As a Commissioning Engineer, you will need to master following:

• ensure public safety and security
• project commissioning
• test performance of power plants

More generally, a commissioning engineer is also versed in:

• analyse test data
• check system parameters against reference values
• collaborate with engineers
• conduct quality control analysis
• ensure conformity to specifications
• ensure fulfilment of legal requirements
• liaise with quality assurance
• present reports
• quality assurance procedures
• quality standards
• read standard blueprints
• record test data
• safety engineering
• troubleshoot
• use measurement instruments
• use testing equipment
• write work-related reports

It also helps to know the following:

• follow nuclear plant safety precautions
• fossil-fuel power plant operations
• geothermal power plant operations
• power plant instrumentation
• project management
• hardware testing methods
• maintain nuclear reactors
• monitor nuclear power plant systems
• nuclear energy
• perform project management
• test materials
• test procedures
• test sensors