Commissioning engineer


Commissioning engineers supervise the final stages of a project when systems are installed and tested. They inspect the correct functioning of the equipment, facilities and plants to make sure they meet the requirements and specifications. They perform the necessary verifications and give approval to finalise the project.

Other titles

The following job titles also refer to commissioning engineer:

Minimum qualifications

Bachelor’s degree is generally required to work as commissioning engineer. However, this requirement may differ in some countries.

ISCO skill level

ISCO skill level is defined as a function of the complexity and range of tasks and duties to be performed in an occupation. It is measured on a scale from 1 to 4, with 1 the lowest level and 4 the highest, by considering:

  • the nature of the work performed in an occupation in relation to the characteristic tasks and duties
  • the level of formal education required for competent performance of the tasks and duties involved and
  • the amount of informal on-the-job training and/or previous experience in a related occupation required for competent performance of these tasks and duties.

Commissioning engineer is a Skill level 4 occupation.

Commissioning engineer career path

Similar occupations

These occupations, although different, require a lot of knowledge and skills similar to commissioning engineer.

test engineer
dismantling engineer
maintenance and repair engineer
quality engineer
quality services manager

Long term prospects

These occupations require some skills and knowledge of commissioning engineer. They also require other skills and knowledge, but at a higher ISCO skill level, meaning these occupations are accessible from a position of commissioning engineer with a significant experience and/or extensive training.

Essential knowledge and skills

Essential knowledge

This knowledge should be acquired through learning to fulfill the role of commissioning engineer.

Quality assurance procedures: The procedures to inspect a product or system to ensure that it is according to specifications and requirements.
Project commissioning: Process of supervising the correct functioning of systems, buildings or plants during the final stages before deployment.
Quality standards: The national and international requirements, specifications and guidelines to ensure that products, services and processes are of good quality and fit for purpose.
Safety engineering: The engineering discipline used to ensure that systems, machines and equipment work according to the set safety standards and laws, such as environmental law.

Essential skills and competences

These skills are necessary for the role of commissioning engineer.

Record test data: Record data which has been identified specifically during preceding tests in order to verify that outputs of the test produce specific results or to review the reaction of the subject under exceptional or unusual input.
Troubleshoot: Identify operating problems, decide what to do about it and report accordingly.
Conduct quality control analysis: Conduct inspections and tests of services, processes, or products to evaluate quality.
Ensure public safety and security: Implement the relevant procedures, strategies and use the proper equipment to promote local or national security activities for the protection of data, people, institutions, and property.
Read standard blueprints: Read and comprehend standard blueprints, machine, and process drawings.
Use testing equipment: Use equipment to test performance and operation of machinery.
Test performance of power plants: Analyse the performance of power plants by operating the plant at maximum output for a predetermined period of time so guaranteed performance can be established and legal quality requirements can be verified.
Analyse test data: Interpret and analyse data collected during testing in order to formulate conclusions, new insights or solutions.
Write work-related reports: Compose work-related reports that support effective relationship management and a high standard of documentation and record keeping. Write and present results and conclusions in a clear and intelligible way so they are comprehensible to a non-expert audience.
Collaborate with engineers: Work closely and communicate with engineers on designs or new products.
Liaise with quality assurance: Work closely with the relevant quality assurance or grading party involved.
Ensure fulfilment of legal requirements: Ensure that all legal requirements are met.
Check system parameters against reference values: Make sure that the measurable factors which define the operation of a system correspond to the predetermined norms.
Use measurement instruments: Use different measurement instruments depending on the property to be measured. Utilise various instruments to measure length, area, volume, speed, energy, force, and others.
Present reports: Display results, statistics and conclusions to an audience in a transparent and straightforward way.
Ensure conformity to specifications: Ensure that the assembled products are conform to the specifications given.

Optional knowledge and skills

Optional knowledge

This knowledge is sometimes, but not always, required for the role of commissioning engineer. However, mastering this knowledge allows you to have more opportunities for career development.

Geothermal power plant operations: The different steps in the production of electricity from geothermal energy and the function of all the components of the required equipment such as pumps, compressors, heat exchangers and turbines.
Hardware testing methods: Those processes in which hardware components or systems are tested, such as the system test (ST), the ongoing reliability test (ORT), and the in-circuit test (ICT).
Project management: Understand project management and the activities which comprise this area. Know the variables implied in project management such as time, resources, requirements, deadlines, and responding to unexpected events.
Power plant instrumentation: The equipment and instruments used for the monitoring and controlling processes in power plants. This requires proper operation, calibration, and regular maintenance.
Nuclear energy: The generation of electrical energy through the use of nuclear reactors, by converting the energy released from nuclei of atoms in reactors which generate heat. This heat subsequently generates steam which can power a steam turbine to generate electricity.
Fossil-fuel power plant operations: The different steps in the production of electricity using fossil fuels and the function of all the components of the required equipment such as boilers, turbines and generators.
Test procedures: The methods for producing results in science or engineering, such as physical tests, chemical tests, or statistical tests.

Optional skills and competences

These skills and competences are sometimes, but not always, required for the role of commissioning engineer. However, mastering these skills and competences allows you to have more opportunities for career development.

Test materials: Test the composition, characteristics, and use of materials in order to create new products and applications. Test them under normal and extraordinary conditions.
Maintain nuclear reactors: Repair and perform routine maintenance on equipment which controls nuclear chain reactions to generate electricity, ensure that the equipment functions safely and compliant with legislation.
Follow nuclear plant safety precautions: Comply with nuclear power plant safety procedures, policies and legislation to ensure a safe working environment for all employees, and to ensure the safety of the public.
Test sensors: Test sensors using appropriate equipment. Gather and analyse data. Monitor and evaluate system performance and take action if needed.
Monitor nuclear power plant systems: Control nuclear plant systems, such as ventilation and water draining systems, to ensure proper functioning and identify irregularities.
Perform project management: Manage and plan various resources, such as human resources, budget, deadline, results, and quality necessary for a specific project, and monitor the project’s progress in order to achieve a specific goal within a set time and budget.

ISCO group and title

2149 – Engineering professionals not elsewhere classified





  1. Commissioning engineer – ESCO
Last updated on August 8, 2022

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