Installation electrician - installing power systems, lighting, fire protection, security and data-network systems in all types of buildings Maintenance electrician - checking systems regularly to make sure that they are working efficiently and safely Electro technical panel builders - building and installing control panels that operate the electrical systems inside buildings Machine repair and rewind electrician - repairing and maintaining electrical motors and other machinery like transformers to make sure that they work correctly Highway systems electrician - installing and maintaining street lighting and traffic management systems that tell the public what they need to know when they’re on the roads and motorways.