Desirable examples include but are not limited to: mechanical or electrical construction, mobile mechanical services, industrial maintenance or construction, site-based facilities services or the associated trades (electricians, plumbers, pipefitters, welders, sprinkler fitters, sheet metal, HVAC, building maintenance etc.), manufacturing, military or other deployable skilled labor force. EMCOR companies plan, install, operate, maintain, and protect the sophisticated and dynamic systems that create facility environments-such as electrical, mechanical, lighting, air conditioning, heating, security, fire protection, and power generation systems-in virtually every sector of the economy and for a diverse range of businesses, organizations, and government.