Zaheeruddin Consultants (Pvt.) Limited has an extensive clientele such as United States Agency for International Development (USAID), Federal Government of Pakistan, Provincial Governments of Sindh, NWFP, Balochistan, City District Govt. Karachi including Ex-Karachi Water and Sewerage Board, Pakistan Air Force, Pakistan Navy, Karachi Port Trust, Water and Power Development Authority (WAPDA), HEJ Research Institute of Chemistry, University of Karachi, Quetta Development Authority, Malam Jabba Resorts Limited, Pakistan Services Limited, Karachi Properties Investment Limited, PIA Hotels Limited Port Mohammad Bin Qasim Authority, Pakistan Steel, Fauji Foundation Limited, Pakistan Railways, Pakistan Marine Academy, Mari Gas Company Limited, Sui Southern Gas Company Limited, Pakistan Mineral Development Corporation, Cotton Export Corporation Limited, Pakistan Atomic Energy Commission, Pakistan Space and Upper Atmosphere Research Commission (SUPARCO), Pakistan Industrial Development Corporation, Workers Welfare Fund, SIndh Workers Welfare Board, Punjab Workers Welfare Board, Overseas Pakistanis Foundation etc. Besides these ZCL has the vast clientele in private sector also.