested and verified to demonstrate that they operate safely and according to design.
Commissioning activities can include:
- System and subsystem testing
- Functional testing
- Cause & effect testing
- Electrical energisation
- Control system testing
- Equipment run testing
- Safety system verification
- Punch list closeout
- Handover documentation
- Start-up preparation
Typical Commissioning Roles
Typical roles include:
- Commissioning Technicians
- Commissioning Engineers
- Electrical Commissioning Engineers
- Instrument Commissioning Engineers
- Mechanical Commissioning Engineers
- Commissioning Leads
- Commissioning Managers
- System Owners / System Engineers
- Completions personnel
Why Commissioning Experience Can Be Valuable
Energy Recruitment Hub’s existing Commissioning Engineer guide highlights mechanical completion, systemisation, functional testing, cause-and-effect testing, punch-list management and start-up support as important areas of commissioning experience.
Commissioning professionals often work across different industries because the fundamental challenge is similar: take a newly constructed or modified system and prove that it is ready for safe operation.
That makes commissioning experience potentially transferable across oil & gas, LNG, power, offshore wind, hydrogen, industrial facilities and data centres.
7. Start-Up & Handover
Commissioning eventually moves into one of the most critical project stages: starting the facility.
Equipment and systems begin operating under real process conditions.
The workforce increasingly combines commissioning specialists with the operations personnel who will ultimately run the asset.
Roles can include:
- Start-Up Engineers
- Commissioning Engineers
- Operations Engineers
- Control Room Operators
- Process Operators
- Electrical Technicians
- Instrument Technicians
- Mechanical Technicians
- Reliability personnel
- Maintenance teams
- HSE professionals
Knowledge Transfer at Handover
Knowledge transfer becomes particularly important.
The project is moving from something that has been built into something that must now be operated safely and reliably.
8. Operations & Maintenance — The Long-Term Workforce
Once the project has successfully started and been handed over, the workforce changes again.
Large temporary construction and commissioning teams reduce while permanent or long-term operations and maintenance teams take responsibility for the facility.
Typical careers include:
- Production Operators
- Process Technicians
- Mechanical Technicians
- Electrical Technicians
- Instrument Technicians
- Maintenance Supervisors
- Reliability Engineers
- Rotating Equipment specialists
- Inspection personnel
- HSE professionals
- Maintenance Planners
- Operations Managers
Shutdowns, Modifications and Ongoing Project Work
These roles can remain throughout the operational life of the asset.
And the cycle doesn’t necessarily stop there.
Operational facilities require maintenance campaigns, modifications, upgrades and shutdowns — which can create new periods of project recruitment. Energy Recruitment Hub’s existing shutdown guide shows how these events can require multidisciplinary teams including mechanical, electrical, instrumentation, QA/QC, HSE, planning and commissioning personnel.
Why Project Phase Matters When Looking for Your Next Role
A common mistake is to look only at which projects exist.
A better question is: what stage has the project reached?
A project in early engineering may require completely different people from the same project two years later during construction.
Likewise, a project approaching mechanical completion may begin increasing its requirement for completions and commissioning expertise while construction recruitment starts changing.
Understanding project phases can therefore help professionals identify where their skills fit today — and where they could be needed next.
Follow the Project Before You Follow the Vacancy
Waiting until a vacancy appears means you’re seeing the recruitment process near the end.
Following projects earlier can give you more context.
Look at:
- What is being built?
- Where is it being built?
- Which phase is it currently in?
- Who is developing it?
- Which contractors are involved?
- What skills will the next phase require?
Career Intelligence From Project Tracking
That doesn’t guarantee recruitment — projects change, schedules move and contracting strategies differ.
But it gives you something much more useful than guessing.
It gives you career intelligence.
Where Could Your Skills Fit?
A single major energy project can require hundreds of different skills across its lifecycle.
An engineer involved during FEED. A rigger supporting construction. An inspector completing system walkdowns. An Instrument Technician carrying out loop checks. A Commissioning Engineer performing functional testing. An operator eventually running the facility.
Different people. Different stages. One project lifecycle.
Understanding where your experience fits can help you identify relevant projects, Career Pathways and future opportunities.
Explore Energy Recruitment Hub
Project Finder — Follow major energy projects and understand where future opportunities may develop.
Career Pathways — Explore roles, progression routes, certifications and related careers.
Skills — Understand how individual technical skills connect across roles and industries.
Jobs — Browse current energy vacancies and see where companies are recruiting today.
Upload your CV — Make your experience visible for relevant opportunities.
Final Thoughts
Major energy projects don’t suddenly begin recruiting when construction starts.
Their workforce evolves over time.
Engineering creates the design. Procurement secures the equipment. Construction builds the facility. Mechanical completion verifies it. Commissioning proves it works. Operations keeps it running.
For energy professionals, understanding that lifecycle can provide a much clearer picture of where opportunities come from — and what could come next.
And that’s exactly the kind of intelligence Energy Recruitment Hub is designed to help professionals develop.