As an Electronics Engineer, you will need to master following:

• environmental threats
• identify customer's needs

More generally, an electronics engineer is also versed in:

• adjust engineering designs
• approve engineering design
• create technical plans
• design drawings
• design electrical systems
• design electronic systems
• develop electronic test procedures
• electrical testing methods
• electricity
• electricity principles
• electronic test procedures
• electronics
• engineering principles
• environmental legislation
• execute feasibility study
• manage budgets
• mathematics
• mechanics
• perform scientific research
• physics
• types of electronics
• use technical drawing software
• write technical reports

It also helps to know the following:

• abide by regulations on banned materials
• assess supplier risks
• consumer electronics
• create software design
• design user interface
• electromagnetism
• electromagnets
• ensure material compliance
• process customer requests based on the REACh Regulation 1907 2006
• project management
• regulations on substances
• CAD software
• assess financial viability
• design circuit boards
• design integrated circuits
• design microelectromechanical systems
• design microelectronics
• design principles
• design prototypes
• manufacturing processes
• model based system engineering
• perform project management
• perform test run
• product data management
• programmable logic controller
• risk management
• robotic components
• robotics
• use CAD software