any manual, unskilled, skilled, technical, operational, clerical or supervisory work for hire or reward. In the case of H.R. Adyanthaya and ors. vs. Sandoz (India) Ltd.6 , the Constitution Bench of the Supreme Court enunciated that to be qualified to be workman under Section 2(s), the person must be employed to do the work which falls in any of the specified categories, manual, unskilled, skilled, technical, operational, clerical or supervisory. To put it in other words, it is not enough that a person is not covered by any of the four exceptions to the definition. It is also fairly well settled that the burden is on the person, who asserts the status of the workman under Section 2(s) to establish with reference to the dominant nature of his duties that the work which the said person performs falls within one of the specified categories under Section 2(s).