1. The United Nations Economic and Social Commission for Western Asia (UNESCWA) is looking for a qualified and experienced firm for the provision of Operation, Maintenance and Repair Services of the Entire Base Building and Interiors, Mechanical-Electrical-Electronic-Plumbing Systems and related Equipment including Water Proofing at the United Nations House, Riad El-Solh Square in Beirut, Lebanon. 2. The Operation and Maintenance services shall include, but not limited to: 2.1 HVAC Systems (heating, ventilation and air-conditioning); 2.2 Electrical Power, UPS, and Generator Power Plants; 2.3 Lifts; 2.4 Fire Alarm System; 2.5 Access Control System (Turnstiles) 2.6 Conference Equipment and Sound Systems; 2.7 Building Management System; 2.8 Public Address System; 2.9 Domestic and Services Water System; 2.10 Sewage System; 2.11 Fire Fighting System; 2.12 Hot Water System; 2.13 Miscellaneous Systems and Equipment; 2.14 Water Proofing; 2.15 Access Control and Physical Security Systems and Equipment