In this paper we elaborate on the use of needs analysis in the development and delivery of English for Specific Purposes (ESP). ESP has its goal in equipping a learner with the required English skills necessary to a particular profession or an academic discipline. The importance of placing the learners’ languages, communicative, and contextual needs towards the center stage is analyzed. This will consequently make the relevant teaching materials more applicable and useful. The author presents several ways of gathering data for needs analysis including surveys, interviews, and even corpus analysis and observations. The techniques of using authentic materials such as task-based and targeted skills lessons are some of the other factors of lesson planning which are examined. Some of the problems, such as learner profile differences, limited resources, and teacher proficiency, are also noted. It is noted that needs analysis helps to construct effective and useful ESP courses and identifies several important directions for further research, particularly in the area of technology-enhanced ESP instruction and the possibility for cross-departmental cooperation.