"I am in a Senior Managerial position and want to achieve ISO 9001:2015 Lead Auditor certification. Please guide what specific education and requirements do I need for this. I am an MBA with 8 years of work experience. One thing more I have to start as a novice.”
Not knowing your previous knowledge about ISO 9001:2015 and about quality audits, I would recommend you attend a course about ISO 9001:2015 and a course on internal audits. Then, you should network with your contacts in order to practice some internal auditing as external auditor. After some audits, if you feel at ease and if you have any idea about a particular certification body that you want to work with you can contact them as ask their requirements. Sometimes they want or prefer auditors with a particular training reconnaissance, like IRCA certification.
The following material will provide you information about internal audits: