I am a B.E in Mechanical with 20 years of experience. Am I eligible for admission in MBA in Sales and Marketing in any recognized institute?

Yes, For admission into MBA there will be required B.E degree. So, as you done B.E and you have 20 years of experience will definitely get the admission in MBA. Admission into MBA can take based on the B.E degree. And you have 29 years experience in mechanical degree which helps to get admission def