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. About Us: Since 1984, Rabalais Instrument & Electrical Constructors has been meeting and exceeding client expectations on projects ranging from industrial and commercial electrical, instrumentation, and control services to installation, repair, and maintenance services for residential, commercial, and industrial facilities.