1. The United Nations is requesting an Expression of Interest (REOI) from competent and qualified vendors for the provision of on-call exterior, core/shell & general construction services at the United Nations Headquarters (UNHQ) New York. 2. The on-call exterior, core/shell & general construction services shall include, but shall not be limited to the following, excavation,concrete (civil) works, demolition, new construction, facade inspection/repairs/cleaning, waterproofing, cladding works, water tank replacement, roof repair/replacement and specialised projects. 3. The contractor shall provide all personnel, equipment, tools, supervision, and other items and services necessary to ensure that the above services are delivered in a timely and efficient manner. 4. The formal solicitation documents for the Request for Proposal (RFP) will be issued later and will outline all technical requirements, including the mandatory technical evaluation criteria. Specific Requirements/Information 5. UNGM registration identifying ‘UN Secretariat’ as a selected agency at minimum, Basic Level, with the understanding that the eventual awardee will be expected to meet Level 2 registration status - for Estimated Contract Award $500,000 and above). 6. The UN reserves the right to issue the final solicitation documents only to those prospective Vendors that respond to the EOI, and are deemed qualified upon completion of an objective evaluation of their submission, or to change or cancel the requirement at any time during the EOI and/or solicitation process. Thus, submitting a reply to this REOI does not automatically guarantee participation in the eventual RFP. 7. The RFP and any subsequent commitment to contract will be issued in accordance with UN rules and regulations.