Building cleaning and building maintenance services provide and perform building or facility cleaning and maintenance or repair on a daily, weekly, or ad hoc basis.
Electrical contracting services install and maintain electrical distribution equipment; interior, exterior and municipal lighting; security systems and closed circuit television systems (CCTV); and information technology or IT systems.
Engineering consulting firms provide engineering services and expertise to companies in need of a specialized skill-set. Professionals in this category work with clients to define solutions to problems or to help determine and recommend the best course of action for a given initiative.
General contracting services serve as a single point of responsibility for construction projects. These companies perform layout, scheduling, estimating, and sub-contracting activities. General contractors also complete the construction itself.
Mechanical contracting services include the installation of HVAC equipment, HVAC controls, ducting and any other mechanical equipment incorporated within a building.