Become ISO 14001 auditor

I will consider three levels: 

• Internal auditor;
• External auditor;
• Lead auditor.
   

Each organization has the authority to determine the competency requirements for its internal auditors. As a minimum an internal auditor should have knowledge of ISO 14001 and knowledge of good auditing practices. Someone wanting to become an internal auditor can start with this course: ISO 14001:2015 Internal Auditor Course - https://advisera.com/training/iso-14001-internal-auditor-course/

After that course the new internal auditor can start performing internal audits. Starting in a known environment and with known auditees helps a lot in the first audits. Smaller audits can be done, frequent audits can be done, several techniques can be tested, and helps build trust in own capabilities as time and stress manager.

After several internal audits you can start trying a new environment, performing internal audits as an external auditor. That will test your ability to audit with different people, with different operations and with different cultures. 

Whenever you think you are prepared to become a lead auditor you can start a course like this one: ISO 14001:2015 Lead Auditor Course - https://advisera.com/training/iso-14001-lead-auditor-course/

After that course you can contact several certification bodies and give them your CV stressing your experience and qualifications.

Complement your training with reading whatever you can find about preparing, performing and reporting an audit. I find it useful to discover new tools to use during an audit and learn what other professionals think. You can start with these articles and book:

• Internal Audits in the EMS: Five Main Steps - https://advisera.com/14001academy/blog/2019/08/27/key-iso-14001-benefits-to-customers/nowledgebase/internal-audits-in-the-ems-five-main-steps/ 
• Creating an ISO 14001 internal audit plan - https://advisera.com/14001academy/blog/2017/01/16/creating-an-iso-14001-internal-audit-plan/ 
• ISO Internal Audit: A Plain English Guide - https://advisera.com/books/iso-internal-audit-plain-english-guide/