Cochin Shipyard Limited Jobs. Cochin Shipyard Limited (CSL), a listed premier Mini Ratna Company of Govt. of India, invites Online applications from eligible Graduate/Diploma holders in Engineering and Diploma holders in Commercial Practice, for undergoing one-year Apprenticeship training under the Apprentices (Amendment) Act 1973. Name of the Post: A. Category – I Graduate Apprentices: S.No.