I agree with buzzelectric. I started as a maint. elect. 30 yrs. ago. Now am a master/contractor. In between I managed large maintenance trade groups in manufacturing. A good maint. elect. is worth their weight in gold. They need to understand how every piece of manufacturing and facility equipment operates. They need to be able to effectively communicate both written and verbal to all levels of management and ownership. Many times they are called on to assist other trades in troubleshooting because of their broad scope of understanding of the operation. I hired electrical contractors for my pipe and wire. A good maint. guy starts with a license and then it can take years to develop the knack of maintenance repairs and troubleshooting.